Re: call for more SD versus CFS comparisons (was: Re: [ck] Mainline plans)

From: Tobias Gerschner
Date: Tue Jun 12 2007 - 04:51:56 EST

2007/6/12, Ingo Molnar <mingo@xxxxxxx>:

* Tobias Gerschner <tobias.gerschner@xxxxxxxxx> wrote:

> I did run massive_intr.c for 60 secs with increasing nproc (
> 10,20,30,40,50,60) waiting for effects.
> Below a small table of the results
> nproc , usability result
> 10 , serious frame drops , Firefox hardly recognizes clicked links,
> but still usable
> 20 - 30, usability loss ( somehow under cfs firefox never finished
> user requests like displaying web pages or opening new pages , no
> feedback anymore, sudden changes on the desktop )

ouch! The expected load-testing result under CFS should be something
like this:

could you send me the output of /proc/sched_debug? (while say a
"massive_intr 20" is running?)

Roughly what hardware do you have? (could you send me your lspci -v
output and dmesg output?)



it's a peacock freeliner xp II. Close to 5 year old Laptop with an
Athlon XP 2600+ using 1 GB of RAM / no swap enabled.

The other information will be sent as soon as I am back at work .


Tobias Gerschner
Member of Board of Yoper Linux Ltd. NZ

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