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CPUCache (macOS): detect cache line size

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This commit is contained in:
李通洲
2024-06-05 15:48:57 +08:00
parent 1e5a6b2eef
commit e8ddd33614
1 changed files with 7 additions and 4 deletions
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src/detection/cpucache/cpucache_apple.c
+7 -4
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@@ -7,6 +7,9 @@ const char* ffDetectCPUCache(FFCPUCacheResult* result)
uint32_t nPerfLevels = (uint32_t) ffSysctlGetInt("hw.nperflevels", 0);
if (nPerfLevels <= 0) return "sysctl(hw.nperflevels) failed";
// macOS provides the global system cache line size
uint32_t lineSize = (uint32_t) ffSysctlGetInt("hw.cachelinesize", 0);
char sysctlKey[256] = "hw.perflevelN.";
char* pNum = sysctlKey + strlen("hw.perflevel");
char* pSubkey = sysctlKey + strlen("hw.perflevelN.");
@@ -23,12 +26,12 @@ const char* ffDetectCPUCache(FFCPUCacheResult* result)
strncpy(pSubkey, "l1icachesize", lenLeft);
uint32_t size = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
if (size)
ffCPUCacheAddItem(result, 1, size, FF_CPU_CACHE_TYPE_INSTRUCTION)->num = ncpu;
ffCPUCacheAddItem(result, 1, size, lineSize, FF_CPU_CACHE_TYPE_INSTRUCTION)->num = ncpu;
strncpy(pSubkey, "l1dcachesize", lenLeft);
size = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
if (size)
ffCPUCacheAddItem(result, 1, size, FF_CPU_CACHE_TYPE_DATA)->num = ncpu;
ffCPUCacheAddItem(result, 1, size, lineSize, FF_CPU_CACHE_TYPE_DATA)->num = ncpu;
strncpy(pSubkey, "l2cachesize", lenLeft);
size = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
@@ -37,7 +40,7 @@ const char* ffDetectCPUCache(FFCPUCacheResult* result)
strncpy(pSubkey, "cpusperl2", lenLeft);
uint32_t cpuSper = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
if (cpuSper)
ffCPUCacheAddItem(result, 2, size, FF_CPU_CACHE_TYPE_UNIFIED)->num = ncpu / cpuSper;
ffCPUCacheAddItem(result, 2, size, lineSize, FF_CPU_CACHE_TYPE_UNIFIED)->num = ncpu / cpuSper;
}
strncpy(pSubkey, "l3cachesize", lenLeft);
@@ -47,7 +50,7 @@ const char* ffDetectCPUCache(FFCPUCacheResult* result)
strncpy(pSubkey, "cpusperl3", lenLeft);
uint32_t cpuSper = (uint32_t) ffSysctlGetInt(sysctlKey, 0);
if (cpuSper)
ffCPUCacheAddItem(result, 3, size, FF_CPU_CACHE_TYPE_UNIFIED)->num = ncpu / cpuSper;
ffCPUCacheAddItem(result, 3, size, lineSize, FF_CPU_CACHE_TYPE_UNIFIED)->num = ncpu / cpuSper;
}
}