From: Jens Axboe <jens.axboe@oracle.com>
Date: Thu, 15 Mar 2007 11:09:39 +0000 (+0100)
Subject: Improve rate accounting
X-Git-Tag: fio-1.15~88
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=a998c869545503e733f4ff0f2bf6fc1e2dceec6c;hp=4e991c23d2d06484f581eb5e2105bc102cb35941

Improve rate accounting

Don't assume usec_sleep() is extremely precise.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---

diff --git a/time.c b/time.c
index c5b67ff1..80f8ca49 100644
--- a/time.c
+++ b/time.c
@@ -130,9 +130,13 @@ void rate_throttle(struct thread_data *td, unsigned long time_spent,
 		unsigned long s = usec_cycle - time_spent;
 
 		td->rate_pending_usleep += s;
+
 		if (td->rate_pending_usleep >= 100000) {
+			struct timeval t;
+
+			fio_gettime(&t, NULL);
 			usec_sleep(td, td->rate_pending_usleep);
-			td->rate_pending_usleep = 0;
+			td->rate_pending_usleep -= utime_since_now(&t);
 		}
 	} else {
 		long overtime = time_spent - usec_cycle;