Re: [PATCH 01 of 16] remove nr_scan_inactive/active

Rik van Riel
2007-06-26T19:02:37Z

Andrew Morton wrote:
> On Tue, 26 Jun 2007 13:08:57 -0400 Rik van Riel <riel@redhat.com> wrote:
>
>>> If all tasks spend 10 minutes in shrink_active_list before the first
>>> call to shrink_inactive_list that could mean you hit the race that I'm
>>> just trying to fix with this very patch.
>> I got around to testing it now. I am using AIM7 since it is
>> a very anonymous memory heavy workload.
>>
>> Unfortunately your patch does not fix the problem, but behaves
>> as I had feared :(
>>
>> Both the normal kernel and your kernel fall over once memory
>> pressure gets big enough, but they explode differently and
>> at different points.
>>
>> I am running the test on a quad core x86-64 system with 2GB
>> memory. I am "zooming in" on the 4000 user range, because
>> that is where they start to diverge. I am running aim7 to
>> cross-over, which is the point at which fewer than 1 jobs/min/user
>> are being completed.
>
> with what command line and config scripts does one run aim7 to
> reproduce this?

reaim -x -i 100 -s 5000

Using the default reaim.config and workfile.shared

> Where's the system time being spent?

I will run the tests again with profiling enabled.

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