Re: Random file I/O regressions in 2.6

[Alexey Kopytov <alexeyk@mysql.com>]

Andrew Morton wrote:
>Alexey Kopytov <alexeyk@mysql.com> wrote:
>> With the patch:
>> ---------------
>> Time spent for test:  86.5459s
>>
>> no of times window reset because of hits: 0
>> no of times window reset because of misses: 0
>> no of times window was shrunk because of hits: 1066
>> no of times the page request was non-contiguous: 5860
>> no of times the page request was contiguous : 18099
>
>The patch brought my test box to the same speed as 2.4.  With the deadline
>scheduler it was a bit faster than 2.4.  I didn't do a lot of testing
>though.  I was using ext2.  Please try deadline.
>

Results with the deadline scheduler on my hardware:

Time spent for test:  92.8340s

no of times window reset because of hits: 0
no of times window reset because of misses: 0
no of times window was shrunk because of hits: 1108
no of times the page request was non-contiguous: 5860
no of times the page request was contiguous : 18091

I have updated the results on the SysBench home page with 2.6.6-rc3 with the 
patch applied.

-- 
Alexey Kopytov, Software Developer
MySQL AB, www.mysql.com

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