From: lauraa@codeaurora.org (Laura Abbott)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC] change non-atomic bitops method
Date: Mon, 02 Feb 2015 10:53:16 -0800 [thread overview]
Message-ID: <54CFC79C.2040005@codeaurora.org> (raw)
In-Reply-To: <35FD53F367049845BC99AC72306C23D1044A02027E0A@CNBJMBX05.corpusers.net>
On 2/1/2015 7:55 PM, Wang, Yalin wrote:
> This patch change non-atomic bitops,
> add a if() condition to test it, before set/clear the bit.
> so that we don't need dirty the cache line, if this bit
> have been set or clear. On SMP system, dirty cache line will
> need invalidate other processors cache line, this will have
> some impact on SMP systems.
>
Any actual numbers to give an idea of the impact?
Thanks,
Laura
--
Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2015-02-02 18:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-02 3:55 [RFC] change non-atomic bitops method Wang, Yalin
2015-02-02 18:53 ` Laura Abbott [this message]
2015-02-02 19:31 ` Uwe Kleine-König
2015-02-02 23:29 ` Andrew Morton
2015-02-02 23:31 ` Russell King - ARM Linux
2015-02-03 1:17 ` Kirill A. Shutemov
2015-02-03 2:13 ` Wang, Yalin
2015-02-03 5:42 ` Wang, Yalin
2015-02-03 6:38 ` Andrew Morton
2015-02-03 7:03 ` Wang, Yalin
2015-02-03 8:42 ` Wang, Yalin
2015-02-03 10:59 ` Andrew Morton
2015-02-09 8:18 ` Wang, Yalin
2015-02-09 20:34 ` Andrew Morton
2015-02-10 7:05 ` Wang, Yalin
2015-02-09 21:42 ` Rasmus Villemoes
2015-02-03 8:40 ` David Miller
2015-02-03 8:48 ` Andrew Morton
2015-02-03 9:34 ` Rasmus Villemoes
2015-02-03 9:41 ` Wang, Yalin
2015-02-03 10:39 ` Kirill A. Shutemov
2015-02-03 15:14 ` David Howells
2015-02-03 19:10 ` Uwe Kleine-König
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