From: Suparna Bhattacharya <suparna@in.ibm.com>
To: linux-aio@kvack.org, linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: aio-stress throughput regressions from 2.6.11 to 2.6.12
Date: Fri, 1 Jul 2005 13:26:00 +0530 [thread overview]
Message-ID: <20050701075600.GC4625@in.ibm.com> (raw)
Has anyone else noticed major throughput regressions for random
reads/writes with aio-stress in 2.6.12 ?
Or have there been any other FS/IO regressions lately ?
On one test system I see a degradation from around 17+ MB/s to 11MB/s
for random O_DIRECT AIO (aio-stress -o3 testext3/rwfile5) from 2.6.11
to 2.6.12. It doesn't seem filesystem specific. Not good :(
BTW, Chris/Ben, it doesn't look like the changes to aio.c have had an impact
(I copied those back to my 2.6.11 tree and tried the runs with no effect)
So it is something else ...
Ideas/thoughts/observations ?
Regards
Suparna
--
Suparna Bhattacharya (suparna@in.ibm.com)
Linux Technology Center
IBM Software Lab, India
WARNING: multiple messages have this Message-ID (diff)
From: Suparna Bhattacharya <suparna@in.ibm.com>
To: linux-aio@kvack.org, linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: aio-stress throughput regressions from 2.6.11 to 2.6.12
Date: Fri, 1 Jul 2005 13:26:00 +0530 [thread overview]
Message-ID: <20050701075600.GC4625@in.ibm.com> (raw)
Has anyone else noticed major throughput regressions for random
reads/writes with aio-stress in 2.6.12 ?
Or have there been any other FS/IO regressions lately ?
On one test system I see a degradation from around 17+ MB/s to 11MB/s
for random O_DIRECT AIO (aio-stress -o3 testext3/rwfile5) from 2.6.11
to 2.6.12. It doesn't seem filesystem specific. Not good :(
BTW, Chris/Ben, it doesn't look like the changes to aio.c have had an impact
(I copied those back to my 2.6.11 tree and tried the runs with no effect)
So it is something else ...
Ideas/thoughts/observations ?
Regards
Suparna
--
Suparna Bhattacharya (suparna@in.ibm.com)
Linux Technology Center
IBM Software Lab, India
--
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next reply other threads:[~2005-07-01 7:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-01 7:56 Suparna Bhattacharya [this message]
2005-07-01 7:56 ` aio-stress throughput regressions from 2.6.11 to 2.6.12 Suparna Bhattacharya
2005-07-01 14:25 ` Benjamin LaHaise
2005-07-06 4:30 ` Suparna Bhattacharya
2005-07-08 17:58 ` Benjamin LaHaise
2005-07-08 17:58 ` Benjamin LaHaise
2005-07-05 14:00 ` Chris Mason
2005-07-05 14:00 ` Chris Mason
2005-07-05 16:12 ` Benjamin LaHaise
2005-07-05 16:12 ` Benjamin LaHaise
2005-07-06 10:37 ` Suparna Bhattacharya
2005-07-06 10:37 ` Suparna Bhattacharya
2005-07-06 12:10 ` aio-stress regressions in 2.6.12 narrowed down to AIC7xxx Suparna Bhattacharya
2005-07-11 7:43 ` aio-stress throughput regressions from 2.6.11 to 2.6.12 Sébastien Dugué
2005-07-11 7:43 ` Sébastien Dugué
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