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Fix LLC cache issue on Apple M1 #64576

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Merged
EgorBo merged 3 commits into from
Feb 1, 2022
Merged

Fix LLC cache issue on Apple M1 #64576

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8c84f7e
Better way to get LLC size on Apple M1 (macOS 12.0+)
EgorBo Jan 31, 2022
dde8edb
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EgorBo Jan 31, 2022
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EgorBo Feb 1, 2022
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@EgorBo
EgorBo committed Jan 31, 2022
commit dde8edb8e2acd2ab3e9bba1a0d2e3830c3fc40c7
5 changes: 3 additions & 2 deletions src/coreclr/pal/src/misc/sysinfo.cpp
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Expand Up @@ -614,11 +614,12 @@ PAL_GetLogicalProcessorCacheSizeFromOS()
int64_t cacheSizeFromSysctl = 0;
size_t sz = sizeof(cacheSizeFromSysctl);
const bool success = false
#if defined(HOST_ARM64) && defined(TARGET_OSX)
// macOS-arm64: Since macOS 12.0, Apple added ".perflevelX." to determinate cache sizes for efficiency
// and performance cores separetely. "perflevel0" stands for "performance"
|| sysctlbyname("hw.perflevel0.l3cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
|| sysctlbyname("hw.perflevel0.l2cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
// macOS-arm64: these report cache sizes for efficiency cores only
// macOS-arm64: these report cache sizes for efficiency cores only:
#endif
|| sysctlbyname("hw.l3cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
|| sysctlbyname("hw.l2cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
|| sysctlbyname("hw.l1dcachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0;
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