From: "Brian F. G. Bidulock" <bidulock@openss7.org>
To: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>,
adilger@clusterfs.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] use unlikely() for current_kernel_time() loop
Date: Thu, 8 Jun 2006 02:59:30 -0600 [thread overview]
Message-ID: <20060608025930.A15559@openss7.org> (raw)
In-Reply-To: <200606080907.26350.ak@suse.de>; from ak@suse.de on Thu, Jun 08, 2006 at 09:07:26AM +0200
Andi,
On Thu, 08 Jun 2006, Andi Kleen wrote:
>
> > > Originally because it made assembly too unreadable. Later it was discovered
> > > it produces smaller code too.
> > >
Another quick check on Intel 630. w/o -fno-reorder-blocks: code increased 2% in
size; performance increased 2% per hyperthread; code still as readable with
objdump -S -d. Rather marginal one way or the other.
next prev parent reply other threads:[~2006-06-08 8:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-07 17:36 [PATCH] use unlikely() for current_kernel_time() loop Andreas Dilger
2006-06-08 2:28 ` Andi Kleen
2006-06-08 5:01 ` Andrew Morton
2006-06-08 5:39 ` Andi Kleen
2006-06-08 6:41 ` Brian F. G. Bidulock
2006-06-08 6:51 ` Andi Kleen
2006-06-08 7:00 ` Brian F. G. Bidulock
2006-06-08 7:07 ` Andi Kleen
2006-06-08 7:43 ` Brian F. G. Bidulock
2006-06-08 8:59 ` Brian F. G. Bidulock [this message]
2006-06-08 9:14 ` Andi Kleen
2006-06-08 9:36 ` Brian F. G. Bidulock
2006-06-08 10:20 ` Andi Kleen
2006-06-08 10:50 ` Brian F. G. Bidulock
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