45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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/*
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Organization: Technical University of Kosice (TUKE),
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Department: Department of Electronics and Multimedia Telecommunications (DEMT/KEMT),
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Faculties: Faculty of Electrical Engineering and Informatics (FEI),
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Feld of study: Informatics,
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Study program: Computer Networks,
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School year: 3., Bachelor study, 2020/2021,
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Author: Marek Rohac -- MR,
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Compiler: Winlibs GCC -- MinGW-W64 x86_64-posix-seh, built by Brecht Sanders, v. 10.2.0,
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-- also works with GCC 11.1.0
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*/
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#define __USE_MINGW_ANSI_STDIO
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#include<stdio.h>
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#include<windows.h>
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#include <stdint.h>
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//cpucyclesS -- Start measure
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static __inline__ uint64_t cpucyclesS(){
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unsigned cycles_low, cycles_high;
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__asm__ volatile ("CPUID\n\t"
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"RDTSC\n\t"
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"mov %%edx, %0\n\t"
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"mov %%eax, %1\n\t": "=r" (cycles_high), "=r" (cycles_low)::
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"%rax", "%rbx", "%rcx", "%rdx");
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return (((uint64_t)cycles_high << 32) | cycles_low );
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}
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//cpucyclesE -- End measure
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static __inline__ uint64_t cpucyclesE(){
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unsigned cycles_low, cycles_high;
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__asm__ volatile ("RDTSCP\n\t"
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"mov %%edx, %0\n\t"
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"mov %%eax, %1\n\t"
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"CPUID\n\t": "=r" (cycles_high), "=r" (cycles_low)::
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"%rax", "%rbx", "%rcx", "%rdx");
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return (((uint64_t)cycles_high << 32) | cycles_low );
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}
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int main(){
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uint64_t tick,tock;
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tick=cpucyclesS();
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Sleep(1000);
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tock= cpucyclesE() - tick;
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printf("Executed: %llu cycles\n", tock);
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return 0;
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}
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