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Merge pull request #3347 from harold-b/macos-timing-fix

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Fix incorrect timings on macOS
This commit is contained in:
Jeroen van Rijn
2024-03-29 10:15:16 +01:00
committed by GitHub
parent d325c8ad23 13b8a5b73d
commit 8899f42478
1 changed files with 12 additions and 11 deletions
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src/timings.cpp
+12 -11
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@@ -33,22 +33,23 @@ gb_internal u64 win32_time_stamp__freq(void) {
#include <mach/mach_time.h> #include <mach/mach_time.h>
gb_internal mach_timebase_info_data_t osx_init_timebase_info(void) {
mach_timebase_info_data_t data;
data.numer = 0;
data.denom = 0;
kern_return_t r = mach_timebase_info(&data);
GB_ASSERT(r == KERN_SUCCESS);
return data;
}
gb_internal u64 osx_time_stamp_time_now(void) { gb_internal u64 osx_time_stamp_time_now(void) {
return mach_absolute_time(); return mach_absolute_time();
} }
gb_internal u64 osx_time_stamp__freq(void) { gb_internal u64 osx_time_stamp__freq(void) {
mach_timebase_info_data_t data; gb_local_persist mach_timebase_info_data_t data = osx_init_timebase_info();
data.numer = 0; return 1000000000ull * cast(u64)data.denom / cast(u64)data.numer;
data.denom = 0;
mach_timebase_info(&data);
#if defined(GB_CPU_ARM)
// NOTE(bill, 2021-02-25): M1 Chip seems to have a different freq count
// TODO(bill): Is this truly correct?
return (1000000llu * cast(u64)data.numer) / cast(u64)data.denom;
#else
return (1000000000llu * cast(u64)data.numer) / cast(u64)data.denom;
#endif
} }
#elif defined(GB_SYSTEM_UNIX) #elif defined(GB_SYSTEM_UNIX)