From: Jeff Moyer <jmoyer@redhat.com>
To: zach.brown@oracle.com
Cc: linux-aio <linux-aio@kvack.org>,
Linux Kernel Mailing <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [patch v4 0/3] aio: implement request batching [more performance numbers]
Date: Tue, 06 Oct 2009 13:45:03 -0400 [thread overview]
Message-ID: <x49eipga02o.fsf@segfault.boston.devel.redhat.com> (raw)
In-Reply-To: <x49zl8976g3.fsf@segfault.boston.devel.redhat.com> (Jeff Moyer's message of "Fri, 02 Oct 2009 18:54:20 -0400")
Here's a mail I got from Nathan Roberts.
Cheers,
Jeff
---
Similar test as before. I had to re-upload the files so comparing
against last time isn't really apples-apples.
Disk is a cciss logical drive consisting of 12 SATA drives in a RAID6
configuration with 128K stripes.
Test case 1 is to read 1 million random 40K files (no file is read
more than once), 16 4K iocbs at a time, 100 threads.
Test case 2 is the same except 100,000 128K files are read.
Unit of measure is "files read per second".
40K
-------------------------------------------------
Kernel NOOP
------ ----
2.6.30.5 682
2.6.30.5 (w/o drop_caches) 718
2.6.30.5+patch_v4 900
2.6.30.5+patch_v4 (w/o drop caches) 965
128K
-------------------------------------------------
Kernel NOOP
------ ----
2.6.30.5 242
2.6.30.5 (w/o drop_caches) 350
2.6.30.5+patch_v4 292
2.6.30.5+patch_v4 (w/o drop caches) 420
Hope it helps.
Nathan
next prev parent reply other threads:[~2009-10-06 17:45 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-02 22:54 [patch v4 0/3] aio: implement request batching Jeff Moyer
2009-10-02 22:56 ` [patch v4 1/2] block: get rid of the WRITE_ODIRECT flag Jeff Moyer
2009-10-02 22:57 ` [patch v4 2/2] aio: implement request batching Jeff Moyer
2009-10-02 22:58 ` [patch v4 0/3] " Jeff Moyer
2009-10-06 17:45 ` Jeff Moyer [this message]
2009-10-06 18:06 ` [patch v4 0/3] aio: implement request batching [more performance numbers] Jens Axboe
2009-10-06 18:18 ` Jeff Moyer
2009-10-07 10:52 ` Jens Axboe
2009-10-07 12:09 ` Jeff Moyer
2009-10-27 16:16 ` Jeff Moyer
2009-10-28 8:28 ` Jens Axboe
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