linux-kernel - Re: [PATCH RFC 0/2] percpu_ida: Take into account CPU topology when stealing tags

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Message-ID: <CACVXFVN-roORYH8b-qZ10e2_wrL1W5-xO2P=A_ARPFL2GqDn2Q@mail.gmail.com>
Date:	Fri, 25 Apr 2014 17:10:32 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kent Overstreet <kmo@...erainc.com>,
	Shaohua Li <shli@...nel.org>,
	Nicholas Bellinger <nab@...ux-iscsi.org>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH RFC 0/2] percpu_ida: Take into account CPU topology when
 stealing tags

Hi Jens,

On Wed, Apr 23, 2014 at 9:25 AM, Jens Axboe <axboe@...nel.dk> wrote:
> On 2014-04-22 18:53, Ming Lei wrote:
>
>
>> In my null_blk test on a quad core SMP VM:
>>
>>       - 4 hw queue
>>       - timer mode
>>
>> With the above approach, tag allocation from local CPU can be
>> improved from:
>>
>>          5%   -> 50% for boot CPU
>>          30% -> 90% for non-boot CPU.
>>
>> If no one objects the idea, I'd like to post a patch for review.
>
>
> Sent it out, that can't hurt. I'll take a look at it, and give it a test
> spin as well.

I have sent out the patch in below link, and appreciate much
you will take a look at it.

      marc.info/?l=linux-kernel&m=139826944613225&w=2

Thanks,
-- 
Ming Lei
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