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[v1.05] Simplify implementation; we do not need separate x86/ARM nop functions

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Dr-Noob
2024-07-04 21:49:43 +01:00
parent bb3d23e193
commit 17dd9a41d2
5 changed files with 47 additions and 110 deletions
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54
src/common/freq.c
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@@ -29,6 +29,51 @@ perf_event_open(struct perf_event_attr *hw_event, pid_t pid,
return ret;
}
#define INSERT_ASM_ONCE __asm volatile("nop");
#define INSERT_ASM_10_TIMES \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
#define INSERT_ASM_100_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES
#define INSERT_ASM_1000_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
void nop_function(uint64_t iters) {
for (uint64_t i = 0; i < iters; i++) {
INSERT_ASM_1000_TIMES
INSERT_ASM_1000_TIMES
INSERT_ASM_1000_TIMES
INSERT_ASM_1000_TIMES
}
}
// Differences between x86 measure_frequency this measure_max_frequency:
// - measure_frequency employs all cores simultaneously wherease
@@ -52,15 +97,6 @@ int64_t measure_max_frequency(uint32_t core) {
int fd;
int pid = 0;
void (*nop_function)(uint64_t);
#ifdef ARCH_X86
nop_function = nop_function_x86;
#elif ARCH_ARM
// TODO
nop_function = nop_function_arm;
#endif
memset(&pe, 0, sizeof(struct perf_event_attr));
pe.type = PERF_TYPE_HARDWARE;
pe.size = sizeof(struct perf_event_attr);