3rd-party/linux-kernel-module-cheat
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readme: document rdtsc

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Ciro Santilli
2018-04-15 23:23:40 +01:00
parent 6eae8bb052
commit 24cdcdc756
3 changed files with 37 additions and 11 deletions
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kernel_module/user/rdtsc.c
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@@ -16,11 +16,10 @@ Only works in x86_64.
int main(void) {
uintmax_t val;
#if defined(__i386__) || defined(__x86_64__)
/* https://stackoverflow.com/questions/9887839/clock-cycle-count-wth-gcc/9887979 */
val = __rdtsc();
#else
val = 0;
#endif
printf("%jx\n", val);
printf("%ju\n", val);
return EXIT_SUCCESS;
}