Re: 2.6 vs 2.4 regression when running gnomemeeting

[Christian Meder <chris@onestepahead.de>]

[-- Attachment #1: Type: text/plain, Size: 2028 bytes --]

On Fri, 2003-12-19 at 21:32, William Lee Irwin III wrote:
> On Fri, Dec 19, 2003 at 09:11:50PM +0100, Christian Meder wrote:
> > I've got a longstanding regression in gnomemeeting usage when switching
> > between 2.4 and 2.6 kernels.
> > Phenomenon: 
> > Without load gnomemeeting VOIP connections are fine. As soon as some
> > load like a kernel compile is put on the laptop the gnomemeeting audio
> > stream is cut to pieces and gets unintelligible . On 2.4.2x I don't get
> > even the slightest distortion in the audio stream under load. I played
> > around with different nice levels with no success. The problem persisted
> > during the whole 2.6.0-test series no matter whether I used -mm kernels
> > or pristine Linus kernels. Even when nicing the kernel compile to +19
> > the distortions start right away. I tried Nick Piggin's scheduler which
> > fared slightly better after changing the nice level of gnomemeeting to
> > -10 but it's still a far cry from the 2.4.2x feeling without any
> > fiddling with nice values.
> > Any hints where to start looking are greatly appreciated.
> 
> Please instrument your workload with the following, and send logs of the
> output (preferably compressed) to me and possibly others:
> 
> top b d 5
> vmstat 5
> while true; do cat /proc/vmstat; sleep 5; done
> while true; do cat /proc/meminfo; sleep 5; done
> 
> A good way to log commands like this is:
> 
> (command) > /home/foo.log.1 2>&1 &
> 
> where parentheses surround the command in the actual shell input.

Hi,

I've attached the tarred output of a gnomemeeting run without load and
without distortions and another tarred output of a gnomemeeting run
while compiling a kernel with severe distortions in the audio stream.


			Christian Meder 
-- 
Christian Meder, email: chris@onestepahead.de
 
What's the railroad to me ?
I never go to see
Where it ends.
It fills a few hollows,
And makes banks for the swallows, 
It sets the sand a-blowing,
And the blackberries a-growing.
                      (Henry David Thoreau)
 




[-- Attachment #2: noload.tar.bz2 --]
[-- Type: application/x-bzip, Size: 8350 bytes --]

[-- Attachment #3: load.tar.bz2 --]
[-- Type: application/x-bzip, Size: 9520 bytes --]