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CPU (BSD): detect max / min frequency; detect core count of different core types

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Carter Li
2024-05-18 08:24:46 +08:00
committed by 李通洲
parent 1118c57d8f
commit 90a242a4aa
1 changed files with 56 additions and 0 deletions
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src/detection/cpu/cpu_bsd.c
+56
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@@ -11,6 +11,62 @@ const char* ffDetectCPUImpl(const FFCPUOptions* options, FFCPUResult* cpu)
cpu->coresLogical = cpu->coresPhysical;
cpu->coresOnline = cpu->coresPhysical;
FF_STRBUF_AUTO_DESTROY buffer = ffStrbufCreate();
if (ffSysctlGetString("kern.sched.topology_spec", &buffer) == NULL && buffer.length > 0)
{
// <groups>
// <group level="1" cache-level="3">
// <cpu count="4" mask="f,0,0,0">0, 1, 2, 3</cpu>
// <children>
// <group level="2" cache-level="2">
// <cpu count="2" mask="3,0,0,0">0, 1</cpu>
// <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
// </group>
// <group level="2" cache-level="2">
// <cpu count="2" mask="c,0,0,0">2, 3</cpu>
// <flags><flag name="THREAD">THREAD group</flag><flag name="SMT">SMT group</flag></flags>
// </group>
// </children>
// </group>
// </groups>
uint32_t i = 0;
while (true)
{
i = ffStrbufNextIndexS(&buffer, i, "<flag name=\"THREAD\">THREAD group</flag>"); // Find physical core with hyper-threading enabled
if (i >= buffer.length) break;
cpu->coresPhysical--;
i += (uint32_t) strlen("<flag name=\"THREAD\">THREAD group</flag>");
}
}
uint64_t freq = (uint64_t) -1;
uint32_t ifreq = (uint32_t) -1;
for (uint16_t i = 0; i < cpu->coresLogical; ++i)
{
char key[32];
snprintf(key, sizeof(key), "dev.cpu.%u.freq_levels", i);
if (ffSysctlGetString(key, &buffer) == NULL && buffer.length > 0)
{
// MHz/Watts pairs like: 2501/32000 2187/27125 2000/24000
uint32_t fmax = (uint32_t) strtoul(buffer.chars, NULL, 10);
uint32_t fmin = fmax;
uint32_t i = ffStrbufLastIndexC(&buffer, ' ');
if (i < buffer.length)
fmin = (uint32_t) strtoul(buffer.chars + i + 1, NULL, 10);
if (!(cpu->frequencyMin <= fmin)) cpu->frequencyMin = fmin; // Counting for NaN
if (!(cpu->frequencyMax >= fmax)) cpu->frequencyMax = fmax;
if (freq != fmax)
{
freq = fmax;
++ifreq;
}
if (__builtin_expect(ifreq < sizeof(cpu->coreCounts), true))
cpu->coreCounts[ifreq]++;
}
ffStrbufClear(&buffer);
}
int clockRate = ffSysctlGetInt("hw.clockrate", 0);
cpu->frequencyBase = clockRate <= 0 ? 0.0/0.0 : clockRate / 1000.0;
cpu->temperature = FF_CPU_TEMP_UNSET;