diff options
| -rw-r--r-- | test/perf/linux/getpid_benchmark.cc | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/perf/linux/getpid_benchmark.cc b/test/perf/linux/getpid_benchmark.cc index db74cb264..047a034bd 100644 --- a/test/perf/linux/getpid_benchmark.cc +++ b/test/perf/linux/getpid_benchmark.cc @@ -31,6 +31,24 @@ void BM_Getpid(benchmark::State& state) { BENCHMARK(BM_Getpid); +#ifdef __x86_64__ + +#define SYSNO_STR1(x) #x +#define SYSNO_STR(x) SYSNO_STR1(x) + +// BM_GetpidOpt uses the most often pattern of calling system calls: +// mov $SYS_XXX, %eax; syscall. +void BM_GetpidOpt(benchmark::State& state) { + for (auto s : state) { + __asm__("movl $" SYSNO_STR(SYS_getpid) ", %%eax\n" + "syscall\n" + : : : "rax", "rcx", "r11"); + } +} + +BENCHMARK(BM_GetpidOpt); +#endif // __x86_64__ + } // namespace } // namespace testing |