From: Jens Axboe <jens.axboe@oracle.com>
To: Al Boldi <a1426z@gawab.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrew Morton <akpm@linux-foundation.org>,
Richard Kennedy <richard@rsk.demon.co.uk>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH] mm: stop balance_dirty_pages doing too much work
Date: Fri, 26 Jun 2009 07:02:45 +0200 [thread overview]
Message-ID: <20090626050245.GL31415@kernel.dk> (raw)
In-Reply-To: <200906252010.33535.a1426z@gawab.com>
On Thu, Jun 25 2009, Al Boldi wrote:
> Jens Axboe wrote:
> > The test case is random mmap writes to files that have been laid out
> > sequentially. So it's all seeks. The target drive is an SSD disk though,
> > so it doesn't matter a whole lot (it's a good SSD).
>
> Oh, SSD. What numbers do you get for normal disks?
I haven't run this particular test on rotating storage. The type of
drive should not matter a lot, I'm mostly interested in comparing
vanilla and the writeback patches on identical workloads and storage.
--
Jens Axboe
WARNING: multiple messages have this Message-ID (diff)
From: Jens Axboe <jens.axboe@oracle.com>
To: Al Boldi <a1426z@gawab.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrew Morton <akpm@linux-foundation.org>,
Richard Kennedy <richard@rsk.demon.co.uk>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH] mm: stop balance_dirty_pages doing too much work
Date: Fri, 26 Jun 2009 07:02:45 +0200 [thread overview]
Message-ID: <20090626050245.GL31415@kernel.dk> (raw)
In-Reply-To: <200906252010.33535.a1426z@gawab.com>
On Thu, Jun 25 2009, Al Boldi wrote:
> Jens Axboe wrote:
> > The test case is random mmap writes to files that have been laid out
> > sequentially. So it's all seeks. The target drive is an SSD disk though,
> > so it doesn't matter a whole lot (it's a good SSD).
>
> Oh, SSD. What numbers do you get for normal disks?
I haven't run this particular test on rotating storage. The type of
drive should not matter a lot, I'm mostly interested in comparing
vanilla and the writeback patches on identical workloads and storage.
--
Jens Axboe
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next prev parent reply other threads:[~2009-06-26 5:02 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-24 10:38 [RFC][PATCH] mm: stop balance_dirty_pages doing too much work Richard Kennedy
2009-06-24 22:27 ` Andrew Morton
2009-06-24 22:27 ` Andrew Morton
2009-06-25 5:13 ` Jens Axboe
2009-06-25 5:13 ` Jens Axboe
2009-06-25 8:00 ` Peter Zijlstra
2009-06-25 8:00 ` Peter Zijlstra
2009-06-25 9:10 ` Jens Axboe
2009-06-25 9:10 ` Jens Axboe
2009-06-25 9:26 ` Jens Axboe
2009-06-25 9:26 ` Jens Axboe
2009-06-25 12:33 ` Al Boldi
2009-06-25 12:33 ` Al Boldi
2009-06-25 12:43 ` Jens Axboe
2009-06-25 12:43 ` Jens Axboe
2009-06-25 13:46 ` Al Boldi
2009-06-25 13:46 ` Al Boldi
2009-06-25 14:44 ` Jens Axboe
2009-06-25 14:44 ` Jens Axboe
2009-06-25 17:10 ` Al Boldi
2009-06-25 17:10 ` Al Boldi
2009-06-26 5:02 ` Jens Axboe [this message]
2009-06-26 5:02 ` Jens Axboe
2009-06-26 11:37 ` Al Boldi
2009-06-26 11:37 ` Al Boldi
2009-06-26 12:35 ` Jens Axboe
2009-06-26 12:35 ` Jens Axboe
2009-06-26 9:15 ` Richard Kennedy
2009-06-26 9:15 ` Richard Kennedy
2009-06-26 9:20 ` Jens Axboe
2009-06-26 9:20 ` Jens Axboe
2009-08-07 12:20 ` Peter Zijlstra
2009-08-07 12:20 ` Peter Zijlstra
2009-08-07 14:36 ` Richard Kennedy
2009-08-07 14:36 ` Richard Kennedy
2009-08-07 14:38 ` Peter Zijlstra
2009-08-07 14:38 ` Peter Zijlstra
2009-08-07 15:22 ` Chris Mason
2009-08-07 15:22 ` Chris Mason
2009-08-07 16:09 ` Richard Kennedy
2009-08-07 16:09 ` Richard Kennedy
2009-08-07 21:02 ` Chris Mason
2009-08-07 21:02 ` Chris Mason
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