Fix querying L3 cache size on osx-x64 (#75870)

Co-authored-by: Filip Navara <navara@emclient.com>

Author: github-actions[bot]

src/coreclr/gc/unix/gcenv.unix.cpp

@@ -968,10 +968,11 @@ static size_t GetLogicalProcessorCacheSizeFromOS()
         int64_t cacheSizeFromSysctl = 0;
         size_t sz = sizeof(cacheSizeFromSysctl);
         const bool success = false
-            // macOS-arm64: Since macOS 12.0, Apple added ".perflevelX." to determinate cache sizes for efficiency
+            // macOS: Since macOS 12.0, Apple added ".perflevelX." to determinate cache sizes for efficiency
             // and performance cores separately. "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: these report cache sizes for efficiency cores only:
             || sysctlbyname("hw.l3cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
             || sysctlbyname("hw.l2cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
             || sysctlbyname("hw.l1dcachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0;

src/coreclr/pal/src/misc/sysinfo.cpp

@@ -636,10 +636,11 @@ PAL_GetLogicalProcessorCacheSizeFromOS()
         int64_t cacheSizeFromSysctl = 0;
         size_t sz = sizeof(cacheSizeFromSysctl);
         const bool success = false
-            // macOS-arm64: Since macOS 12.0, Apple added ".perflevelX." to determinate cache sizes for efficiency
+            // macOS: Since macOS 12.0, Apple added ".perflevelX." to determinate cache sizes for efficiency
             // and performance cores separately. "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: these report cache sizes for efficiency cores only:
             || sysctlbyname("hw.l3cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
             || sysctlbyname("hw.l2cachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0
             || sysctlbyname("hw.l1dcachesize", &cacheSizeFromSysctl, &sz, nullptr, 0) == 0;