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Improve benchmarking tool, add a few math benchmarks.

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Change-Id: I641305dd0e4ac0705381e735ed1604c5be7aa536
This commit is contained in:
Elliott Hughes
2013-02-06 15:47:09 -08:00
parent d10a5a02d1
commit 9edb3e004b
5 changed files with 112 additions and 25 deletions
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30
tests/string_benchmark.cpp
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@@ -26,7 +26,7 @@
// TODO: test unaligned operation too? (currently everything will be 8-byte aligned by malloc.)
static void BM_memcmp(int iters, int nbytes) {
static void BM_string_memcmp(int iters, int nbytes) {
StopBenchmarkTiming();
char* src = new char[nbytes]; char* dst = new char[nbytes];
memset(src, 'x', nbytes);
@@ -34,7 +34,7 @@ static void BM_memcmp(int iters, int nbytes) {
StartBenchmarkTiming();
volatile int c __attribute__((unused)) = 0;
for (int i = 0; i < iters; i++) {
for (int i = 0; i < iters; ++i) {
c += memcmp(dst, src, nbytes);
}
@@ -43,15 +43,15 @@ static void BM_memcmp(int iters, int nbytes) {
delete[] src;
delete[] dst;
}
BENCHMARK(BM_memcmp)->AT_COMMON_SIZES;
BENCHMARK(BM_string_memcmp)->AT_COMMON_SIZES;
static void BM_memcpy(int iters, int nbytes) {
static void BM_string_memcpy(int iters, int nbytes) {
StopBenchmarkTiming();
char* src = new char[nbytes]; char* dst = new char[nbytes];
memset(src, 'x', nbytes);
StartBenchmarkTiming();
for (int i = 0; i < iters; i++) {
for (int i = 0; i < iters; ++i) {
memcpy(dst, src, nbytes);
}
@@ -60,15 +60,15 @@ static void BM_memcpy(int iters, int nbytes) {
delete[] src;
delete[] dst;
}
BENCHMARK(BM_memcpy)->AT_COMMON_SIZES;
BENCHMARK(BM_string_memcpy)->AT_COMMON_SIZES;
static void BM_memmove(int iters, int nbytes) {
static void BM_string_memmove(int iters, int nbytes) {
StopBenchmarkTiming();
char* buf = new char[nbytes + 64];
memset(buf, 'x', nbytes + 64);
StartBenchmarkTiming();
for (int i = 0; i < iters; i++) {
for (int i = 0; i < iters; ++i) {
memmove(buf, buf + 1, nbytes); // Worst-case overlap.
}
@@ -76,14 +76,14 @@ static void BM_memmove(int iters, int nbytes) {
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] buf;
}
BENCHMARK(BM_memmove)->AT_COMMON_SIZES;
BENCHMARK(BM_string_memmove)->AT_COMMON_SIZES;
static void BM_memset(int iters, int nbytes) {
static void BM_string_memset(int iters, int nbytes) {
StopBenchmarkTiming();
char* dst = new char[nbytes];
StartBenchmarkTiming();
for (int i = 0; i < iters; i++) {
for (int i = 0; i < iters; ++i) {
memset(dst, 0, nbytes);
}
@@ -91,9 +91,9 @@ static void BM_memset(int iters, int nbytes) {
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] dst;
}
BENCHMARK(BM_memset)->AT_COMMON_SIZES;
BENCHMARK(BM_string_memset)->AT_COMMON_SIZES;
static void BM_strlen(int iters, int nbytes) {
static void BM_string_strlen(int iters, int nbytes) {
StopBenchmarkTiming();
char* s = new char[nbytes];
memset(s, 'x', nbytes);
@@ -101,7 +101,7 @@ static void BM_strlen(int iters, int nbytes) {
StartBenchmarkTiming();
volatile int c __attribute__((unused)) = 0;
for (int i = 0; i < iters; i++) {
for (int i = 0; i < iters; ++i) {
c += strlen(s);
}
@@ -109,4 +109,4 @@ static void BM_strlen(int iters, int nbytes) {
SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(nbytes));
delete[] s;
}
BENCHMARK(BM_strlen)->AT_COMMON_SIZES;
BENCHMARK(BM_string_strlen)->AT_COMMON_SIZES;