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https://github.com/intel/isa-l.git
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examples: reformat using new code style
Signed-off-by: Marcel Cornu <marcel.d.cornu@intel.com>
This commit is contained in:
Marcel Cornu
Pablo de Lara
parent
300260a4d9
commit
9d99f8215d
@ -47,396 +47,412 @@
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#include <immintrin.h>
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#include <isa-l.h>
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int verbose; // Global for tests
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int verbose; // Global for tests
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#if defined (_MSC_VER)
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# define __builtin_parity(x) (__popcnt64(x) & 1)
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#if defined(_MSC_VER)
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#define __builtin_parity(x) (__popcnt64(x) & 1)
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#endif
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#if defined (__GNUC__) || defined (__clang__)
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# define ATTRIBUTE_TARGET(x) __attribute__((target(x)))
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#if defined(__GNUC__) || defined(__clang__)
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#define ATTRIBUTE_TARGET(x) __attribute__((target(x)))
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#else
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# define ATTRIBUTE_TARGET(x)
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#define ATTRIBUTE_TARGET(x)
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#endif
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struct crc64_desc {
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uint64_t poly;
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uint64_t k5;
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uint64_t k7;
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uint64_t k8;
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uint64_t poly;
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uint64_t k5;
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uint64_t k7;
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uint64_t k8;
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};
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void gen_crc64_refl_consts(uint64_t poly, struct crc64_desc *c)
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void
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gen_crc64_refl_consts(uint64_t poly, struct crc64_desc *c)
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{
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uint64_t quotienth = 0;
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uint64_t div;
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uint64_t rem = 1ull;
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int i;
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uint64_t quotienth = 0;
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uint64_t div;
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uint64_t rem = 1ull;
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int i;
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for (i = 0; i < 64; i++) {
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div = (rem & 1ull) != 0;
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quotienth = (quotienth >> 1) | (div ? 0x8000000000000000ull : 0);
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rem = (div ? poly : 0) ^ (rem >> 1);
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}
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c->k5 = rem;
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c->poly = poly;
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c->k7 = quotienth;
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c->k8 = poly << 1;
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for (i = 0; i < 64; i++) {
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div = (rem & 1ull) != 0;
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quotienth = (quotienth >> 1) | (div ? 0x8000000000000000ull : 0);
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rem = (div ? poly : 0) ^ (rem >> 1);
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}
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c->k5 = rem;
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c->poly = poly;
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c->k7 = quotienth;
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c->k8 = poly << 1;
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}
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void gen_crc64_norm_consts(uint64_t poly, struct crc64_desc *c)
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void
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gen_crc64_norm_consts(uint64_t poly, struct crc64_desc *c)
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{
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uint64_t quotientl = 0;
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uint64_t div;
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uint64_t rem = 1ull << 63;
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int i;
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uint64_t quotientl = 0;
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uint64_t div;
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uint64_t rem = 1ull << 63;
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int i;
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for (i = 0; i < 65; i++) {
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div = (rem & 0x8000000000000000ull) != 0;
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quotientl = (quotientl << 1) | div;
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rem = (div ? poly : 0) ^ (rem << 1);
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}
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for (i = 0; i < 65; i++) {
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div = (rem & 0x8000000000000000ull) != 0;
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quotientl = (quotientl << 1) | div;
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rem = (div ? poly : 0) ^ (rem << 1);
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}
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c->poly = poly;
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c->k5 = rem;
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c->k7 = quotientl;
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c->k8 = poly;
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c->poly = poly;
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c->k5 = rem;
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c->k7 = quotientl;
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c->k8 = poly;
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}
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uint32_t calc_xi_mod(int n)
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uint32_t
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calc_xi_mod(int n)
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{
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uint32_t rem = 0x1ul;
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int i, j;
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uint32_t rem = 0x1ul;
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int i, j;
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const uint32_t poly = 0x82f63b78;
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const uint32_t poly = 0x82f63b78;
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if (n < 16)
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return 0;
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if (n < 16)
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return 0;
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for (i = 0; i < n - 8; i++)
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for (j = 0; j < 8; j++)
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rem = (rem & 0x1ul) ? (rem >> 1) ^ poly : (rem >> 1);
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for (i = 0; i < n - 8; i++)
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for (j = 0; j < 8; j++)
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rem = (rem & 0x1ul) ? (rem >> 1) ^ poly : (rem >> 1);
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return rem;
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return rem;
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}
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uint64_t calc64_refl_xi_mod(int n, struct crc64_desc *c)
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uint64_t
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calc64_refl_xi_mod(int n, struct crc64_desc *c)
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{
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uint64_t rem = 1ull;
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int i, j;
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uint64_t rem = 1ull;
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int i, j;
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const uint64_t poly = c->poly;
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const uint64_t poly = c->poly;
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if (n < 32)
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return 0;
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if (n < 32)
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return 0;
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for (i = 0; i < n - 16; i++)
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for (j = 0; j < 8; j++)
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rem = (rem & 0x1ull) ? (rem >> 1) ^ poly : (rem >> 1);
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for (i = 0; i < n - 16; i++)
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for (j = 0; j < 8; j++)
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rem = (rem & 0x1ull) ? (rem >> 1) ^ poly : (rem >> 1);
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return rem;
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return rem;
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}
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uint64_t calc64_norm_xi_mod(int n, struct crc64_desc *c)
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uint64_t
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calc64_norm_xi_mod(int n, struct crc64_desc *c)
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{
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uint64_t rem = 1ull;
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int i, j;
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uint64_t rem = 1ull;
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int i, j;
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const uint64_t poly = c->poly;
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const uint64_t poly = c->poly;
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if (n < 32)
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return 0;
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if (n < 32)
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return 0;
