Lowlatency kernel testing (Re: A feature for -lowlatency kernel?)

David Henningsson david.henningsson at canonical.com
Tue Apr 5 19:13:45 UTC 2011

On 2011-04-01 21:49, ailo wrote:
> I'm not sure how to catch the output.
> I'm not getting any messages to the root shell. Am I supposed to?

I'm not sure I understand your question, but if there is something in 
the /sys/kernel/debug/tracing/trace file that looks interesting you can 
always get it out by e g "cat trace > /tmp/trace.txt", then "chmod 666 
/tmp/trace.txt" or something like that [1]. Or is your problem that the 
/sys/kernel/debug/tracing/trace file is empty?

> I'm testing the 2.6.38-7 -generic, and it is in fact working better than
> before. Almost as well as -lowlatency.

Only almost?
Anyway, that's kind of why I've losing faith in lowlatency personally - 
I have yet to see someone showing me that it actually performs better 
than the generic kernel.

David Henningsson, Canonical Ltd.

[1] I bet there are shell veterans who know how to do that more elegant :-)

More information about the Ubuntu-Studio-devel mailing list