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Wrong output from getarch on Apple M4 #5227

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Merged
martin-frbg merged 3 commits into from
Apr 21, 2025
Merged

Wrong output from getarch on Apple M4 #5227

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7b66330
hw.perflevel[01].cpusperl changed to hw.perflevel[01].cpusperl2
Apr 16, 2025
d1c2528
Add L1_DATA_LINESIZE for ifdef __APPLE__
Apr 16, 2025
acef78c
Reset buffer length before every call to sysctlbyname.
Apr 16, 2025
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15 changes: 13 additions & 2 deletions cpuid_arm64.c
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Original file line number Diff line number Diff line change
Expand Up @@ -374,15 +374,20 @@ int detect(void)
}
#else
#ifdef __APPLE__
length64 = sizeof(value64);
sysctlbyname("hw.ncpu",&value64,&length64,NULL,0);
cpulowperf=value64;
length64 = sizeof(value64);
sysctlbyname("hw.nperflevels",&value64,&length64,NULL,0);
if (value64 > 1) {
sysctlbyname("hw.perflevel0.cpusperl",&value64,&length64,NULL,0);
length64 = sizeof(value64);
sysctlbyname("hw.perflevel0.cpusperl2",&value64,&length64,NULL,0);
cpuhiperf=value64;
sysctlbyname("hw.perflevel1.cpusperl",&value64,&length64,NULL,0);
length64 = sizeof(value64);
sysctlbyname("hw.perflevel1.cpusperl2",&value64,&length64,NULL,0);
cpulowperf=value64;
}
length64 = sizeof(value64);
sysctlbyname("hw.cpufamily",&value64,&length64,NULL,0);
if (value64 ==131287967|| value64 == 458787763 ) return CPU_VORTEX; //A12/M1
if (value64 == 3660830781) return CPU_VORTEX; //A15/M2
Expand Down Expand Up @@ -467,6 +472,7 @@ int n=0;
printf("#define NUM_CORES_HP %d\n",cpuhiperf);
#endif
#ifdef __APPLE__
length64 = sizeof(value64);
sysctlbyname("hw.physicalcpu_max",&value,&length,NULL,0);
printf("#define NUM_CORES %d\n",value);
if (cpulowperf >0)
Expand Down Expand Up @@ -698,12 +704,17 @@ void get_cpuconfig(void)
case CPU_VORTEX:
printf("#define VORTEX \n");
#ifdef __APPLE__
length64 = sizeof(value64);
sysctlbyname("hw.l1icachesize",&value64,&length64,NULL,0);
printf("#define L1_CODE_SIZE %lld \n",value64);
length64 = sizeof(value64);
sysctlbyname("hw.cachelinesize",&value64,&length64,NULL,0);
printf("#define L1_CODE_LINESIZE %lld \n",value64);
printf("#define L1_DATA_LINESIZE %lld \n",value64);
length64 = sizeof(value64);
sysctlbyname("hw.l1dcachesize",&value64,&length64,NULL,0);
printf("#define L1_DATA_SIZE %lld \n",value64);
length64 = sizeof(value64);
sysctlbyname("hw.l2cachesize",&value64,&length64,NULL,0);
printf("#define L2_SIZE %lld \n",value64);
#endif
Expand Down
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