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for (i = 0; i < n - 8; i++)
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for (j = 0; j < 8; j++)
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rem = (rem & 0x8000000000000000ull ? poly : 0) ^ (rem << 1);
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for (i = 0; i < n - 8; i++)
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for (j = 0; j < 8; j++)
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rem = (rem & 0x8000000000000000ull ? poly : 0) ^ (rem << 1);
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return rem;
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return rem;
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}
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// Base function for crc32_iscsi_shiftx() if c++ multi-function versioning
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#ifdef __cplusplus
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static inline uint32_t bit_reverse32(uint32_t x)
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static inline uint32_t
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bit_reverse32(uint32_t x)
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{
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x = (((x & 0xaaaaaaaa) >> 1) | ((x & 0x55555555) << 1));
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x = (((x & 0xcccccccc) >> 2) | ((x & 0x33333333) << 2));
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x = (((x & 0xf0f0f0f0) >> 4) | ((x & 0x0f0f0f0f) << 4));
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x = (((x & 0xff00ff00) >> 8) | ((x & 0x00ff00ff) << 8));
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return ((x >> 16) | (x << 16));
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x = (((x & 0xaaaaaaaa) >> 1) | ((x & 0x55555555) << 1));
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x = (((x & 0xcccccccc) >> 2) | ((x & 0x33333333) << 2));
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x = (((x & 0xf0f0f0f0) >> 4) | ((x & 0x0f0f0f0f) << 4));
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x = (((x & 0xff00ff00) >> 8) | ((x & 0x00ff00ff) << 8));
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return ((x >> 16) | (x << 16));
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}
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// Base function for crc32_iscsi_shiftx without clmul optimizations
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ATTRIBUTE_TARGET("default")
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uint32_t crc32_iscsi_shiftx(uint32_t crc1, uint32_t x)
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uint32_t
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crc32_iscsi_shiftx(uint32_t crc1, uint32_t x)
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{
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int i;
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uint64_t xrev, q = 0;
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union {
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uint8_t a[8];
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uint64_t q;
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} qu;
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int i;
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uint64_t xrev, q = 0;
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union {
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uint8_t a[8];
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uint64_t q;
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} qu;
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xrev = bit_reverse32(x);
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xrev <<= 32;
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xrev = bit_reverse32(x);
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xrev <<= 32;
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for (i = 0; i < 64; i++, xrev >>= 1)
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q = (q << 1) | __builtin_parity(crc1 & xrev);
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for (i = 0; i < 64; i++, xrev >>= 1)
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q = (q << 1) | __builtin_parity(crc1 & xrev);
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qu.q = q;
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return crc32_iscsi(qu.a, 8, 0);
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qu.q = q;
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return crc32_iscsi(qu.a, 8, 0);
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}
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#endif // cplusplus
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ATTRIBUTE_TARGET("pclmul,sse4.2")
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uint32_t crc32_iscsi_shiftx(uint32_t crc1, uint32_t x)
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uint32_t
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crc32_iscsi_shiftx(uint32_t crc1, uint32_t x)
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{
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__m128i crc1x, constx;
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uint64_t crc64;
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__m128i crc1x, constx;
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uint64_t crc64;
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crc1x = _mm_setr_epi32(crc1, 0, 0, 0);
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constx = _mm_setr_epi32(x, 0, 0, 0);
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crc1x = _mm_clmulepi64_si128(crc1x, constx, 0);
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crc64 = _mm_cvtsi128_si64(crc1x);
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crc64 = _mm_crc32_u64(0, crc64);
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return crc64 & 0xffffffff;
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crc1x = _mm_setr_epi32(crc1, 0, 0, 0);
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constx = _mm_setr_epi32(x, 0, 0, 0);
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crc1x = _mm_clmulepi64_si128(crc1x, constx, 0);
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crc64 = _mm_cvtsi128_si64(crc1x);
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crc64 = _mm_crc32_u64(0, crc64);
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return crc64 & 0xffffffff;
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}
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ATTRIBUTE_TARGET("pclmul,sse4.2")
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uint64_t crc64_refl_shiftx(uint64_t crc1, uint64_t x, struct crc64_desc *c)
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uint64_t
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crc64_refl_shiftx(uint64_t crc1, uint64_t x, struct crc64_desc *c)
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{
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__m128i crc1x, crc2x, crc3x, constx;
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const __m128i rk5 = _mm_loadu_si64(&c->k5);
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const __m128i rk7 = _mm_loadu_si128((__m128i *) & c->k7);
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__m128i crc1x, crc2x, crc3x, constx;
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const __m128i rk5 = _mm_loadu_si64(&c->k5);
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const __m128i rk7 = _mm_loadu_si128((__m128i *) &c->k7);
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crc1x = _mm_cvtsi64_si128(crc1);
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constx = _mm_cvtsi64_si128(x);
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crc1x = _mm_clmulepi64_si128(crc1x, constx, 0x00);
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crc1x = _mm_cvtsi64_si128(crc1);
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constx = _mm_cvtsi64_si128(x);
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crc1x = _mm_clmulepi64_si128(crc1x, constx, 0x00);
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// Fold to 64b
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crc2x = _mm_clmulepi64_si128(crc1x, rk5, 0x00);
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crc3x = _mm_bsrli_si128(crc1x, 8);
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crc1x = _mm_xor_si128(crc2x, crc3x);
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// Fold to 64b
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crc2x = _mm_clmulepi64_si128(crc1x, rk5, 0x00);
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crc3x = _mm_bsrli_si128(crc1x, 8);
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crc1x = _mm_xor_si128(crc2x, crc3x);
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// Reduce
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crc2x = _mm_clmulepi64_si128(crc1x, rk7, 0x00);
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crc3x = _mm_clmulepi64_si128(crc2x, rk7, 0x10);
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crc2x = _mm_bslli_si128(crc2x, 8);
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crc1x = _mm_xor_si128(crc1x, crc2x);
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crc1x = _mm_xor_si128(crc1x, crc3x);
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return _mm_extract_epi64(crc1x, 1);
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// Reduce
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crc2x = _mm_clmulepi64_si128(crc1x, rk7, 0x00);
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crc3x = _mm_clmulepi64_si128(crc2x, rk7, 0x10);
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crc2x = _mm_bslli_si128(crc2x, 8);
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crc1x = _mm_xor_si128(crc1x, crc2x);
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crc1x = _mm_xor_si128(crc1x, crc3x);
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return _mm_extract_epi64(crc1x, 1);
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}
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ATTRIBUTE_TARGET("pclmul,sse4.2")
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uint64_t crc64_norm_shiftx(uint64_t crc1, uint64_t x, struct crc64_desc *c)
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uint64_t
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crc64_norm_shiftx(uint64_t crc1, uint64_t x, struct crc64_desc *c)
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{
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__m128i crc1x, crc2x, crc3x, constx;
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const __m128i rk5 = _mm_loadu_si64(&c->k5);
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const __m128i rk7 = _mm_loadu_si128((__m128i *) & c->k7);
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__m128i crc1x, crc2x, crc3x, constx;
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const __m128i rk5 = _mm_loadu_si64(&c->k5);
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const __m128i rk7 = _mm_loadu_si128((__m128i *) &c->k7);
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crc1x = _mm_cvtsi64_si128(crc1);
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constx = _mm_cvtsi64_si128(x);
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crc1x = _mm_clmulepi64_si128(crc1x, constx, 0x00);
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crc1x = _mm_cvtsi64_si128(crc1);
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constx = _mm_cvtsi64_si128(x);
