cpu clock: round up when dividing by samples

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/gettime.c b/gettime.c
index df42c29c41b71a0c7c499d8d60d429c7e82f393c..1ba18e99877f3fc6cc5f07e8bd2185f8fadd93e0 100644 (file)
--- a/gettime.c
+++ b/gettime.c
@@ -247,7 +247,8 @@ static void calibrate_cpu_clock(void)
        for (i = 0; i < NR_TIME_ITERS; i++)
                dprint(FD_TIME, "cycles[%d]=%lu\n", i, cycles[i] / 10);
 
        for (i = 0; i < NR_TIME_ITERS; i++)
                dprint(FD_TIME, "cycles[%d]=%lu\n", i, cycles[i] / 10);
 

-       avg /= (samples * 10);
+       avg /= samples;
+       avg = (avg + 9) / 10;

        dprint(FD_TIME, "avg: %lu\n", avg);
        dprint(FD_TIME, "mean=%f, S=%f\n", mean, S);
 
        dprint(FD_TIME, "avg: %lu\n", avg);
        dprint(FD_TIME, "mean=%f, S=%f\n", mean, S);