20 Nov
2007
20 Nov
'07
4:25 a.m.
On Monday 19 November 2007, David Causse wrote:
Ken Restivo a écrit :
hum? SCHED_FIFO is one of the posix realtime scheduling classes. the -f option
to chrt chooses this scheduling class.
SCHED_RT has different semantics (though also being a reatime scheduling
class). Which one you want depends on your needs. For most audio stuff
SCHED_FIFO is appropriate..
So chrt -f -p 81 will make your process the top priority in the system given
there's no higher one [doh!] ;)
Regards,
Flo
--
Palimm Palimm!
http://tapas.affenbande.org
I'm having a bit of difficulty getting chrt
to, um, chrt.
I've written a little MIDI-processing daemon and I want it to run with
high priority. It is very small and tight and I don't expect it to take
up much CPU, but I definitely want it running first.
So I do this:
sudo /usr/bin/chrt -f -p 81 `pidof mydaemon`
And then I do this:
ps -Leo pid,class,rtprio,ni,pri,pcpu,stat,comm --sort -rtprio
And... my daemon does *not* show up in the process list at all.
Try this :
ps Haxo pid,class,rtprio,ni,pri,pcpu,stat,comm --sort=-rtprio
--sort seems to skip some processes with the -edf syntax style, I don't
know why...
But your process won't be on top because you have set the SCHED_FIFO
wich is not rtprio.
You should use :
chrt -p 81 `pidof mydaemon`
SCHED_RT is the default.