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crc1x = _mm_clmulepi64_si128(crc1x, constx, 0x00);
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// Fold to 64b
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crc2x = _mm_clmulepi64_si128(crc1x, rk5, 0x01);
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crc3x = _mm_bslli_si128(crc1x, 8);
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crc1x = _mm_xor_si128(crc2x, crc3x);
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// Fold to 64b
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crc2x = _mm_clmulepi64_si128(crc1x, rk5, 0x01);
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crc3x = _mm_bslli_si128(crc1x, 8);
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crc1x = _mm_xor_si128(crc2x, crc3x);
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// Reduce
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crc2x = _mm_clmulepi64_si128(crc1x, rk7, 0x01);
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crc2x = _mm_xor_si128(crc1x, crc2x);
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crc3x = _mm_clmulepi64_si128(crc2x, rk7, 0x11);
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crc1x = _mm_xor_si128(crc1x, crc3x);
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return _mm_extract_epi64(crc1x, 0);
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// Reduce
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crc2x = _mm_clmulepi64_si128(crc1x, rk7, 0x01);
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crc2x = _mm_xor_si128(crc1x, crc2x);
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crc3x = _mm_clmulepi64_si128(crc2x, rk7, 0x11);
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crc1x = _mm_xor_si128(crc1x, crc3x);
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return _mm_extract_epi64(crc1x, 0);
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}
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uint32_t crc32_iscsi_combine_4k(uint32_t * crc_array, int n)
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uint32_t
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crc32_iscsi_combine_4k(uint32_t *crc_array, int n)
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{
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const uint32_t cn4k = 0x82f89c77; //calc_xi_mod(4*1024);
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int i;
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const uint32_t cn4k = 0x82f89c77; // calc_xi_mod(4*1024);
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int i;
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if (n < 1)
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return 0;
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if (n < 1)
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return 0;
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uint32_t crc = crc_array[0];
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uint32_t crc = crc_array[0];
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for (i = 1; i < n; i++)
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crc = crc32_iscsi_shiftx(crc, cn4k) ^ crc_array[i];
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for (i = 1; i < n; i++)
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crc = crc32_iscsi_shiftx(crc, cn4k) ^ crc_array[i];
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return crc;
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return crc;
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}
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// Tests
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#define printv(...) {if (verbose) printf(__VA_ARGS__); else printf(".");}
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#define printv(...) \
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{ \
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if (verbose) \
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printf(__VA_ARGS__); \
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else \
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printf("."); \
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}
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uint64_t test_combine64(uint8_t * inp, size_t len, uint64_t poly, int reflected,
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uint64_t(*func) (uint64_t, const uint8_t *, uint64_t))
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uint64_t
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test_combine64(uint8_t *inp, size_t len, uint64_t poly, int reflected,
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uint64_t (*func)(uint64_t, const uint8_t *, uint64_t))
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{
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uint64_t crc64_init, crc64, crc64a, crc64b;
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uint64_t crc64_1, crc64_2, crc64_3, crc64_n, err = 0;
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uint64_t xi_mod;
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struct crc64_desc crc64_c;
|
||||
size_t l1, l2, l3;
|
||||
uint64_t crc64_init, crc64, crc64a, crc64b;
|
||||
uint64_t crc64_1, crc64_2, crc64_3, crc64_n, err = 0;
|
||||
uint64_t xi_mod;
|
||||
struct crc64_desc crc64_c;
|
||||
size_t l1, l2, l3;
|
||||
|
||||
l1 = len / 2;
|
||||
l2 = len - l1;
|
||||
l1 = len / 2;
|
||||
l2 = len - l1;
|
||||
|
||||
crc64_init = rand();
|
||||
crc64 = func(crc64_init, inp, len);
|
||||
printv("\ncrc64 all = 0x%" PRIx64 "\n", crc64);
|
||||
crc64_init = rand();
|
||||
crc64 = func(crc64_init, inp, len);
|
||||
printv("\ncrc64 all = 0x%" PRIx64 "\n", crc64);
|
||||
|
||||
// Do a sequential crc update
|
||||
crc64a = func(crc64_init, &inp[0], l1);
|
||||
crc64b = func(crc64a, &inp[l1], l2);
|
||||
printv("crc64 seq = 0x%" PRIx64 "\n", crc64b);
|
||||
// Do a sequential crc update
|
||||
crc64a = func(crc64_init, &inp[0], l1);
|
||||
crc64b = func(crc64a, &inp[l1], l2);
|
||||
printv("crc64 seq = 0x%" PRIx64 "\n", crc64b);
|
||||
|
||||
// Split into 2 independent crc calc and combine
|
||||
crc64_1 = func(crc64_init, &inp[0], l1);
|
||||
crc64_2 = func(0, &inp[l1], l2);
|
||||
// Split into 2 independent crc calc and combine
|
||||
crc64_1 = func(crc64_init, &inp[0], l1);
|
||||
crc64_2 = func(0, &inp[l1], l2);
|
||||
|
||||
if (reflected) {
|
||||
gen_crc64_refl_consts(poly, &crc64_c);
|
||||
xi_mod = calc64_refl_xi_mod(l1, &crc64_c);
|
||||
crc64_1 = crc64_refl_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
} else {
|
||||
gen_crc64_norm_consts(poly, &crc64_c);
|
||||
xi_mod = calc64_norm_xi_mod(l1, &crc64_c);
|
||||
crc64_1 = crc64_norm_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
}
|
||||
crc64_n = crc64_1 ^ crc64_2;
|
||||
if (reflected) {
|
||||
gen_crc64_refl_consts(poly, &crc64_c);
|
||||
xi_mod = calc64_refl_xi_mod(l1, &crc64_c);
|
||||
crc64_1 = crc64_refl_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
} else {
|
||||
gen_crc64_norm_consts(poly, &crc64_c);
|
||||
xi_mod = calc64_norm_xi_mod(l1, &crc64_c);
|
||||
crc64_1 = crc64_norm_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
}
|
||||
crc64_n = crc64_1 ^ crc64_2;
|
||||
|
||||
printv("crc64 combined2 = 0x%" PRIx64 "\n", crc64_n);
|
||||
err |= crc64_n ^ crc64;
|
||||
if (err)
|
||||
return err;
|
||||
printv("crc64 combined2 = 0x%" PRIx64 "\n", crc64_n);
|
||||
err |= crc64_n ^ crc64;
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
// Split into 3 uneven segments and combine
|
||||
l1 = len / 3;
|
||||
l2 = (len / 3) - 3;
|
||||
l3 = len - l2 - l1;
|
||||
crc64_1 = func(crc64_init, &inp[0], l1);
|
||||
crc64_2 = func(0, &inp[l1], l2);
|
||||
crc64_3 = func(0, &inp[l1 + l2], l3);
|
||||
if (reflected) {
|
||||
xi_mod = calc64_refl_xi_mod(l3, &crc64_c);
|
||||
crc64_2 = crc64_refl_shiftx(crc64_2, xi_mod, &crc64_c);
|
||||
xi_mod = calc64_refl_xi_mod(len - l1, &crc64_c);
|
||||
crc64_1 = crc64_refl_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
} else {
|
||||
xi_mod = calc64_norm_xi_mod(l3, &crc64_c);
|
||||
crc64_2 = crc64_norm_shiftx(crc64_2, xi_mod, &crc64_c);
|
||||
xi_mod = calc64_norm_xi_mod(len - l1, &crc64_c);
|
||||
crc64_1 = crc64_norm_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
}
|
||||
crc64_n = crc64_1 ^ crc64_2 ^ crc64_3;
|
||||
// Split into 3 uneven segments and combine
|
||||
l1 = len / 3;
|
||||
l2 = (len / 3) - 3;
|
||||
l3 = len - l2 - l1;
|
||||
crc64_1 = func(crc64_init, &inp[0], l1);
|
||||
crc64_2 = func(0, &inp[l1], l2);
|
||||
crc64_3 = func(0, &inp[l1 + l2], l3);
|
||||
if (reflected) {
|
||||
xi_mod = calc64_refl_xi_mod(l3, &crc64_c);
|
||||
crc64_2 = crc64_refl_shiftx(crc64_2, xi_mod, &crc64_c);
|
||||
xi_mod = calc64_refl_xi_mod(len - l1, &crc64_c);
|
||||
crc64_1 = crc64_refl_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
} else {
|
||||
xi_mod = calc64_norm_xi_mod(l3, &crc64_c);
|
||||
crc64_2 = crc64_norm_shiftx(crc64_2, xi_mod, &crc64_c);
|
||||
xi_mod = calc64_norm_xi_mod(len - l1, &crc64_c);
|
||||
crc64_1 = crc64_norm_shiftx(crc64_1, xi_mod, &crc64_c);
|
||||
}
|
||||
crc64_n = crc64_1 ^ crc64_2 ^ crc64_3;
|
||||
|
||||
printv("crc64 combined3 = 0x%" PRIx64 "\n", crc64_n);
|
||||
err |= crc64_n ^ crc64;
|
||||
printv("crc64 combined3 = 0x%" PRIx64 "\n", crc64_n);
|
||||
err |= crc64_n ^ crc64;
|
||||
|
||||
return err;
|
||||
return err;
|
||||
}
|
||||
|
||||
#define N (1024)
|
||||
#define B (2*N)
|
||||
#define T (3*N)
|
||||
#define N4k (4*1024)
|
||||
#define NMAX 32
|
||||
#define N (1024)
|
||||
#define B (2 * N)
|
||||
#define T (3 * N)
|
||||
#define N4k (4 * 1024)
|
||||
#define NMAX 32
|
||||
#define NMAX_SIZE (NMAX * N4k)
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
int i;
|
||||
uint32_t crc, crca, crcb, crc1, crc2, crc3, crcn;
|
||||
uint32_t crc_init = rand();
|
||||
uint32_t err = 0;
|
||||
uint8_t *inp = (uint8_t *) malloc(NMAX_SIZE);
|
||||
verbose = argc - 1;
|
||||
int i;
|
||||
uint32_t crc, crca, crcb, crc1, crc2, crc3, crcn;
|
||||
uint32_t crc_init = rand();
|
||||
uint32_t err = 0;
|
||||
uint8_t *inp = (uint8_t *) malloc(NMAX_SIZE);
|
||||
verbose = argc - 1;
|
||||
|
||||
if (NULL == inp)
|
||||
return -1;
|
||||
if (NULL == inp)
|
||||
return -1;
|
||||
|
||||
for (int i = 0; i < NMAX_SIZE; i++)
|
||||
inp[i] = rand();
|
||||
for (int i = 0; i < NMAX_SIZE; i++)
|
||||
inp[i] = rand();
|
||||
|
||||
printf("crc_combine_test:");
|
||||
printf("crc_combine_test:");
|
||||
|
||||
// Calc crc all at once
|
||||
crc = crc32_iscsi(inp, B, crc_init);
|
||||
printv("\ncrcB all = 0x%" PRIx32 "\n", crc);
|
||||
// Calc crc all at once
|
||||
crc = crc32_iscsi(inp, B, crc_init);
|
||||
printv("\ncrcB all = 0x%" PRIx32 "\n", crc);
|
||||
|
||||
// Do a sequential crc update
|
||||
crca = crc32_iscsi(&inp[0], N, crc_init);
|
||||
crcb = crc32_iscsi(&inp[N], N, crca);
|
||||
printv("crcB seq = 0x%" PRIx32 "\n", crcb);
|
||||
// Do a sequential crc update
|
||||
crca = crc32_iscsi(&inp[0], N, crc_init);
|
||||
crcb = crc32_iscsi(&inp[N], N, crca);
|
||||
printv("crcB seq = 0x%" PRIx32 "\n", crcb);
|
||||
|
||||
// Split into 2 independent crc calc and combine
|
||||
crc1 = crc32_iscsi(&inp[0], N, crc_init);
|
||||
crc2 = crc32_iscsi(&inp[N], N, 0);
|
||||
crcn = crc32_iscsi_shiftx(crc1, calc_xi_mod(N)) ^ crc2;
|
||||
printv("crcB combined2 = 0x%" PRIx32 "\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
// Split into 2 independent crc calc and combine
|
||||
crc1 = crc32_iscsi(&inp[0], N, crc_init);
|
||||
crc2 = crc32_iscsi(&inp[N], N, 0);
|
||||
