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19 lines
415 B
C
19 lines
415 B
C
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#include <stdio.h>
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#include <sys/types.h>
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long long cpucycles_amd64tscfreq(void)
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{
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unsigned long long result;
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asm volatile(".byte 15;.byte 49;shlq $32,%%rdx;orq %%rdx,%%rax"
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: "=a" (result) :: "%rdx");
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return result;
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}
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long long cpucycles_amd64tscfreq_persecond(void)
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{
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long result = 0;
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size_t resultlen = sizeof(long);
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sysctlbyname("machdep.tsc_freq",&result,&resultlen,0,0);
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return result;
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}
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