From: "Martin J. Bligh" <mbligh@aracnet.com>
To: William Lee Irwin III <wli@holomorphy.com>,
Andrew Morton <akpm@digeo.com>
Cc: bzzz@tmi.comex.ru, adilger@clusterfs.com,
linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net
Subject: Re: [PATCH] concurrent block allocation for ext2 against 2.5.64
Date: Fri, 14 Mar 2003 21:43:38 -0800 [thread overview]
Message-ID: <2650000.1047707016@[10.10.2.4]> (raw)
In-Reply-To: <20030315053053.GM20188@holomorphy.com>
>> On the quad Xeon (after increasing dirty_ratio and dirty_background_ratio so
>> I/O was negligible) I was able to measure a 1.5% improvement.
>> I worry about the hardware you're using there.
>
> Why? The adapter is "vaguely modern" (actually acquired as part of a
> hunt for an HBA w/a less buggy driver) but the box and disks and so on
> are still pretty ancient, so the absolute numbers aren't useful.
>
> To get a real comparison we'd have to compare spindles, HBA's, and
> cpus, and attempt to factor them out. The disks are actually only
> capable of doing 30MB/s or 40MB/s, the buses can only do 40MB/s, and
> the cpus are 700MHz P-III's. Where dbench gets its numbers faster than
> wirespeed I have no idea...
You'd also have to stop sending all your IO over a NUMA backplane ...
> This locking issue may just need more cpus to bring out.
More than 32 CPUs? Hmmmm.
M.
next prev parent reply other threads:[~2003-03-15 5:33 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-13 8:55 Alex Tomas
2003-03-13 9:58 ` Andrew Morton
2003-03-13 19:17 ` Alex Tomas
2003-03-13 22:25 ` Andrew Morton
2003-03-13 23:03 ` Andreas Dilger
2003-03-13 23:10 ` Andrew Morton
2003-03-13 23:03 ` Alex Tomas
2003-03-13 23:25 ` Andrew Morton
2003-03-13 23:56 ` Andreas Dilger
2003-03-14 7:20 ` Alex Tomas
2003-03-14 20:59 ` Andreas Dilger
2003-03-14 21:14 ` Alex Tomas
2003-03-15 4:37 ` William Lee Irwin III
2003-03-15 4:54 ` Andrew Morton
2003-03-15 5:30 ` William Lee Irwin III
2003-03-15 5:43 ` Martin J. Bligh [this message]
2003-03-15 5:50 ` William Lee Irwin III
2003-03-15 5:49 ` William Lee Irwin III
2003-03-15 6:20 ` William Lee Irwin III
2003-03-15 6:44 ` Andrew Morton
2003-03-15 7:05 ` William Lee Irwin III
2003-03-15 8:24 ` William Lee Irwin III
2003-03-15 9:47 ` William Lee Irwin III
2003-03-15 11:58 ` William Lee Irwin III
2003-03-15 12:08 ` Andrew Morton
2003-03-15 12:25 ` William Lee Irwin III
2003-03-15 8:16 ` [Ext2-devel] " Alex Tomas
2003-03-15 8:29 ` William Lee Irwin III
2003-03-15 8:32 ` Alex Tomas
2003-03-15 9:23 ` William Lee Irwin III
2003-03-14 18:25 ` Martin J. Bligh
2003-03-14 19:30 ` [Ext2-devel] " Daniel Phillips
2003-03-14 19:55 ` Andrew Morton
2003-03-13 17:39 ` [Ext2-devel] " Andreas Dilger
2003-03-13 18:43 ` Alex Tomas
2003-03-13 19:09 ` Matthew Wilcox
2003-03-13 19:39 ` Andrew Morton
2003-03-13 19:23 ` Theodore Ts'o
2003-03-13 19:44 ` Andreas Dilger
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