crcn = crc32_iscsi_shiftx(crc1, calc_xi_mod(N)) ^ crc2;
|
||||
printv("crcB combined2 = 0x%" PRIx32 "\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
|
||||
// Split into 3 uneven segments and combine
|
||||
crc1 = crc32_iscsi(&inp[0], 100, crc_init);
|
||||
crc2 = crc32_iscsi(&inp[100], 100, 0);
|
||||
crc3 = crc32_iscsi(&inp[200], B - 200, 0);
|
||||
crcn = crc3 ^
|
||||
crc32_iscsi_shiftx(crc2, calc_xi_mod(B - 200)) ^
|
||||
crc32_iscsi_shiftx(crc1, calc_xi_mod(B - 100));
|
||||
printv("crcB combined3 = 0x%" PRIx32 "\n\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
// Split into 3 uneven segments and combine
|
||||
crc1 = crc32_iscsi(&inp[0], 100, crc_init);
|
||||
crc2 = crc32_iscsi(&inp[100], 100, 0);
|
||||
crc3 = crc32_iscsi(&inp[200], B - 200, 0);
|
||||
crcn = crc3 ^ crc32_iscsi_shiftx(crc2, calc_xi_mod(B - 200)) ^
|
||||
crc32_iscsi_shiftx(crc1, calc_xi_mod(B - 100));
|
||||
printv("crcB combined3 = 0x%" PRIx32 "\n\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
|
||||
// Call all size T at once
|
||||
crc = crc32_iscsi(inp, T, crc_init);
|
||||
printv("crcT all = 0x%" PRIx32 "\n", crc);
|
||||
// Call all size T at once
|
||||
crc = crc32_iscsi(inp, T, crc_init);
|
||||
printv("crcT all = 0x%" PRIx32 "\n", crc);
|
||||
|
||||
// Split into 3 segments and combine with 2 consts
|
||||
crc1 = crc32_iscsi(&inp[0], N, crc_init);
|
||||
crc2 = crc32_iscsi(&inp[N], N, 0);
|
||||
crc3 = crc32_iscsi(&inp[2 * N], N, 0);
|
||||
crcn = crc3 ^
|
||||
crc32_iscsi_shiftx(crc2, calc_xi_mod(N)) ^
|
||||
crc32_iscsi_shiftx(crc1, calc_xi_mod(2 * N));
|
||||
printv("crcT combined3 = 0x%" PRIx32 "\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
// Split into 3 segments and combine with 2 consts
|
||||
crc1 = crc32_iscsi(&inp[0], N, crc_init);
|
||||
crc2 = crc32_iscsi(&inp[N], N, 0);
|
||||
crc3 = crc32_iscsi(&inp[2 * N], N, 0);
|
||||
crcn = crc3 ^ crc32_iscsi_shiftx(crc2, calc_xi_mod(N)) ^
|
||||
crc32_iscsi_shiftx(crc1, calc_xi_mod(2 * N));
|
||||
printv("crcT combined3 = 0x%" PRIx32 "\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
|
||||
// Combine 3 segments with one const by sequential shift
|
||||
uint32_t xi_mod_n = calc_xi_mod(N);
|
||||
crcn = crc3 ^ crc32_iscsi_shiftx(crc32_iscsi_shiftx(crc1, xi_mod_n)
|
||||
^ crc2, xi_mod_n);
|
||||
printv("crcT comb3 seq = 0x%" PRIx32 "\n\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
// Combine 3 segments with one const by sequential shift
|
||||
uint32_t xi_mod_n = calc_xi_mod(N);
|
||||
crcn = crc3 ^ crc32_iscsi_shiftx(crc32_iscsi_shiftx(crc1, xi_mod_n) ^ crc2, xi_mod_n);
|
||||
printv("crcT comb3 seq = 0x%" PRIx32 "\n\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
|
||||
// Test 4k array function
|
||||
crc = crc32_iscsi(inp, NMAX_SIZE, crc_init);
|
||||
printv("crc 4k x n all = 0x%" PRIx32 "\n", crc);
|
||||
// Test 4k array function
|
||||
crc = crc32_iscsi(inp, NMAX_SIZE, crc_init);
|
||||
printv("crc 4k x n all = 0x%" PRIx32 "\n", crc);
|
||||
|
||||
// Test crc 4k array combine function
|
||||
uint32_t crcs[NMAX];
|
||||
crcs[0] = crc32_iscsi(&inp[0], N4k, crc_init);
|
||||
for (i = 1; i < NMAX; i++)
|
||||
crcs[i] = crc32_iscsi(&inp[i * N4k], N4k, 0);
|
||||
// Test crc 4k array combine function
|
||||
uint32_t crcs[NMAX];
|
||||
crcs[0] = crc32_iscsi(&inp[0], N4k, crc_init);
|
||||
for (i = 1; i < NMAX; i++)
|
||||
crcs[i] = crc32_iscsi(&inp[i * N4k], N4k, 0);
|
||||
|
||||
crcn = crc32_iscsi_combine_4k(crcs, NMAX);
|
||||
printv("crc4k_array = 0x%" PRIx32 "\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
crcn = crc32_iscsi_combine_4k(crcs, NMAX);
|
||||
printv("crc4k_array = 0x%" PRIx32 "\n", crcn);
|
||||
err |= crcn ^ crc;
|
||||
|
||||
// CRC64 generic poly tests - reflected
|
||||
uint64_t len = NMAX_SIZE;
|
||||
err |= test_combine64(inp, len, 0xc96c5795d7870f42ull, 1, crc64_ecma_refl);
|
||||
err |= test_combine64(inp, len, 0xd800000000000000ull, 1, crc64_iso_refl);
|
||||
err |= test_combine64(inp, len, 0x95ac9329ac4bc9b5ull, 1, crc64_jones_refl);
|
||||
// CRC64 generic poly tests - reflected
|
||||
uint64_t len = NMAX_SIZE;
|
||||
err |= test_combine64(inp, len, 0xc96c5795d7870f42ull, 1, crc64_ecma_refl);
|
||||
err |= test_combine64(inp, len, 0xd800000000000000ull, 1, crc64_iso_refl);
|
||||
err |= test_combine64(inp, len, 0x95ac9329ac4bc9b5ull, 1, crc64_jones_refl);
|
||||
|
||||
// CRC64 non-reflected polynomial tests
|
||||
err |= test_combine64(inp, len, 0x42f0e1eba9ea3693ull, 0, crc64_ecma_norm);
|
||||
err |= test_combine64(inp, len, 0x000000000000001bull, 0, crc64_iso_norm);
|
||||
err |= test_combine64(inp, len, 0xad93d23594c935a9ull, 0, crc64_jones_norm);
|
||||
// CRC64 non-reflected polynomial tests
|
||||
err |= test_combine64(inp, len, 0x42f0e1eba9ea3693ull, 0, crc64_ecma_norm);
|
||||
err |= test_combine64(inp, len, 0x000000000000001bull, 0, crc64_iso_norm);
|
||||
err |= test_combine64(inp, len, 0xad93d23594c935a9ull, 0, crc64_jones_norm);
|
||||
|
||||
printf(err == 0 ? "pass\n" : "fail\n");
|
||||
free(inp);
|
||||
return err;
|
||||
printf(err == 0 ? "pass\n" : "fail\n");
|
||||
free(inp);
|
||||
return err;
|
||||
}
|
||||
|
||||
@ -31,7 +31,7 @@
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <getopt.h>
|
||||
#include "erasure_code.h" // use <isa-l.h> instead when linking against installed
|
||||
#include "erasure_code.h" // use <isa-l.h> instead when linking against installed
|
||||
#include "test.h"
|
||||
|
||||
#define MMAX 255
|
||||
@ -40,467 +40,463 @@
|
||||
typedef unsigned char u8;
|
||||
int verbose = 0;
|
||||
|
||||
int usage(void)
|
||||
int
|
||||
usage(void)
|
||||
{
|
||||
fprintf(stderr,
|
||||
"Usage: ec_piggyback_example [options]\n"
|
||||
" -h Help\n"
|
||||
" -k <val> Number of source fragments\n"
|
||||
" -p <val> Number of parity fragments\n"
|
||||
" -l <val> Length of fragments\n"
|
||||
" -e <val> Simulate erasure on frag index val. Zero based. Can be repeated.\n"
|
||||
" -v Verbose\n"
|
||||
" -b Run timed benchmark\n"
|
||||
" -s Toggle use of sparse matrix opt\n"
|
||||
" -r <seed> Pick random (k, p) with seed\n");
|
||||
exit(0);
|
||||
fprintf(stderr,
|
||||
"Usage: ec_piggyback_example [options]\n"
|
||||
" -h Help\n"
|
||||
" -k <val> Number of source fragments\n"
|
||||
" -p <val> Number of parity fragments\n"
|
||||
" -l <val> Length of fragments\n"
|
||||
" -e <val> Simulate erasure on frag index val. Zero based. Can be repeated.\n"
|
||||
" -v Verbose\n"
|
||||
" -b Run timed benchmark\n"
|
||||
" -s Toggle use of sparse matrix opt\n"
|
||||
" -r <seed> Pick random (k, p) with seed\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
// Cauchy-based matrix
|
||||
void gf_gen_full_pb_cauchy_matrix(u8 * a, int m, int k)
|
||||
void
|
||||
gf_gen_full_pb_cauchy_matrix(u8 *a, int m, int k)
|
||||
{
|
||||
int i, j, p = m - k;
|
||||
int i, j, p = m - k;
|
||||
|
||||
// Identity matrix in top k x k to indicate a symmetric code
|
||||
memset(a, 0, k * m);
|
||||
for (i = 0; i < k; i++)
|
||||
a[k * i + i] = 1;
|
||||
// Identity matrix in top k x k to indicate a symmetric code
|
||||
memset(a, 0, k * m);
|
||||
for (i = 0; i < k; i++)
|
||||
a[k * i + i] = 1;
|
||||
|
||||
for (i = k; i < (k + p / 2); i++) {
|
||||
for (j = 0; j < k / 2; j++)
|
||||
a[k * i + j] = gf_inv(i ^ j);
|
||||
for (; j < k; j++)
|
||||
a[k * i + j] = 0;
|
||||
}
|
||||
for (; i < m; i++) {
|
||||
for (j = 0; j < k / 2; j++)
|
||||
a[k * i + j] = 0;
|
||||
for (; j < k; j++)
|
||||
a[k * i + j] = gf_inv((i - p / 2) ^ (j - k / 2));
|
||||
}
|
||||
for (i = k; i < (k + p / 2); i++) {
|
||||
for (j = 0; j < k / 2; j++)
|
||||
a[k * i + j] = gf_inv(i ^ j);
|
||||
for (; j < k; j++)
|
||||
a[k * i + j] = 0;
|
||||
}
|
||||
for (; i < m; i++) {
|
||||
for (j = 0; j < k / 2; j++)
|
||||
a[k * i + j] = 0;
|
||||
for (; j < k; j++)
|
||||
a[k * i + j] = gf_inv((i - p / 2) ^ (j - k / 2));
|
||||
}
|
||||
|
||||
// Fill in mixture of B parity depending on a few localized A sources
|
||||
int r = 0, c = 0;
|
||||
int repeat_len = k / (p - 2);
|
||||
int parity_rows = p / 2;
|
||||
// Fill in mixture of B parity depending on a few localized A sources
|
||||
int r = 0, c = 0;
|
||||
int repeat_len = k / (p - 2);
|
||||
int parity_rows = p / 2;
|
||||
|
||||
for (i = 1 + k + parity_rows; i < m; i++, r++) {
|
||||
if (r == (parity_rows - 1) - ((k / 2 % (parity_rows - 1))))
|
||||
repeat_len++;
|
||||
for (i = 1 + k + parity_rows; i < m; i++, r++) {
|
||||
if (r == (parity_rows - 1) - ((k / 2 % (parity_rows - 1))))
|
||||
repeat_len++;
|
||||
|
||||
for (j = 0; j < repeat_len; j++, c++)
|
||||
a[k * i + c] = gf_inv((k + 1) ^ c);
|
||||
}
|
||||
for (j = 0; j < repeat_len; j++, c++)
|
||||
a[k * i + c] = gf_inv((k + 1) ^ c);
|
||||
}
|
||||
}
|
||||
|
||||
// Vandermonde based matrix - not recommended due to limits when invertable
|
||||
void gf_gen_full_pb_vand_matrix(u8 * a, int m, int k)
|
||||
void
|
||||
gf_gen_full_pb_vand_matrix(u8 *a, int m, int k)
|
||||
{
|
||||
int i, j, p = m - k;
|
||||
unsigned char q, gen = 1;
|
||||
int i, j, p = m - k;
|
||||
unsigned char q, gen = 1;
|
||||
|
||||
// Identity matrix in top k x k to indicate a symmetric code
|
||||
memset(a, 0, k * m);
|
||||
for (i = 0; i < k; i++)
|
||||
a[k * i + i] = 1;
|
||||
// Identity matrix in top k x k to indicate a symmetric code
|
||||
memset(a, 0, k * m);
|
||||
for (i = 0; i < k; i++)
|
||||
a[k * i + i] = 1;
|
||||
|
||||
for (i = k; i < (k + (p / 2)); i++) {
|
||||
q = 1;
|
||||
for (j = 0; j < k / 2; j++) {
|
||||
a[k * i + j] = q;
|
||||
q = gf_mul(q, gen);
|
||||
}
|
||||
for (; j < k; j++)
|
||||
a[k * i + j] = 0;
|
||||
gen = gf_mul(gen, 2);
|
||||
}
|
||||
gen = 1;
|
||||
for (; i < m; i++) {
|
||||
q = 1;
|
||||
for (j = 0; j < k / 2; j++) {
|
||||
a[k * i + j] = 0;
|
||||
}
|
||||
for (; j < k; j++) {
|
||||
a[k * i + j] = q;
|
||||
q = gf_mul(q, gen);
|
||||
}
|
||||
gen = gf_mul(gen, 2);
|
||||
}
|
||||
for (i = k; i < (k + (p / 2)); i++) {
|
||||
q = 1;
|
||||
for (j = 0; j < k / 2; j++) {
|
||||
a[k * i + j] = q;
|
||||
q = gf_mul(q, gen);
|
||||
}
|
||||
for (; j < k; j++)
|
||||
a[k * i + j] = 0;
|
||||
gen = gf_mul(gen, 2);
|
||||
}
|
||||
gen = 1;
|
||||
for (; i < m; i++) {
|
||||
q = 1;
|
||||
for (j = 0; j < k / 2; j++) {
|
||||
a[k * i + j] = 0;
|
||||
}
|
||||
for (; j < k; j++) {
|
||||
a[k * i + j] = q;
|
||||
q = gf_mul(q, gen);
|
||||
}
|
||||
gen = gf_mul(gen, 2);
|
||||
}
|
||||
|
||||
// Fill in mixture of B parity depending on a few localized A sources
|
||||
int r = 0, c = 0;
|
||||
int repeat_len = k / (p - 2);
|
||||
int parity_rows = p / 2;
|
||||
// Fill in mixture of B parity depending on a few localized A sources
|
||||
int r = 0, c = 0;
|
||||
int repeat_len = k / (p - 2);
|
||||
int parity_rows = p / 2;
|
||||
|
||||
for (i = 1 + k + parity_rows; i < m; i++, r++) {
|
||||
if (r == (parity_rows - 1) - ((k / 2 % (parity_rows - 1))))
|
||||
repeat_len++;
|
||||
for (i = 1 + k + parity_rows; i < m; i++, r++) {
|
||||
if (r == (parity_rows - 1) - ((k / 2 % (parity_rows - 1))))
|
||||
repeat_len++;
|
||||
|
||||
for (j = 0; j < repeat_len; j++)
|
||||
a[k * i + c++] = 1;
|
||||
}
|
||||
for (j = 0; j < repeat_len; j++)
|
||||
a[k * i + c++] = 1;
|
||||
}
|
||||
}
|
||||
|
||||
void print_matrix(int m, int k, unsigned char *s, const char *msg)
|
||||
void
|
||||
print_matrix(int m, int k, unsigned char *s, const char *msg)
|
||||
{
|
||||
int i, j;
|
||||
int i, j;
|
||||
|
||||
printf("%s:\n", msg);
|
||||
for (i = 0; i < m; i++) {
|
||||
printf("%3d- ", i);
|
||||
for (j = 0; j < k; j++) {
|
||||
printf(" %2x", 0xff & s[j + (i * k)]);
|
||||
}
|
||||
printf("\n");
|
||||
}
|
||||
