linux-kernel - Re: [PATCH RFC] x86:Improve memset with general 64bit instruction

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Message-ID: <CAOGi=dOoCkU5Ni8r7pyejMuSdkMt2jOPs2J2OEQ9YxABxNYibw@mail.gmail.com>
Date:	Mon, 14 Apr 2014 21:31:16 +0800
From:	Ling Ma <ling.ma.program@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	mingo@...hat.com, tglx@...utronix.de, hpa@...or.com,
	neleai@...nam.cz, linux-kernel@...r.kernel.org,
	Ling Ma <ling.ml@...baba-inc.com>
Subject: Re: [PATCH RFC] x86:Improve memset with general 64bit instruction

The kernel version 3.14 shows memcpy, memset occur 19622 and  14189
times respectively.
so memset is still important for us, correct?

Thanks
Ling

2014-04-14 6:03 GMT+08:00, Andi Kleen <andi@...stfloor.org>:
> On Sun, Apr 13, 2014 at 11:11:59PM +0800, Ling Ma wrote:
>> Any further comments  ?
>
> It would be good to test on some more machines that you don't cause
> regressions.
>
> But I'm not aware of any workload that is doing a lot of memset (not
> counting clear_page).  Copies likely matter much more.
>
> -Andi
>
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