diff options
Diffstat (limited to 'perf_ev_open.c')
| -rw-r--r-- | perf_ev_open.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/perf_ev_open.c b/perf_ev_open.c index 9b06586..bfc2fcd 100644 --- a/perf_ev_open.c +++ b/perf_ev_open.c @@ -17,6 +17,7 @@ #include <sys/syscall.h> #include <linux/perf_event.h> #include <getopt.h> +#include <math.h> static int fddev = -1; @@ -81,7 +82,7 @@ int main(int ac, char *argv[]) int len = -1, cnt = -1; int *a = NULL; int *b = NULL; - int i, result, sum = 0; + int i, pre_loop_res, post_loop_res, sum = 0; while ((option = getopt(ac, argv, "c:n:")) != -1) { switch (option) { @@ -126,9 +127,9 @@ int main(int ac, char *argv[]) time_end = cpucycles(); /* ---------------------------------- */ - result = (time_end-time_start)/1000; + pre_loop_res = abs(time_end-time_start)/1000; printf("\nsum=%d Avg count [ Loop + Read ] = %ld\n", sum, - (time_end-time_start)/1000); + pre_loop_res); time_start = time_end = 0; /* --------------------Critical section-------------- */ time_start = cpucycles(); @@ -137,10 +138,11 @@ int main(int ac, char *argv[]) time_end = cpucycles(); /* ---------------------------------- */ + post_loop_res = abs(time_end-time_start)/1000; printf("sum=%d Avg count [ Loop ] = %ld\n", sum, - (time_end-time_start)/1000); + post_loop_res); printf("\n--------------------------------------------------------\n"); - printf("\tDelay[cpucycles]=%d", result-((time_end-time_start)/1000)); + printf("\tDelay[cpucycles]=%d\n", abs(post_loop_res - pre_loop_res)); printf("\n--------------------------------------------------------\n"); free(a); free(b); |