printf("\n");
|
||||
printf("%s:\n", msg);
|
||||
for (i = 0; i < m; i++) {
|
||||
printf("%3d- ", i);
|
||||
for (j = 0; j < k; j++) {
|
||||
printf(" %2x", 0xff & s[j + (i * k)]);
|
||||
}
|
||||
printf("\n");
|
||||
}
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
void print_list(int n, unsigned char *s, const char *msg)
|
||||
void
|
||||
print_list(int n, unsigned char *s, const char *msg)
|
||||
{
|
||||
int i;
|
||||
if (!verbose)
|
||||
return;
|
||||
int i;
|
||||
if (!verbose)
|
||||
return;
|
||||
|
||||
printf("%s: ", msg);
|
||||
for (i = 0; i < n; i++)
|
||||
printf(" %d", s[i]);
|
||||
printf("\n");
|
||||
printf("%s: ", msg);
|
||||
for (i = 0; i < n; i++)
|
||||
printf(" %d", s[i]);
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
static int gf_gen_decode_matrix(u8 * encode_matrix,
|
||||
u8 * decode_matrix,
|
||||
u8 * invert_matrix,
|
||||
u8 * temp_matrix,
|
||||
u8 * decode_index,
|
||||
u8 * frag_err_list, int nerrs, int k, int m);
|
||||
static int
|
||||
gf_gen_decode_matrix(u8 *encode_matrix, u8 *decode_matrix, u8 *invert_matrix, u8 *temp_matrix,
|
||||
u8 *decode_index, u8 *frag_err_list, int nerrs, int k, int m);
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
int i, j, m, c, e, ret;
|
||||
int k = 10, p = 4, len = 8 * 1024; // Default params
|
||||
int nerrs = 0;
|
||||
int benchmark = 0;
|
||||
int sparse_matrix_opt = 1;
|
||||
int i, j, m, c, e, ret;
|
||||
int k = 10, p = 4, len = 8 * 1024; // Default params
|
||||
int nerrs = 0;
|
||||
int benchmark = 0;
|
||||
int sparse_matrix_opt = 1;
|
||||
|
||||
// Fragment buffer pointers
|
||||
u8 *frag_ptrs[MMAX];
|
||||
u8 *parity_ptrs[KMAX];
|
||||
u8 *recover_srcs[KMAX];
|
||||
u8 *recover_outp[KMAX];
|
||||
u8 frag_err_list[MMAX];
|
||||
// Fragment buffer pointers
|
||||
u8 *frag_ptrs[MMAX];
|
||||
u8 *parity_ptrs[KMAX];
|
||||
u8 *recover_srcs[KMAX];
|
||||
u8 *recover_outp[KMAX];
|
||||
u8 frag_err_list[MMAX];
|
||||
|
||||
// Coefficient matrices
|
||||
u8 *encode_matrix, *decode_matrix;
|
||||
u8 *invert_matrix, *temp_matrix;
|
||||
u8 *g_tbls;
|
||||
u8 decode_index[MMAX];
|
||||
// Coefficient matrices
|
||||
u8 *encode_matrix, *decode_matrix;
|
||||
u8 *invert_matrix, *temp_matrix;
|
||||
u8 *g_tbls;
|
||||
u8 decode_index[MMAX];
|
||||
|
||||
if (argc == 1)
|
||||
for (i = 0; i < p; i++)
|
||||
frag_err_list[nerrs++] = rand() % (k + p);
|
||||
if (argc == 1)
|
||||
for (i = 0; i < p; i++)
|
||||
frag_err_list[nerrs++] = rand() % (k + p);
|
||||
|
||||
while ((c = getopt(argc, argv, "k:p:l:e:r:hvbs")) != -1) {
|
||||
switch (c) {
|
||||
case 'k':
|
||||
k = atoi(optarg);
|
||||
break;
|
||||
case 'p':
|
||||
p = atoi(optarg);
|
||||
break;
|
||||
case 'l':
|
||||
len = atoi(optarg);
|
||||
if (len < 0)
|
||||
usage();
|
||||
break;
|
||||
case 'e':
|
||||
e = atoi(optarg);
|
||||
frag_err_list[nerrs++] = e;
|
||||
break;
|
||||
case 'r':
|
||||
srand(atoi(optarg));
|
||||
k = (rand() % MMAX) / 4;
|
||||
k = (k < 2) ? 2 : k;
|
||||
p = (rand() % (MMAX - k)) / 4;
|
||||
p = (p < 2) ? 2 : p;
|
||||
for (i = 0; i < k && nerrs < p; i++)
|
||||
if (rand() & 1)
|
||||
frag_err_list[nerrs++] = i;
|
||||
break;
|
||||
case 'v':
|
||||
verbose++;
|
||||
break;
|
||||
case 'b':
|
||||
benchmark = 1;
|
||||
break;
|
||||
case 's':
|
||||
sparse_matrix_opt = !sparse_matrix_opt;
|
||||
break;
|
||||
case 'h':
|
||||
default:
|
||||
usage();
|
||||
break;
|
||||
}
|
||||
}
|
||||
m = k + p;
|
||||
while ((c = getopt(argc, argv, "k:p:l:e:r:hvbs")) != -1) {
|
||||
switch (c) {
|
||||
case 'k':
|
||||
k = atoi(optarg);
|
||||
break;
|
||||
case 'p':
|
||||
p = atoi(optarg);
|
||||
break;
|
||||
case 'l':
|
||||
len = atoi(optarg);
|
||||
if (len < 0)
|
||||
usage();
|
||||
break;
|
||||
case 'e':
|
||||
e = atoi(optarg);
|
||||
frag_err_list[nerrs++] = e;
|
||||
break;
|
||||
case 'r':
|
||||
srand(atoi(optarg));
|
||||
k = (rand() % MMAX) / 4;
|
||||
k = (k < 2) ? 2 : k;
|
||||
p = (rand() % (MMAX - k)) / 4;
|
||||
p = (p < 2) ? 2 : p;
|
||||
for (i = 0; i < k && nerrs < p; i++)
|
||||
if (rand() & 1)
|
||||
frag_err_list[nerrs++] = i;
|
||||
break;
|
||||
case 'v':
|
||||
verbose++;
|
||||
break;
|
||||
case 'b':
|
||||
benchmark = 1;
|
||||
break;
|
||||
case 's':
|
||||
sparse_matrix_opt = !sparse_matrix_opt;
|
||||
break;
|
||||
case 'h':
|
||||
default:
|
||||
usage();
|
||||
break;
|
||||
}
|
||||
}
|
||||
m = k + p;
|
||||
|
||||
// Check for valid parameters
|
||||
if (m > (MMAX / 2) || k > (KMAX / 2) || m < 0 || p < 2 || k < 1) {
|
||||
printf(" Input test parameter error m=%d, k=%d, p=%d, erasures=%d\n",
|
||||
m, k, p, nerrs);
|
||||
usage();
|
||||
}
|
||||
if (nerrs > p) {
|
||||
printf(" Number of erasures chosen exceeds power of code erasures=%d p=%d\n",
|
||||
nerrs, p);
|
||||
}
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] >= m)
|
||||
printf(" fragment %d not in range\n", frag_err_list[i]);
|
||||
}
|
||||
// Check for valid parameters
|
||||
if (m > (MMAX / 2) || k > (KMAX / 2) || m < 0 || p < 2 || k < 1) {
|
||||
printf(" Input test parameter error m=%d, k=%d, p=%d, erasures=%d\n", m, k, p,
|
||||
nerrs);
|
||||
usage();
|
||||
}
|
||||
if (nerrs > p) {
|
||||
printf(" Number of erasures chosen exceeds power of code erasures=%d p=%d\n", nerrs,
|
||||
p);
|
||||
}
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] >= m)
|
||||
printf(" fragment %d not in range\n", frag_err_list[i]);
|
||||
}
|
||||
|
||||
printf("ec_piggyback_example:\n");
|
||||
printf("ec_piggyback_example:\n");
|
||||
|
||||
/*
|
||||
* One simple way to implement piggyback codes is to keep a 2x wide matrix
|
||||
* that covers the how each parity is related to both A and B sources. This
|
||||
* keeps it easy to generalize in parameters m,k and the resulting sparse
|
||||
* matrix multiplication can be optimized by pre-removal of zero items.
|
||||
*/
|
||||
/*
|
||||
* One simple way to implement piggyback codes is to keep a 2x wide matrix
|
||||
* that covers the how each parity is related to both A and B sources. This
|
||||
* keeps it easy to generalize in parameters m,k and the resulting sparse
|
||||
* matrix multiplication can be optimized by pre-removal of zero items.
|
||||
*/
|
||||
|
||||
int k2 = 2 * k;
|
||||
int p2 = 2 * p;
|
||||
int m2 = k2 + p2;
|
||||
int nerrs2 = nerrs;
|
||||
int k2 = 2 * k;
|
||||
int p2 = 2 * p;
|
||||
int m2 = k2 + p2;
|
||||
int nerrs2 = nerrs;
|
||||
|
||||
encode_matrix = malloc(m2 * k2);
|
||||
decode_matrix = malloc(m2 * k2);
|
||||
invert_matrix = malloc(m2 * k2);
|
||||
temp_matrix = malloc(m2 * k2);
|
||||
g_tbls = malloc(k2 * p2 * 32);
|
||||
encode_matrix = malloc(m2 * k2);
|
||||
decode_matrix = malloc(m2 * k2);
|
||||
invert_matrix = malloc(m2 * k2);
|
||||
temp_matrix = malloc(m2 * k2);
|
||||
g_tbls = malloc(k2 * p2 * 32);
|
||||
|
||||
if (encode_matrix == NULL || decode_matrix == NULL
|
||||
|| invert_matrix == NULL || temp_matrix == NULL || g_tbls == NULL) {
|
||||
printf("Test failure! Error with malloc\n");
|
||||
return -1;
|
||||
}
|
||||
// Allocate the src fragments
|
||||
for (i = 0; i < k; i++) {
|
||||
if (NULL == (frag_ptrs[i] = malloc(len))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
// Allocate the parity fragments
|
||||
for (i = 0; i < p2; i++) {
|
||||
if (NULL == (parity_ptrs[i] = malloc(len / 2))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
if (encode_matrix == NULL || decode_matrix == NULL || invert_matrix == NULL ||
|
||||
temp_matrix == NULL || g_tbls == NULL) {
|
||||
printf("Test failure! Error with malloc\n");
|
||||
return -1;
|
||||
}
|
||||
// Allocate the src fragments
|
||||
for (i = 0; i < k; i++) {
|
||||
if (NULL == (frag_ptrs[i] = malloc(len))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
// Allocate the parity fragments
|
||||
for (i = 0; i < p2; i++) {
|
||||
if (NULL == (parity_ptrs[i] = malloc(len / 2))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
// Allocate buffers for recovered data
|
||||
for (i = 0; i < p2; i++) {
|
||||
if (NULL == (recover_outp[i] = malloc(len / 2))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
// Allocate buffers for recovered data
|
||||
for (i = 0; i < p2; i++) {
|
||||
if (NULL == (recover_outp[i] = malloc(len / 2))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
// Fill sources with random data
|
||||
for (i = 0; i < k; i++)
|
||||
for (j = 0; j < len; j++)
|
||||
frag_ptrs[i][j] = rand();
|
||||
// Fill sources with random data
|
||||
for (i = 0; i < k; i++)
|
||||
for (j = 0; j < len; j++)
|
||||
frag_ptrs[i][j] = rand();
|
||||
|
||||
printf(" encode (m,k,p)=(%d,%d,%d) len=%d\n", m, k, p, len);
|
||||
printf(" encode (m,k,p)=(%d,%d,%d) len=%d\n", m, k, p, len);
|
||||
|
||||
// Pick an encode matrix.
|
||||
gf_gen_full_pb_cauchy_matrix(encode_matrix, m2, k2);
|
||||
// Pick an encode matrix.
|
||||
gf_gen_full_pb_cauchy_matrix(encode_matrix, m2, k2);
|
||||
|
||||
if (verbose)
|
||||
print_matrix(m2, k2, encode_matrix, "encode matrix");
|
||||
if (verbose)
|
||||
print_matrix(m2, k2, encode_matrix, "encode matrix");
|
||||
|
||||
// Initialize g_tbls from encode matrix
|
||||
ec_init_tables(k2, p2, &encode_matrix[k2 * k2], g_tbls);
|
||||
// Initialize g_tbls from encode matrix
|
||||
ec_init_tables(k2, p2, &encode_matrix[k2 * k2], g_tbls);
|
||||
|
||||
// Fold A and B into single list of fragments
|
||||
for (i = 0; i < k; i++)
|
||||
frag_ptrs[i + k] = &frag_ptrs[i][len / 2];
|
||||
// Fold A and B into single list of fragments
|
||||
for (i = 0; i < k; i++)
|
||||
frag_ptrs[i + k] = &frag_ptrs[i][len / 2];
|
||||
|
||||
if (!sparse_matrix_opt) {
|
||||
// Standard encode using no assumptions on the encode matrix
|
||||
if (!sparse_matrix_opt) {
|
||||
// Standard encode using no assumptions on the encode matrix
|
||||
|
||||
// Generate EC parity blocks from sources
|
||||
ec_encode_data(len / 2, k2, p2, g_tbls, frag_ptrs, parity_ptrs);
|
||||
// Generate EC parity blocks from sources
|
||||
ec_encode_data(len / 2, k2, p2, g_tbls, frag_ptrs, parity_ptrs);
|
||||
|
||||
if (benchmark) {
|
||||
struct perf start;
|
||||
BENCHMARK(&start, BENCHMARK_TIME,
|
||||
ec_encode_data(len / 2, k2, p2, g_tbls, frag_ptrs,
|
||||
parity_ptrs));
|
||||
printf("ec_piggyback_encode_std: ");
|
||||
perf_print(start, m2 * len / 2);
|
||||
}
|
||||
} else {
|
||||
// Sparse matrix optimization - use fact that input matrix is sparse
|
||||
if (benchmark) {
|
||||
struct perf start;
|
||||
BENCHMARK(&start, BENCHMARK_TIME,
|
||||
ec_encode_data(len / 2, k2, p2, g_tbls, frag_ptrs, parity_ptrs));
|
||||
printf("ec_piggyback_encode_std: ");
|
||||
perf_print(start, m2 * len / 2);
|
||||
}
|
||||
} else {
|
||||
// Sparse matrix optimization - use fact that input matrix is sparse
|
||||
|
||||
// Keep an encode matrix with some zero elements removed
|
||||
u8 *encode_matrix_faster, *g_tbls_faster;
|
||||
encode_matrix_faster = malloc(m * k);
|
||||
g_tbls_faster = malloc(k * p * 32);
|
||||
if (encode_matrix_faster == NULL || g_tbls_faster == NULL) {
|
||||
printf("Test failure! Error with malloc\n");
|
||||
return -1;
|
||||
}
|
||||
// Keep an encode matrix with some zero elements removed
|
||||
u8 *encode_matrix_faster, *g_tbls_faster;
|
||||
encode_matrix_faster = malloc(m * k);
|
||||
g_tbls_faster = malloc(k * p * 32);
|
||||
if (encode_matrix_faster == NULL || g_tbls_faster == NULL) {
|
||||
printf("Test failure! Error with malloc\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Pack with only the part that we know are non-zero. Alternatively
|
||||
* we could search and keep track of non-zero elements but for
|
||||
* simplicity we just skip the lower quadrant.
