gcc -o test test.c#include #include #include #include #include #define rdtsc(low,high) __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))timer_t tt;void handler (int sig, siginfo_t * extra, void *cruft)...{static last_i=0;unsigned int i, j;rdtsc(i,j);PRintf ("time:%u, %u, [%u] %uHZ ", j, i, i-last_i, (i-last_i)*10/1000000);last_i = i;}int main ()...{int i=0;sigset_t sigset;sigfillset (&sigset);sigdelset (&sigset, SIGRTMIN);sigprocmask (SIG_SETMASK, &sigset, NULL);struct sigaction sa;sigfillset (&sa.sa_mask);sa.sa_flags = SA_SIGINFO;sa.sa_sigaction = handler;if (sigaction (SIGRTMIN, &sa, NULL) < 0)...{perror ("sigaction failed ");exit (-1);}struct sigevent timer_event;struct itimerspec timer;timer.it_interval.tv_sec = 0;timer.it_interval.tv_nsec = 100 * 1000 * 1000;timer.it_value = timer.it_interval;timer_event.sigev_notify = SIGEV_SIGNAL;timer_event.sigev_signo = SIGRTMIN;timer_event.sigev_value.sival_ptr = (void *) &tt;if (timer_create (CLOCK_REALTIME, &timer_event, &tt) < 0)...{perror ("timer_create failed");exit (-1);}if (timer_settime (tt, 0, &timer, NULL) < 0)...{perror ("timer_settime failed");exit (-1);}while (i++ < 10)...{pause ();}return 0;} |
