On Aug 21, 2008, at 2:04 PM, Wojciech Puchar wrote:
i run such command

/usr/sbin/rtprio 31 /usr/bin/su centrala -c \
"/usr/local/bin/asterisk -C /centrala/etc/asterisk.conf"

tu run (at startup) asterisk PBX as user centrala with realtime priority.

asterisk is started, but without realtime priority.

Yes, you'd be running the su process with realtime priority.  :-)

how to do this right?

i run asterisk as user (not root), but this server is used to other things, so asterisk must have absolute priority over other things. now i have to do this manually by searching for asterisk's PID and doing

rtprio 31 -PID

Well, you have to run rtprio as root, or else make it setuid-root (which probably isn't a great idea). Presumably this thing has a startup script which runs it, and it probably creates a PID file under /var/run which you could use to adjust the priority during system startup via:

  rtprio 31 -`cat /var/run/asterix.pid`


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