rdtsc.c
上传用户:wudi5211
上传日期:2010-01-21
资源大小:607k
文件大小:1k
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #define rdtsc(dest)
- __asm__ __volatile__("nop; mfc0 %0,$9; nop" : "=r" (dest))
- int main(int argc, char **argv)
- {
- unsigned int count1,count2,count3,fix;
- printf("rdtsc demo (using mfc0 on mips)n");
- rdtsc(count1);
- rdtsc(count2);
- fix = count2-count1;
- rdtsc(count1);
- printf("rdtsc() took %5ui cyclesn",fix);
- rdtsc(count2);
- printf("printf() took %5ui cyclesn",count2-count1-fix);
- rdtsc(count1);
- sleep(0);
- rdtsc(count2);
- printf("sleep(0) took %5ui cyclesn",count1-count1-fix);
- rdtsc(count1);
- sleep(1);
- rdtsc(count2);
- printf("sleep(1) took %5ui cyclesn",count1-count1-fix);
- return 0;
- }