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

From: Ming Lei
Date: Fri Apr 25 2014 - 05:11:18 EST


Hi Jens,

On Wed, Apr 23, 2014 at 9:25 AM, Jens Axboe <axboe@xxxxxxxxx> 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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