While the external headers define the API, we could really use this
overview to get users started and point them to examples.
Change-Id: Iba419e61d0d7723e1029a3b6e7259facfeb39522
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
1. Revert "x86: Generate .note.gnu.property section for ELF output"
This reverts commit 8074e3fe1b, which is
a hack to work around the old nasm which doesn't support
section .note.gnu.property note alloc noexec align=8
This hack doesn't work for downstream, like:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=2040091
2. If Intel CET is enabled, require nasm with note section support to
add
section .note.gnu.property note alloc noexec align=N
to assembly codes.
Verified with
$ CC="gcc -Wl,-z,cet-report=error -fcf-protection" CXX="g++ -Wl,-z,cet-report=error -fcf-protection" .../configure x86_64-linux
$ make -j8
on Tiger Lake.
Change-Id: I6d66fe6fd054420d7fde35b1508ca9f09defdeca
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
The goal of this patch is to make isa-l testsuite pass on s390 with
minimal changes to the library. The one and only reason isa-l does not
work on s390 at the moment is that s390 is big-endian, and isa-l
assumes little-endian at a lot of places.
There are two flavors of this: loading/storing integers from/to
memory, and overlapping structs. Loads/stores are already helpfully
wrapped by unaligned.h header, so replace the functions there with
endianness-aware variants. Solve struct member overlap by reversing
their order on big-endian.
Also, fix a couple of usages of uninitialized memory in the testsuite
(found with MemorySanitizer).
Fixes s390x part of #188.
Change-Id: Iaf14a113bd266900192cc8b44212f8a47a8c7753
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
This patch adds Arm (aarch64) SVE [1] variable-length vector assembly support
into ISA-L erasure code library. "Arm designed the Scalable Vector Extension
(SVE) as a next-generation SIMD extension to AArch64. SVE allows flexible
vector length implementations with a range of possible values in CPU
implementations. The vector length can vary from a minimum of 128 bits up to
a maximum of 2048 bits, at 128-bit increments. The SVE design guarantees
that the same application can run on different implementations that support
SVE, without the need to recompile the code. " [3]
Test method:
- This patch was tested on Fujitsu's A64FX [2], and it passed all erasure
code related test cases, including "make checks" , "make test", and
"make perf".
- To ensure code testing coverage, parameters in files (erasure_code/
erasure_code_test.c , erasure_code_update_test.c and gf_vect_mad_test.c)
are modified to cover all _vect versions of _mad_sve() / _dot_prod_sve()
rutines.
Performance improvements over NEON:
In general, SVE benchmarks (bandwidth in MB/s) are 40% ~ 100% higher than NEON
when running _cold style (data uncached and pulled from memory) perfs. This
includes routines of dot_prod, mad, and mul.
Optimization points:
This patch was tuned for the best performance on A64FX. Tuning points being
touched in this patch include:
1) Data prefetch into L2 cache before loading. See _sve.S files.
2) Instruction sequence orchestration. Such as interleaving every two
'ld1b/st1b' instructions with other instructions. See _sve.S files.
3) To improve dest vectors parallelism, in highlevel, running
gf_4vect_dot_prod_sve twice is better than running gf_8vect_dot_prod_sve()
once, and it's also better than running _7vect + _vect, _6vect + _2vect,
and _5vect + _3vect. The similar idea is applied to improve 11 ~ 9 dest
vectors dot product computing as well. The related change can be found
in ec_encode_data_sve() of file:
erasure_code/aarch64/ec_aarch64_highlevel_func.c
Notes:
1) About vector length: A64FX has a vector register length of 512bit. However,
this patchset was written with variable length assembly so it work
automatically on aarch64 machines with any types of SVE vector length,
such as SVE-128, SVE-256, etc..
2) About optimization: Due to differences in microarchitecture and
cache/memory design, to achieve optimum performance on SVE capable CPUs
other than A64FX, it is considered necessary to do microarchitecture-level
tunings on these CPUs.
[1] Introduction to SVE - Arm Developer.
https://developer.arm.com/documentation/102476/latest/
[2] FUJITSU Processor A64FX.
https://www.fujitsu.com/global/products/computing/servers/supercomputer/a64fx/
[3] Introducing SVE.
https://developer.arm.com/documentation/102476/0001/Introducing-SVE
Change-Id: If49eb8a956154d799dcda0ba4c9c6d979f5064a9
Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Github actions checkout changed to pull only a single generated merge
commit instead of the actual PR commit id. This breaks check_format
test for signoff. Pulling history of 2 will include the actual commit
ID.
