From: Pavel Machek <pavel@suse.cz>
To: Jens Axboe <axboe@suse.de>
Cc: Hua Zhong <hzhong@gmail.com>,
linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: Re: [PATCH] likely cleanup: revert unlikely in ll_back_merge_fn
Date: Sun, 30 Apr 2006 19:25:03 +0000 [thread overview]
Message-ID: <20060430192503.GE4452@ucw.cz> (raw)
In-Reply-To: <20060425183026.GR4102@suse.de>
On Tue 25-04-06 20:30:26, Jens Axboe wrote:
> On Tue, Apr 25 2006, Hua Zhong wrote:
> > With likely/unlikely profiling (see the recent patch dwalker@mvista.com
> > sent), on my not-so-busy-typical-development system it shows more than
> > 80K misses and no hits. So I guess it makes sense to revert.
> >
> > I don't know BIO code very well, but I hope this data is useful for the
> > experts.
>
> Well you'd want to optimize for the busy case, right, no point in
> optimizing for a more idle system.
Careful here... for battery-powered systems you may want to optimize
for idle system...
Pavel
--
Thanks, Sharp!
prev parent reply other threads:[~2006-05-01 20:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-25 18:18 [PATCH] likely cleanup: revert unlikely in ll_back_merge_fn Hua Zhong
2006-04-25 18:30 ` Jens Axboe
2006-04-25 21:38 ` Hua Zhong
2006-04-26 5:20 ` Jens Axboe
2006-04-26 13:50 ` James Bottomley
2006-04-26 13:55 ` Jens Axboe
2006-04-26 14:24 ` James Bottomley
2006-04-27 14:39 ` Jens Axboe
2006-04-26 17:06 ` Hua Zhong
2006-04-30 19:25 ` Pavel Machek [this message]
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