diff options
Diffstat (limited to 'TamTamMini.activity/common/Util/Clooper/ttest.c')
-rw-r--r-- | TamTamMini.activity/common/Util/Clooper/ttest.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/TamTamMini.activity/common/Util/Clooper/ttest.c b/TamTamMini.activity/common/Util/Clooper/ttest.c new file mode 100644 index 0000000..9ff3d85 --- /dev/null +++ b/TamTamMini.activity/common/Util/Clooper/ttest.c @@ -0,0 +1,53 @@ + +#include <pthread.h> +#include <stdio.h> +#include <time.h> +#include <unistd.h> +#include <sys/time.h> + +double sleeptime = 0.0; +int usleep(int); +static void * threadfn(void * _arg) +{ + double pytime(const struct timeval * tv) + { + return (double) tv->tv_sec + (double) tv->tv_usec / 1000000.0; + } + struct timeval tv0, tv1; + double m = 0.0; + + int loops = 0; + + while (1) + { + gettimeofday(&tv0, 0); + usleep( (int) (sleeptime * 1000000) ); + gettimeofday(&tv1, 0); + double t0 = pytime(&tv0); + double t1 = pytime(&tv1); + if (t1 - t0 > 1.2 * sleeptime) + { + fprintf(stderr, "critical lagginess %lf\n", t1 - t0); + } + if (m < t1 - t0) + { + m = t1 - t0; + fprintf(stderr, "maximum lag %lf\n", m); + } + + if ( ( loops % 100 ) == 0 ) + { + fprintf(stderr, "loop (%lf)\n", t0); + } + ++loops; + } + return NULL; +} +void testtimer(double st) +{ + pthread_t pth; + sleeptime = st; + + pthread_create( &pth, NULL, &threadfn, NULL ); +} + |