|
||||
*/
|
||||
for (i = k, j = k2; i < m; i++, j++)
|
||||
memcpy(&encode_matrix_faster[k * i], &encode_matrix[k2 * j], k);
|
||||
/*
|
||||
* Pack with only the part that we know are non-zero. Alternatively
|
||||
* we could search and keep track of non-zero elements but for
|
||||
* simplicity we just skip the lower quadrant.
|
||||
*/
|
||||
for (i = k, j = k2; i < m; i++, j++)
|
||||
memcpy(&encode_matrix_faster[k * i], &encode_matrix[k2 * j], k);
|
||||
|
||||
if (verbose) {
|
||||
print_matrix(p, k, &encode_matrix_faster[k * k],
|
||||
"encode via sparse-opt");
|
||||
print_matrix(p2 / 2, k2, &encode_matrix[(k2 + p2 / 2) * k2],
|
||||
"encode via sparse-opt");
|
||||
}
|
||||
// Initialize g_tbls from encode matrix
|
||||
ec_init_tables(k, p, &encode_matrix_faster[k * k], g_tbls_faster);
|
||||
if (verbose) {
|
||||
print_matrix(p, k, &encode_matrix_faster[k * k], "encode via sparse-opt");
|
||||
print_matrix(p2 / 2, k2, &encode_matrix[(k2 + p2 / 2) * k2],
|
||||
"encode via sparse-opt");
|
||||
}
|
||||
// Initialize g_tbls from encode matrix
|
||||
ec_init_tables(k, p, &encode_matrix_faster[k * k], g_tbls_faster);
|
||||
|
||||
// Generate EC parity blocks from sources
|
||||
ec_encode_data(len / 2, k, p, g_tbls_faster, frag_ptrs, parity_ptrs);
|
||||
ec_encode_data(len / 2, k2, p, &g_tbls[k2 * p * 32], frag_ptrs,
|
||||
&parity_ptrs[p]);
|
||||
// Generate EC parity blocks from sources
|
||||
ec_encode_data(len / 2, k, p, g_tbls_faster, frag_ptrs, parity_ptrs);
|
||||
ec_encode_data(len / 2, k2, p, &g_tbls[k2 * p * 32], frag_ptrs, &parity_ptrs[p]);
|
||||
|
||||
if (benchmark) {
|
||||
struct perf start;
|
||||
BENCHMARK(&start, BENCHMARK_TIME,
|
||||
ec_encode_data(len / 2, k, p, g_tbls_faster, frag_ptrs,
|
||||
parity_ptrs);
|
||||
ec_encode_data(len / 2, k2, p, &g_tbls[k2 * p * 32],
|
||||
frag_ptrs, &parity_ptrs[p]));
|
||||
printf("ec_piggyback_encode_sparse: ");
|
||||
perf_print(start, m2 * len / 2);
|
||||
}
|
||||
}
|
||||
if (benchmark) {
|
||||
struct perf start;
|
||||
BENCHMARK(&start, BENCHMARK_TIME,
|
||||
ec_encode_data(len / 2, k, p, g_tbls_faster, frag_ptrs,
|
||||
parity_ptrs);
|
||||
ec_encode_data(len / 2, k2, p, &g_tbls[k2 * p * 32], frag_ptrs,
|
||||
&parity_ptrs[p]));
|
||||
printf("ec_piggyback_encode_sparse: ");
|
||||
perf_print(start, m2 * len / 2);
|
||||
}
|
||||
}
|
||||
|
||||
if (nerrs <= 0)
|
||||
return 0;
|
||||
if (nerrs <= 0)
|
||||
return 0;
|
||||
|
||||
printf(" recover %d fragments\n", nerrs);
|
||||
printf(" recover %d fragments\n", nerrs);
|
||||
|
||||
// Set frag pointers to correspond to parity
|
||||
for (i = k2; i < m2; i++)
|
||||
frag_ptrs[i] = parity_ptrs[i - k2];
|
||||
// Set frag pointers to correspond to parity
|
||||
for (i = k2; i < m2; i++)
|
||||
frag_ptrs[i] = parity_ptrs[i - k2];
|
||||
|
||||
print_list(nerrs2, frag_err_list, " frag err list");
|
||||
print_list(nerrs2, frag_err_list, " frag err list");
|
||||
|
||||
// Find a decode matrix to regenerate all erasures from remaining frags
|
||||
ret = gf_gen_decode_matrix(encode_matrix, decode_matrix,
|
||||
invert_matrix, temp_matrix, decode_index, frag_err_list,
|
||||
nerrs2, k2, m2);
|
||||
// Find a decode matrix to regenerate all erasures from remaining frags
|
||||
ret = gf_gen_decode_matrix(encode_matrix, decode_matrix, invert_matrix, temp_matrix,
|
||||
decode_index, frag_err_list, nerrs2, k2, m2);
|
||||
|
||||
if (ret != 0) {
|
||||
printf("Fail on generate decode matrix\n");
|
||||
return -1;
|
||||
}
|
||||
// Pack recovery array pointers as list of valid fragments
|
||||
for (i = 0; i < k2; i++)
|
||||
if (decode_index[i] < k2)
|
||||
recover_srcs[i] = frag_ptrs[decode_index[i]];
|
||||
else
|
||||
recover_srcs[i] = parity_ptrs[decode_index[i] - k2];
|
||||
if (ret != 0) {
|
||||
printf("Fail on generate decode matrix\n");
|
||||
return -1;
|
||||
}
|
||||
// Pack recovery array pointers as list of valid fragments
|
||||
for (i = 0; i < k2; i++)
|
||||
if (decode_index[i] < k2)
|
||||
recover_srcs[i] = frag_ptrs[decode_index[i]];
|
||||
else
|
||||
recover_srcs[i] = parity_ptrs[decode_index[i] - k2];
|
||||
|
||||
print_list(k2, decode_index, " decode index");
|
||||
print_list(k2, decode_index, " decode index");
|
||||
|
||||
// Recover data
|
||||
ec_init_tables(k2, nerrs2, decode_matrix, g_tbls);
|
||||
ec_encode_data(len / 2, k2, nerrs2, g_tbls, recover_srcs, recover_outp);
|
||||
// Recover data
|
||||
ec_init_tables(k2, nerrs2, decode_matrix, g_tbls);
|
||||
ec_encode_data(len / 2, k2, nerrs2, g_tbls, recover_srcs, recover_outp);
|
||||
|
||||
if (benchmark) {
|
||||
struct perf start;
|
||||
BENCHMARK(&start, BENCHMARK_TIME,
|
||||
ec_encode_data(len / 2, k2, nerrs2, g_tbls, recover_srcs,
|
||||
recover_outp));
|
||||
printf("ec_piggyback_decode: ");
|
||||
perf_print(start, (k2 + nerrs2) * len / 2);
|
||||
}
|
||||
// Check that recovered buffers are the same as original
|
||||
printf(" check recovery of block {");
|
||||
for (i = 0; i < nerrs2; i++) {
|
||||
printf(" %d", frag_err_list[i]);
|
||||
if (memcmp(recover_outp[i], frag_ptrs[frag_err_list[i]], len / 2)) {
|
||||
printf(" Fail erasure recovery %d, frag %d\n", i, frag_err_list[i]);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
printf(" } done all: Pass\n");
|
||||
if (benchmark) {
|
||||
struct perf start;
|
||||
BENCHMARK(&start, BENCHMARK_TIME,
|
||||
ec_encode_data(len / 2, k2, nerrs2, g_tbls, recover_srcs, recover_outp));
|
||||
printf("ec_piggyback_decode: ");
|
||||
perf_print(start, (k2 + nerrs2) * len / 2);
|
||||
}
|
||||
// Check that recovered buffers are the same as original
|
||||
printf(" check recovery of block {");
|
||||
for (i = 0; i < nerrs2; i++) {
|
||||
printf(" %d", frag_err_list[i]);
|
||||
if (memcmp(recover_outp[i], frag_ptrs[frag_err_list[i]], len / 2)) {
|
||||
printf(" Fail erasure recovery %d, frag %d\n", i, frag_err_list[i]);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
printf(" } done all: Pass\n");
|
||||
|
||||
return 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Generate decode matrix from encode matrix and erasure list
|
||||
|
||||
static int gf_gen_decode_matrix(u8 * encode_matrix,
|
||||
u8 * decode_matrix,
|
||||
u8 * invert_matrix,
|
||||
u8 * temp_matrix,
|
||||
u8 * decode_index, u8 * frag_err_list, int nerrs, int k, int m)
|
||||
static int
|
||||
gf_gen_decode_matrix(u8 *encode_matrix, u8 *decode_matrix, u8 *invert_matrix, u8 *temp_matrix,
|
||||
u8 *decode_index, u8 *frag_err_list, int nerrs, int k, int m)
|
||||
{
|
||||
int i, j, p, r;
|
||||
int nsrcerrs = 0;
|
||||
u8 s, *b = temp_matrix;
|
||||
u8 frag_in_err[MMAX];
|
||||
int i, j, p, r;
|
||||
int nsrcerrs = 0;
|
||||
u8 s, *b = temp_matrix;
|
||||
u8 frag_in_err[MMAX];
|
||||
|
||||
memset(frag_in_err, 0, sizeof(frag_in_err));
|
||||
memset(frag_in_err, 0, sizeof(frag_in_err));
|
||||
|
||||
// Order the fragments in erasure for easier sorting
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] < k)
|
||||
nsrcerrs++;
|
||||
frag_in_err[frag_err_list[i]] = 1;
|
||||
}
|
||||
// Order the fragments in erasure for easier sorting
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] < k)
|
||||
nsrcerrs++;
|
||||
frag_in_err[frag_err_list[i]] = 1;
|
||||
}
|
||||
|
||||
// Construct b (matrix that encoded remaining frags) by removing erased rows
|
||||
for (i = 0, r = 0; i < k; i++, r++) {
|
||||
while (frag_in_err[r])
|
||||
r++;
|
||||
for (j = 0; j < k; j++)
|
||||
b[k * i + j] = encode_matrix[k * r + j];
|
||||
decode_index[i] = r;
|
||||
}
|
||||
if (verbose > 1)
|
||||
print_matrix(k, k, b, "matrix to invert");
|
||||
// Construct b (matrix that encoded remaining frags) by removing erased rows
|
||||
for (i = 0, r = 0; i < k; i++, r++) {
|
||||
while (frag_in_err[r])
|
||||
r++;
|
||||
for (j = 0; j < k; j++)
|
||||
b[k * i + j] = encode_matrix[k * r + j];
|
||||
decode_index[i] = r;
|
||||
}
|
||||
if (verbose > 1)
|
||||
print_matrix(k, k, b, "matrix to invert");
|
||||
|
||||
// Invert matrix to get recovery matrix
|
||||
if (gf_invert_matrix(b, invert_matrix, k) < 0)
|
||||
return -1;
|
||||
// Invert matrix to get recovery matrix
|
||||
if (gf_invert_matrix(b, invert_matrix, k) < 0)
|
||||
return -1;
|
||||
|
||||
if (verbose > 2)
|
||||
print_matrix(k, k, invert_matrix, "matrix inverted");
|
||||
if (verbose > 2)
|
||||
print_matrix(k, k, invert_matrix, "matrix inverted");
|
||||
|
||||
// Get decode matrix with only wanted recovery rows
|
||||
for (i = 0; i < nsrcerrs; i++) {
|
||||
for (j = 0; j < k; j++) {
|
||||
decode_matrix[k * i + j] = invert_matrix[k * frag_err_list[i] + j];
|
||||
}
|
||||
}
|
||||
// Get decode matrix with only wanted recovery rows
|
||||
for (i = 0; i < nsrcerrs; i++) {
|
||||
for (j = 0; j < k; j++) {
