From: Dave Hansen <haveblue@us.ibm.com>
To: "Martin J. Bligh" <mbligh@aracnet.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
lse-tech <lse-tech@lists.sourceforge.net>,
Andrew Morton <akpm@digeo.com>
Subject: Re: Performance of ext3 on large systems
Date: Sun, 16 Feb 2003 17:18:41 -0800 [thread overview]
Message-ID: <3E503871.8040107@us.ibm.com> (raw)
In-Reply-To: <66390000.1045442686@[10.10.2.4]>
Martin J. Bligh wrote:
> OK, so I guess we all know that ext3 doesn't scale well. But by
> accident, I have some numbers on exactly how bad it really is:
>
> Kernbench-2: (make -j N vmlinux, where N = 2 x num_cpus)
> Elapsed User System CPU
> 2.5.61-mjb0.1-ext3 48.47 564.13 143.16 1458.67
> 2.5.61-mjb0.1-ext2 46.06 563.04 115.36 1472.33
>
> (look at system time ... eeek!)
>
> diffprofile (+ is worse with ext3, - better)
>
> 12702 .text.lock.inode
# grep -c lock_kernel fs/ext3/inode.c
35
--
Dave Hansen
haveblue@us.ibm.com
next prev parent reply other threads:[~2003-02-17 1:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-17 0:44 Martin J. Bligh
2003-02-17 1:18 ` Dave Hansen [this message]
2003-02-17 1:29 ` Andrew Morton
2003-02-17 15:20 ` Sean Neakums
2003-02-17 15:29 ` John Bradford
2003-02-17 15:56 ` Robert Love
2003-02-17 16:06 ` Sean Neakums
2003-02-17 16:22 ` John Bradford
2003-02-17 16:47 ` Matti Aarnio
2003-02-17 17:05 ` John Bradford
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