Hi Mark,
Could you do a fio test in your env with the busy_poll=1 ?
I am very interested in the busy_poll result. Thanks!
2014-10-30 15:44 GMT+08:00 Mark Kirkwood <mark.kirkwood@xxxxxxxxxxxxxxx>:
> On 30/10/14 03:31, Jens Axboe wrote:
>>
>> On 2014-10-29 01:15, Ketor D wrote:
>>>
>>> Hi, Jens,
>>>
>>> There is cmdline parse bug in the fio rbd test.
>>>
>>> I have fixed this and create a pull request on the github.
>>>
>>> Please review.
>>>
>>> After fix the bugs, the fio test can run.
>>
>>
>> I merged your two pull requests (thanks!) and committed a polished
>> variant of the sort patch. Ketor and Mark, would you mind both running a
>> quick benchmark on the current -git head?
>>
>
> Better late than never (sorry), comparing with the 'original' fio code
> containing the usleep(100):
>
> blocksize k | head iops | orig iops
> ------------+---------------+--------------
> 4 | 11114 | 11516
> 128 | 4551 | 6550
> 1024 | 1195 | 1248
>
> So we do pretty much the same except in the middle blocksize range (I
> checked again with the old binary just to rule out any other changes on the
> ceph end...).
>
> Regards
>
> Mark
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