From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Andrew Morton <akpm@digeo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Strange performance change 59 -> 61/62
Date: Fri, 21 Feb 2003 09:27:29 -0800 [thread overview]
Message-ID: <11870000.1045848448@[10.10.2.4]> (raw)
In-Reply-To: <20030220234522.185f3f6c.akpm@digeo.com>
>> Some more stats ... which look rather suspicious. 600% increase for
>> dentry_open and __mark_inode_dirty? Hmmmmm.
>
> __mark_inode_dirty() just got itself an smp_mb(). Would be instructive to
> disable that.
>
> dentry_open(): don't know - fs/open.c hasn't changed at all. Perhaps
> dcache_rcu has caused additional pingpong?
2.5.59-mjb6 84 __mark_inode_dirty
2.5.61-mjb1 594 __mark_inode_dirty
2.5.61-mjb1-no_mb 74 __mark_inode_dirty
Yup, that fixed that one ... but presumably it was put there for a reason,
so I can't just rip it out ;-) Thanks, I'll go take a closer look at the
others.
M
next prev parent reply other threads:[~2003-02-21 17:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-19 16:23 Martin J. Bligh
2003-02-19 18:19 ` Andrew Morton
2003-02-21 7:19 ` Martin J. Bligh
2003-02-21 7:28 ` Martin J. Bligh
2003-02-21 7:45 ` Andrew Morton
2003-02-21 17:27 ` Martin J. Bligh [this message]
2003-02-21 20:20 ` Andrew Morton
2003-02-22 7:46 ` Martin J. Bligh
2003-02-22 8:04 ` Andrew Morton
2003-02-22 8:10 ` Martin J. Bligh
2003-02-19 17:19 Martin J. Bligh
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