|
||||
decode_matrix[k * i + j] = invert_matrix[k * frag_err_list[i] + j];
|
||||
}
|
||||
}
|
||||
|
||||
// For non-src (parity) erasures need to multiply encode matrix * invert
|
||||
for (p = nsrcerrs; p < nerrs; p++) {
|
||||
for (i = 0; i < k; i++) {
|
||||
s = 0;
|
||||
for (j = 0; j < k; j++)
|
||||
s ^= gf_mul(invert_matrix[j * k + i],
|
||||
encode_matrix[k * frag_err_list[p] + j]);
|
||||
// For non-src (parity) erasures need to multiply encode matrix * invert
|
||||
for (p = nsrcerrs; p < nerrs; p++) {
|
||||
for (i = 0; i < k; i++) {
|
||||
s = 0;
|
||||
for (j = 0; j < k; j++)
|
||||
s ^= gf_mul(invert_matrix[j * k + i],
|
||||
encode_matrix[k * frag_err_list[p] + j]);
|
||||
|
||||
decode_matrix[k * p + i] = s;
|
||||
}
|
||||
}
|
||||
if (verbose > 1)
|
||||
print_matrix(nerrs, k, decode_matrix, "decode matrix");
|
||||
return 0;
|
||||
decode_matrix[k * p + i] = s;
|
||||
}
|
||||
}
|
||||
if (verbose > 1)
|
||||
print_matrix(nerrs, k, decode_matrix, "decode matrix");
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -31,187 +31,186 @@
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <getopt.h>
|
||||
#include "erasure_code.h" // use <isa-l.h> instead when linking against installed
|
||||
#include "erasure_code.h" // use <isa-l.h> instead when linking against installed
|
||||
|
||||
#define MMAX 255
|
||||
#define KMAX 255
|
||||
|
||||
typedef unsigned char u8;
|
||||
|
||||
int usage(void)
|
||||
int
|
||||
usage(void)
|
||||
{
|
||||
fprintf(stderr,
|
||||
"Usage: ec_simple_example [options]\n"
|
||||
" -h Help\n"
|
||||
" -k <val> Number of source fragments\n"
|
||||
" -p <val> Number of parity fragments\n"
|
||||
" -l <val> Length of fragments\n"
|
||||
" -e <val> Simulate erasure on frag index val. Zero based. Can be repeated.\n"
|
||||
" -r <seed> Pick random (k, p) with seed\n");
|
||||
exit(0);
|
||||
fprintf(stderr,
|
||||
"Usage: ec_simple_example [options]\n"
|
||||
" -h Help\n"
|
||||
" -k <val> Number of source fragments\n"
|
||||
" -p <val> Number of parity fragments\n"
|
||||
" -l <val> Length of fragments\n"
|
||||
" -e <val> Simulate erasure on frag index val. Zero based. Can be repeated.\n"
|
||||
" -r <seed> Pick random (k, p) with seed\n");
|
||||
exit(0);
|
||||
}
|
||||
|
||||
static int gf_gen_decode_matrix_simple(u8 * encode_matrix,
|
||||
u8 * decode_matrix,
|
||||
u8 * invert_matrix,
|
||||
u8 * temp_matrix,
|
||||
u8 * decode_index,
|
||||
u8 * frag_err_list, int nerrs, int k, int m);
|
||||
static int
|
||||
gf_gen_decode_matrix_simple(u8 *encode_matrix, u8 *decode_matrix, u8 *invert_matrix,
|
||||
u8 *temp_matrix, u8 *decode_index, u8 *frag_err_list, int nerrs, int k,
|
||||
int m);
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
int i, j, m, c, e, ret;
|
||||
int k = 10, p = 4, len = 8 * 1024; // Default params
|
||||
int nerrs = 0;
|
||||
int i, j, m, c, e, ret;
|
||||
int k = 10, p = 4, len = 8 * 1024; // Default params
|
||||
int nerrs = 0;
|
||||
|
||||
// Fragment buffer pointers
|
||||
u8 *frag_ptrs[MMAX];
|
||||
u8 *recover_srcs[KMAX];
|
||||
u8 *recover_outp[KMAX];
|
||||
u8 frag_err_list[MMAX];
|
||||
// Fragment buffer pointers
|
||||
u8 *frag_ptrs[MMAX];
|
||||
u8 *recover_srcs[KMAX];
|
||||
u8 *recover_outp[KMAX];
|
||||
u8 frag_err_list[MMAX];
|
||||
|
||||
// Coefficient matrices
|
||||
u8 *encode_matrix, *decode_matrix;
|
||||
u8 *invert_matrix, *temp_matrix;
|
||||
u8 *g_tbls;
|
||||
u8 decode_index[MMAX];
|
||||
// Coefficient matrices
|
||||
u8 *encode_matrix, *decode_matrix;
|
||||
u8 *invert_matrix, *temp_matrix;
|
||||
u8 *g_tbls;
|
||||
u8 decode_index[MMAX];
|
||||
|
||||
if (argc == 1)
|
||||
for (i = 0; i < p; i++)
|
||||
frag_err_list[nerrs++] = rand() % (k + p);
|
||||
if (argc == 1)
|
||||
for (i = 0; i < p; i++)
|
||||
frag_err_list[nerrs++] = rand() % (k + p);
|
||||
|
||||
while ((c = getopt(argc, argv, "k:p:l:e:r:h")) != -1) {
|
||||
switch (c) {
|
||||
case 'k':
|
||||
k = atoi(optarg);
|
||||
break;
|
||||
case 'p':
|
||||
p = atoi(optarg);
|
||||
break;
|
||||
case 'l':
|
||||
len = atoi(optarg);
|
||||
if (len < 0)
|
||||
usage();
|
||||
break;
|
||||
case 'e':
|
||||
e = atoi(optarg);
|
||||
frag_err_list[nerrs++] = e;
|
||||
break;
|
||||
case 'r':
|
||||
srand(atoi(optarg));
|
||||
k = (rand() % (MMAX - 1)) + 1; // Pick k {1 to MMAX - 1}
|
||||
p = (rand() % (MMAX - k)) + 1; // Pick p {1 to MMAX - k}
|
||||
while ((c = getopt(argc, argv, "k:p:l:e:r:h")) != -1) {
|
||||
switch (c) {
|
||||
case 'k':
|
||||
k = atoi(optarg);
|
||||
break;
|
||||
case 'p':
|
||||
p = atoi(optarg);
|
||||
break;
|
||||
case 'l':
|
||||
len = atoi(optarg);
|
||||
if (len < 0)
|
||||
usage();
|
||||
break;
|
||||
case 'e':
|
||||
e = atoi(optarg);
|
||||
frag_err_list[nerrs++] = e;
|
||||
break;
|
||||
case 'r':
|
||||
srand(atoi(optarg));
|
||||
k = (rand() % (MMAX - 1)) + 1; // Pick k {1 to MMAX - 1}
|
||||
p = (rand() % (MMAX - k)) + 1; // Pick p {1 to MMAX - k}
|
||||
|
||||
for (i = 0; i < k + p && nerrs < p; i++)
|
||||
if (rand() & 1)
|
||||
frag_err_list[nerrs++] = i;
|
||||
break;
|
||||
case 'h':
|
||||
default:
|
||||
usage();
|
||||
break;
|
||||
}
|
||||
}
|
||||
m = k + p;
|
||||
for (i = 0; i < k + p && nerrs < p; i++)
|
||||
if (rand() & 1)
|
||||
frag_err_list[nerrs++] = i;
|
||||
break;
|
||||
case 'h':
|
||||
default:
|
||||
usage();
|
||||
break;
|
||||
}
|
||||
}
|
||||
m = k + p;
|
||||
|
||||
// Check for valid parameters
|
||||
if (m > MMAX || k > KMAX || m < 0 || p < 1 || k < 1) {
|
||||
printf(" Input test parameter error m=%d, k=%d, p=%d, erasures=%d\n",
|
||||
m, k, p, nerrs);
|
||||
usage();
|
||||
}
|
||||
if (nerrs > p) {
|
||||
printf(" Number of erasures chosen exceeds power of code erasures=%d p=%d\n",
|
||||
nerrs, p);
|
||||
usage();
|
||||
}
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] >= m) {
|
||||
printf(" fragment %d not in range\n", frag_err_list[i]);
|
||||
usage();
|
||||
}
|
||||
}
|
||||
// Check for valid parameters
|
||||
if (m > MMAX || k > KMAX || m < 0 || p < 1 || k < 1) {
|
||||
printf(" Input test parameter error m=%d, k=%d, p=%d, erasures=%d\n", m, k, p,
|
||||
nerrs);
|
||||
usage();
|
||||
}
|
||||
if (nerrs > p) {
|
||||
printf(" Number of erasures chosen exceeds power of code erasures=%d p=%d\n", nerrs,
|
||||
p);
|
||||
usage();
|
||||
}
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] >= m) {
|
||||
printf(" fragment %d not in range\n", frag_err_list[i]);
|
||||
usage();
|
||||
}
|
||||
}
|
||||
|
||||
printf("ec_simple_example:\n");
|
||||
printf("ec_simple_example:\n");
|
||||
|
||||
// Allocate coding matrices
|
||||
encode_matrix = malloc(m * k);
|
||||
decode_matrix = malloc(m * k);
|
||||
invert_matrix = malloc(m * k);
|
||||
temp_matrix = malloc(m * k);
|
||||
g_tbls = malloc(k * p * 32);
|
||||
// Allocate coding matrices
|
||||
encode_matrix = malloc(m * k);
|
||||
decode_matrix = malloc(m * k);
|
||||
invert_matrix = malloc(m * k);
|
||||
temp_matrix = malloc(m * k);
|
||||
g_tbls = malloc(k * p * 32);
|
||||
|
||||
if (encode_matrix == NULL || decode_matrix == NULL
|
||||
|| invert_matrix == NULL || temp_matrix == NULL || g_tbls == NULL) {
|
||||
printf("Test failure! Error with malloc\n");
|
||||
return -1;
|
||||
}
|
||||
// Allocate the src & parity buffers
|
||||
for (i = 0; i < m; i++) {
|
||||
if (NULL == (frag_ptrs[i] = malloc(len))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
if (encode_matrix == NULL || decode_matrix == NULL || invert_matrix == NULL ||
|
||||
temp_matrix == NULL || g_tbls == NULL) {
|
||||
printf("Test failure! Error with malloc\n");
|
||||
return -1;
|
||||
}
|
||||
// Allocate the src & parity buffers
|
||||
for (i = 0; i < m; i++) {
|
||||
if (NULL == (frag_ptrs[i] = malloc(len))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
// Allocate buffers for recovered data
|
||||
for (i = 0; i < p; i++) {
|
||||
if (NULL == (recover_outp[i] = malloc(len))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
// Allocate buffers for recovered data
|
||||
for (i = 0; i < p; i++) {
|
||||
if (NULL == (recover_outp[i] = malloc(len))) {
|
||||
printf("alloc error: Fail\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
// Fill sources with random data
|
||||
for (i = 0; i < k; i++)
|
||||
for (j = 0; j < len; j++)
|
||||
frag_ptrs[i][j] = rand();
|
||||
// Fill sources with random data
|
||||
for (i = 0; i < k; i++)
|
||||
for (j = 0; j < len; j++)
|
||||
frag_ptrs[i][j] = rand();
|
||||
|
||||
printf(" encode (m,k,p)=(%d,%d,%d) len=%d\n", m, k, p, len);
|
||||
printf(" encode (m,k,p)=(%d,%d,%d) len=%d\n", m, k, p, len);
|
||||
|
||||
// Pick an encode matrix. A Cauchy matrix is a good choice as even
|
||||
// large k are always invertable keeping the recovery rule simple.
