From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 10 Dec 2012 09:15:59 +0000 (+0100)
Subject: cpu clock: round up when dividing by samples
X-Git-Tag: fio-2.0.12~14
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=d7abad3d0a2aab71707264ae088ecc19c88585dc;hp=89db727d5baaf32bc665c2addd844da5541249bb

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 df42c29c..1ba18e99 100644
--- 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);
 
-	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);