From: Richard Henderson <rth@twiddle.net>
To: Matt Turner <mattst88@gmail.com>
Cc: linux-alpha@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Subject: Re: [PATCH] alpha: simplify and optimize sched_find_first_bit
Date: Wed, 28 Apr 2010 20:56:21 -0700 [thread overview]
Message-ID: <4BD90365.3030404@twiddle.net> (raw)
In-Reply-To: <1272512276-25975-1-git-send-email-mattst88@gmail.com>
On 04/28/2010 08:37 PM, Matt Turner wrote:
> Search only the first 100 bits instead of 140, saving a couple
> instructions. The resulting code is about 1/3 faster (40K ticks/1000
> iterations down to 30K ticks/1000 iterations).
>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Richard Henderson <rth@twiddle.net>
> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
> Cc: linux-alpha@vger.kernel.org
> Signed-off-by: Matt Turner <mattst88@gmail.com>
Acked-by: Richard Henderson <rth@twiddle.net>
r~
next prev parent reply other threads:[~2010-04-29 3:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-29 3:37 [PATCH] alpha: simplify and optimize sched_find_first_bit Matt Turner
2010-04-29 3:56 ` Richard Henderson [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-04-08 18:34 mattst88
2010-04-08 18:52 ` Richard Henderson
[not found] ` <4BBE2B5C.6020802@twiddle.net>
2010-04-29 2:08 ` Matt Turner
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