Re: Time sliced CFQ io scheduler

Prakash K. Cheemplavam
2004-12-03T09:13:51Z

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Jens Axboe schrieb:
> On Thu, Dec 02 2004, Prakash K. Cheemplavam wrote:
>

>> 0 3 3080 2208 1156 817712 0 0 3592 75624 1326 2289 1 36 0
>> 63
>> 0 3 3080 2664 1156 818240 0 0 5124 15692 1302 992 1 18 0
>> 81
>> 0 3 3080 2580 1160 815832 0 0 4356 155792 1375 1064 1 39
>> 0 60
>> 0 3 3080 2472 1160 817124 0 0 3076 100852 1345 1138 1 23
>> 0 76
>> 2 4 3080 2836 1148 816228 0 0 3336 100412 1352 1379 1 47
>> 0 52
>> 0 4 3080 2708 1144 815964 0 0 3844 48908 1343 871 1 25 0
>> 74
>> 0 3 3080 2748 1152 815984 0 0 3332 71996 1338 843 1 27 0
>> 72
>
>
> Can you try with the patch that is in the parent of this thread? The
> above doesn't look that bad, although read performance could be better
> of course. But try with the patch please, I'm sure it should help you
> quite a lot.
>

It actually got worse: Though the read rate seems accepteble, it is not, as
interactivity is dead while writing. I cannot start porgrammes, other programmes
which want to do i/o pretty much hang. This is only while writing. While reading
there is no such problem.

Prakash

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procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
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