[dm-devel] [PATCH 1/1] block: Convert hd_struct in_flight from atomic to percpu
Brian King
brking at linux.vnet.ibm.com
Tue Jul 4 20:55:24 UTC 2017
On 07/01/2017 11:43 AM, Jens Axboe wrote:
> Now:
>
> http://git.kernel.dk/cgit/linux-block/commit/?h=mq-inflight&id=87f73ef2b9edb6834001df8f7cb48c7a116e8cd3
>
>> And updated the branch here:
>>
>> http://git.kernel.dk/cgit/linux-block/log/?h=mq-inflight
>>
>> to include that, and be based on top of for-4.13/block. If you prefer just
>> pulling a branch, pull:
>>
>> git://git.kernel.dk/linux-block mq-inflight
>
> I've tested it, and made a few adjustments and fixes. The branches are
> the same, just rebased. Works fine for me, even with partitions now.
>
> Let me know how it works for you.
This is looking very nice. This is what I'm seeing now:
1 null_blk device / 80 submit_queues / fio numjobs=80
9.4M IOPs
80 null_blk devices / 1 submit_queue per null_blk / fio numjobs=1 (1 per null_blk)
9.3M IOPs
1 null_blk device / 160 submit_queues / fio numjobs=160
9.8M IOPs
160 null_blk devices / 1 submit_queue per null_blk / fio numjobs=1 (1 per null_blk)
8.9M IOPs
What is queued in mq-inflight looks to resolve the issue I've been seeing.
Thanks!!!
Brian
--
Brian King
Power Linux I/O
IBM Linux Technology Center
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