Change-Id: I7d83871159d24faaf2f8e6086f12173e14cbcf3c
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
New mem_zero_detect function will fail on avx only machines.
Change-Id: I3bca49bff886f9c130c89e8c74b31110e9bac76b
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
micro-optimizations: vpcmpeqb+vpmaskmov is faster than vptest according
to uops.info; make usually untaken branches target forward.
reduce numbers of data dependant branches and code size.
Change-Id: Ie70b4bc99685368e5131f23344348bfaf7c27d3e
Signed-off-by: Nicola Torracca <shark@bitchx.it>
The variable D= can be used to quickly add defines. This sets a null
default so it can only be overridden by the make command line.
fixes#184
Change-Id: I84615174547f36208d6d577c1e30b6fac83139b3
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Instead of using a constant as default zlib header, create the header on the fly. Both zlib
header bytes depend on the wbits and compression level used.
Make sure that ISA-L compression level 0 is advertised as the fastest compression in
both the gzip header (setting xfl flag to 0x04) and the zlib header (as 0, fastest, other levels are 1, fast).
Change-Id: I1f30e4397a0f5fcf6df593c40178e7d6f6c05328
Signed-off-by: Ruben Vorderman <r.h.p.vorderman@lumc.nl>
The file types.h has long been misnamed and overlaps with
functionality in the test helper routines.
Change-Id: I774047d3a0074198b67a6b4e909f1e2ce1938195
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Timing functions are made os-independent with test.h include.
Change-Id: Iab7d6325254d5c32263504efc756dbbe51d77153
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Windows def file was missing an exported ec support function.
Also added path in nmake file to build extra examples.
Change-Id: I59ac1599dcb8cdb45077347c74b57aeca4751c35
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
The osx brew and older linux targets are failing the update.
This removes the older linux builds and change the osx to
take the latest brew that comes with the image instead of
doing a brew update on every build.
Change-Id: Ib1543296a733875c9eff798326b0d45854153923
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Both gcc and clang are showing a warning on this despite the buffer
always being set before use.
Change-Id: I0e8f6b9e3451efe69e49814abc883d49b04f2666
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
The raid functions xor_gen, pq_gen and check functions
must have at least two sources. Fixes#175
Change-Id: I2e4509e037c2b1dc88f3f7449d80f4c763e1e124
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Make changed the interpretation of escaped # in a quote causing
warnings in the test for pthreads.
Change-Id: Ice94116713aea3c3e9725b38232e03f53d6633cc
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Here is the bug report on ceph. https://tracker.ceph.com/issues/48681
Change-Id: Ie1c60a71f28c1a169c8899a621be9bb455f5e244
Signed-off-by: luo rixin <luorixin@huawei.com>
Author of this patch is Taiju Yamada <tyamada@bi.a.u-tokyo.ac.jp>
Re-organized by Jerry Yu <jerry.h.yu@arm.com>
Clang version must be later than 9.x according to https://reviews.llvm.org/D61719
Change-Id: I7516cca17ef4556b828fb6ecfa755e6451052359
Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
Clang has deprecated the option -fsanitize-coverage=trace-pc-guard
for use with fuzzing.
Change-Id: I7fe5da0f57ab44110208d098858b786450a0a5e7
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Clang with sanitizer on was catching on cast of static header.
Switching to uload64 macro for better general solution.
Change-Id: I495d440407bb1773841e2f7cdc48bd95fc1a2df4
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
In the newly added function isal_deflate_process_dict(), a null check
was added to the dictionary struct but was ineffectual because of the
order.
Change-Id: I3b3e70997210794de102b1348e1467295871cee2
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Performance improvement for inflate to skip the time-consuming process of decode
table expansion when the header matches a known common dymanic one such as
produced by level 0 compression.
Change-Id: Ia2550b812a062b7cc2eb1b72bcb609f1a631e40b
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
Previous new crc version missed the update for nmake.
Change-Id: Ie529ee9d70d8d0ab8a8af3bd2720405802180d1e
Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
