Re: Memory management in 2.6

[Nick Piggin <piggin@xxxxxxxxxxxxxxx>]

Michael Frank wrote:

>I had already sent a version (ti-tests) dedicated to stress testing to LKML in October.
>
>Just in case I enclose those again. README inside.
>
>I ran 2.6 again for the first time since -test9 yesterday to test
>swsusp and immeadiatly went to elevator=deadline as aio is unusable
>at high io loads which I need to break swsusp in.
>
>If you do on a 2GHz+ machine: 
>
>$ti stat ub17 ddw 4 5000
>
>This gives a load avg of ~40 on a 2.4G P4 with 533MHz FSB
>
>2.4.23 behaves "proportionate" to load - at these loads mouse is jerky but has best throughput.
>
>2.6 with deadline is similar but a bit slower and the mouse is very smooth.
>
>2.6 with aio the mouse is smooth but no io throughput and io is highly intermittent. AFAICS similar to -test9.
>
>It must be recognized that these tests act in a non-anticipatory manner - this is what they are designed for ;)
>

Hmm... thats a bit alarming. I'll have to take a look at why that is so, 
thanks.
(2.6 -bk and -mm kernels have some as-iosched changes by the way)

I'll also see if they might be useful as an mm regression test.


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