|
||||
gf_gen_cauchy1_matrix(encode_matrix, m, k);
|
||||
// Pick an encode matrix. A Cauchy matrix is a good choice as even
|
||||
// large k are always invertable keeping the recovery rule simple.
|
||||
gf_gen_cauchy1_matrix(encode_matrix, m, k);
|
||||
|
||||
// Initialize g_tbls from encode matrix
|
||||
ec_init_tables(k, p, &encode_matrix[k * k], g_tbls);
|
||||
// Initialize g_tbls from encode matrix
|
||||
ec_init_tables(k, p, &encode_matrix[k * k], g_tbls);
|
||||
|
||||
// Generate EC parity blocks from sources
|
||||
ec_encode_data(len, k, p, g_tbls, frag_ptrs, &frag_ptrs[k]);
|
||||
// Generate EC parity blocks from sources
|
||||
ec_encode_data(len, k, p, g_tbls, frag_ptrs, &frag_ptrs[k]);
|
||||
|
||||
if (nerrs <= 0)
|
||||
return 0;
|
||||
if (nerrs <= 0)
|
||||
return 0;
|
||||
|
||||
printf(" recover %d fragments\n", nerrs);
|
||||
printf(" recover %d fragments\n", nerrs);
|
||||
|
||||
// Find a decode matrix to regenerate all erasures from remaining frags
|
||||
ret = gf_gen_decode_matrix_simple(encode_matrix, decode_matrix,
|
||||
invert_matrix, temp_matrix, decode_index,
|
||||
frag_err_list, nerrs, k, m);
|
||||
if (ret != 0) {
|
||||
printf("Fail on generate decode matrix\n");
|
||||
return -1;
|
||||
}
|
||||
// Pack recovery array pointers as list of valid fragments
|
||||
for (i = 0; i < k; i++)
|
||||
recover_srcs[i] = frag_ptrs[decode_index[i]];
|
||||
// Find a decode matrix to regenerate all erasures from remaining frags
|
||||
ret = gf_gen_decode_matrix_simple(encode_matrix, decode_matrix, invert_matrix, temp_matrix,
|
||||
decode_index, frag_err_list, nerrs, k, m);
|
||||
if (ret != 0) {
|
||||
printf("Fail on generate decode matrix\n");
|
||||
return -1;
|
||||
}
|
||||
// Pack recovery array pointers as list of valid fragments
|
||||
for (i = 0; i < k; i++)
|
||||
recover_srcs[i] = frag_ptrs[decode_index[i]];
|
||||
|
||||
// Recover data
|
||||
ec_init_tables(k, nerrs, decode_matrix, g_tbls);
|
||||
ec_encode_data(len, k, nerrs, g_tbls, recover_srcs, recover_outp);
|
||||
// Recover data
|
||||
ec_init_tables(k, nerrs, decode_matrix, g_tbls);
|
||||
ec_encode_data(len, k, nerrs, g_tbls, recover_srcs, recover_outp);
|
||||
|
||||
// Check that recovered buffers are the same as original
|
||||
printf(" check recovery of block {");
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
printf(" %d", frag_err_list[i]);
|
||||
if (memcmp(recover_outp[i], frag_ptrs[frag_err_list[i]], len)) {
|
||||
printf(" Fail erasure recovery %d, frag %d\n", i, frag_err_list[i]);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
// Check that recovered buffers are the same as original
|
||||
printf(" check recovery of block {");
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
printf(" %d", frag_err_list[i]);
|
||||
if (memcmp(recover_outp[i], frag_ptrs[frag_err_list[i]], len)) {
|
||||
printf(" Fail erasure recovery %d, frag %d\n", i, frag_err_list[i]);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
printf(" } done all: Pass\n");
|
||||
return 0;
|
||||
printf(" } done all: Pass\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -219,59 +218,56 @@ int main(int argc, char *argv[])
|
||||
*
|
||||
*/
|
||||
|
||||
static int gf_gen_decode_matrix_simple(u8 * encode_matrix,
|
||||
u8 * decode_matrix,
|
||||
u8 * invert_matrix,
|
||||
u8 * temp_matrix,
|
||||
u8 * decode_index, u8 * frag_err_list, int nerrs, int k,
|
||||
int m)
|
||||
static int
|
||||
gf_gen_decode_matrix_simple(u8 *encode_matrix, u8 *decode_matrix, u8 *invert_matrix,
|
||||
u8 *temp_matrix, u8 *decode_index, u8 *frag_err_list, int nerrs, int k,
|
||||
int m)
|
||||
{
|
||||
int i, j, p, r;
|
||||
int nsrcerrs = 0;
|
||||
u8 s, *b = temp_matrix;
|
||||
u8 frag_in_err[MMAX];
|
||||
int i, j, p, r;
|
||||
int nsrcerrs = 0;
|
||||
u8 s, *b = temp_matrix;
|
||||
u8 frag_in_err[MMAX];
|
||||
|
||||
memset(frag_in_err, 0, sizeof(frag_in_err));
|
||||
memset(frag_in_err, 0, sizeof(frag_in_err));
|
||||
|
||||
// Order the fragments in erasure for easier sorting
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] < k)
|
||||
nsrcerrs++;
|
||||
frag_in_err[frag_err_list[i]] = 1;
|
||||
}
|
||||
// Order the fragments in erasure for easier sorting
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] < k)
|
||||
nsrcerrs++;
|
||||
frag_in_err[frag_err_list[i]] = 1;
|
||||
}
|
||||
|
||||
// Construct b (matrix that encoded remaining frags) by removing erased rows
|
||||
for (i = 0, r = 0; i < k; i++, r++) {
|
||||
while (frag_in_err[r])
|
||||
r++;
|
||||
for (j = 0; j < k; j++)
|
||||
b[k * i + j] = encode_matrix[k * r + j];
|
||||
decode_index[i] = r;
|
||||
}
|
||||
// Construct b (matrix that encoded remaining frags) by removing erased rows
|
||||
for (i = 0, r = 0; i < k; i++, r++) {
|
||||
while (frag_in_err[r])
|
||||
r++;
|
||||
for (j = 0; j < k; j++)
|
||||
b[k * i + j] = encode_matrix[k * r + j];
|
||||
decode_index[i] = r;
|
||||
}
|
||||
|
||||
// Invert matrix to get recovery matrix
|
||||
if (gf_invert_matrix(b, invert_matrix, k) < 0)
|
||||
return -1;
|
||||
// Invert matrix to get recovery matrix
|
||||
if (gf_invert_matrix(b, invert_matrix, k) < 0)
|
||||
return -1;
|
||||
|
||||
// Get decode matrix with only wanted recovery rows
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] < k) // A src err
|
||||
for (j = 0; j < k; j++)
|
||||
decode_matrix[k * i + j] =
|
||||
invert_matrix[k * frag_err_list[i] + j];
|
||||
}
|
||||
// Get decode matrix with only wanted recovery rows
|
||||
for (i = 0; i < nerrs; i++) {
|
||||
if (frag_err_list[i] < k) // A src err
|
||||
for (j = 0; j < k; j++)
|
||||
decode_matrix[k * i + j] = invert_matrix[k * frag_err_list[i] + j];
|
||||
}
|
||||
|
||||
// For non-src (parity) erasures need to multiply encode matrix * invert
|
||||
for (p = 0; p < nerrs; p++) {
|
||||
if (frag_err_list[p] >= k) { // A parity err
|
||||
for (i = 0; i < k; i++) {
|
||||
s = 0;
|
||||
for (j = 0; j < k; j++)
|
||||
s ^= gf_mul(invert_matrix[j * k + i],
|
||||
encode_matrix[k * frag_err_list[p] + j]);
|
||||
decode_matrix[k * p + i] = s;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
// For non-src (parity) erasures need to multiply encode matrix * invert
|
||||
for (p = 0; p < nerrs; p++) {
|
||||
if (frag_err_list[p] >= k) { // A parity err
|
||||
for (i = 0; i < k; i++) {
|
||||
s = 0;
|
||||
for (j = 0; j < k; j++)
|
||||
s ^= gf_mul(invert_matrix[j * k + i],
|
||||
encode_matrix[k * frag_err_list[p] + j]);
|
||||
decode_matrix[k * p + i] = s;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user