linux-kernel - Re: [RFC PATCH 1/1] prefetch result in 64 bit atomic ops

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Message-ID: <1397550831.16090.15.camel@joe-AO722>
Date:	Tue, 15 Apr 2014 01:33:51 -0700
From:	Joe Perches <joe@...ches.com>
To:	Will Deacon <will.deacon@....com>
Cc:	Pranith Kumar <bobby.prani@...il.com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 1/1] prefetch result in 64 bit atomic ops

On Tue, 2014-04-15 at 08:52 +0100, Will Deacon wrote:
> Did you write this patch as a basic port of the arch/arm/ patches I wrote,
> or was it based on performance figures from real hardware?

>From an earlier thread: https://lkml.org/lkml/2014/4/14/547

On Mon, 2014-04-14 at 14:11 -0400, Pranith Kumar wrote:
> On Mon, Apr 14, 2014 at 2:04 PM, Joe Perches <joe@...ches.com> wrote:
> > Are there some benchmark comparison results
> > you neglected to attach?
> 
> I was trying to get these ops to be similar to the 32 bit atomic ops which
> all have prefetch. I did not see any reason why we shouldn't do the same
> here. But no, no hard numbers yet.  Send me a dev board please :)


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