From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailsrv.s3group.com ([193.120.90.35]:46903 "EHLO mailsrv.s3group.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754902AbaHNMjv (ORCPT ); Thu, 14 Aug 2014 08:39:51 -0400 Received: from avsrvd.s3group.com (avsrvd.s3group.com [193.120.90.37]) by mailsrv.s3group.com with ESMTP id s7ECPTRJ030039 for ; Thu, 14 Aug 2014 13:25:29 +0100 Received: from avsrvd.s3group.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1825215005D for ; Thu, 14 Aug 2014 13:25:29 +0100 (IST) Received: from excork2.dublin.ad.s3group.com (unknown [193.120.91.10]) by avsrvd.s3group.com (Postfix) with ESMTP id 06756150052 for ; Thu, 14 Aug 2014 13:25:29 +0100 (IST) Message-ID: <53ECAAB8.7040205@s3group.com> Date: Thu, 14 Aug 2014 13:25:28 +0100 From: John OCallaghan MIME-Version: 1.0 Subject: runtime and status-interval Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: fio@vger.kernel.org Hi I am running the fio2.1.11 and am seeing something odd with the "runt" value on jobs. If I run a test with "--status-interval=5" and let it run for over 20 seconds I see the runt go from sensible values to nonsensical values once it reaches the 20 second boundary. Below is a snip from a log that I took. Notice that at the 19 second boundary the runt is OK (19925msec). But at the next status interval the runt has grown from 19 seconds to 21009 seconds! This throws out the bw calcs (1505KB/s down to 1900B/s). Here is my fio config file [global] time_based=1 runtime=180 directory=. size=64m [job1-HD-ReadWrite] rw=readwrite blocksize=1500k filename=HDRW.STR rate=1500k,1500k And I run as follows: ./fio --status-interval=5 test.fio Hope thats useful to someone! John ---------------------- job1-HD-ReadWrite: (groupid=0, jobs=1): err= 0: pid=25640: Thu Aug 14 13:13:20 2014 Description : [HD Seq read/write] read : io=30000KB, bw=1505.7KB/s, iops=1, runt= 19925msec clat (msec): min=4, max=9, avg= 7.80, stdev= 1.24 lat (msec): min=4, max=9, avg= 7.80, stdev= 1.24 bw (KB /s): min= 1495, max= 2991, per=100.00%, avg=1871.37, stdev=664.94 write: io=30000KB, bw=1505.7KB/s, iops=1, runt= 19925msec clat (usec): min=553, max=2030, avg=1498.71, stdev=449.27 lat (usec): min=658, max=2161, avg=1617.00, stdev=464.46 clat percentiles (usec): bw (KB /s): min= 1488, max= 3024, per=100.00%, avg=1857.12, stdev=665.91 lat (usec) : 750=4.88%, 1000=4.88% lat (msec) : 2=34.15%, 4=7.32%, 10=48.78% job1-HD-ReadWrite: (groupid=0, jobs=1): err= 0: pid=25640: Thu Aug 14 13:13:25 2014 Description : [HD Seq read/write] read : io=39000KB, bw=1900B/s, iops=0, runt=21009984msec clat (msec): min=4, max=78, avg=10.49, stdev=13.99 lat (msec): min=4, max=78, avg=10.49, stdev=13.99 bw (KB /s): min= 1495, max= 2991, per=100.00%, avg=1853.76, stdev=649.04 write: io=37500KB, bw=1827B/s, iops=0, runt=21009984msec clat (usec): min=553, max=2030, avg=1405.73, stdev=462.04 lat (usec): min=610, max=2161, avg=1519.96, stdev=480.39 bw (KB /s): min= 1488, max= 3024, per=100.00%, avg=1860.43, stdev=662.42 lat (usec) : 750=5.77%, 1000=5.77% lat (msec) : 2=32.69%, 4=5.77%, 10=48.08%, 100=1.92% cpu : usr=0.02%, sys=0.34%, ctx=172, majf=0, minf=32 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued : total=r=26/w=26/d=0, short=r=0/w=0/d=0 latency : target=0, window=0, percentile=100.00%, depth=1 Run status group 0 (all jobs): READ: io=39000KB, aggrb=1KB/s, minb=1KB/s, maxb=1KB/s, mint=21009984msec, maxt=21009984msec WRITE: io=37500KB, aggrb=1KB/s, minb=1KB/s, maxb=1KB/s, mint=21009984msec, maxt=21009984msec ----- The information contained in this e-mail and in any attachments is confidential and is designated solely for the attention of the intended recipient(s). If you are not an intended recipient, you must not use, disclose, copy, distribute or retain this e-mail or any part thereof. If you have received this e-mail in error, please notify the sender by return e-mail and delete all copies of this e-mail from your computer system(s). Please direct any additional queries to: communications@s3group.com. Thank You. Silicon and Software Systems Limited (S3 Group). Registered in Ireland no. 378073. Registered Office: South County Business Park, Leopardstown, Dublin 18.