Mark,
Two questions
1) Do threads inherrit the schedule priority? Or do I need to set this for every
thread
2) If there is nothing else runnable in my system, will this help? or is it
effectively the same?
Thanks
Lee
----- Original Message -----
From: Mark Hahn <[EMAIL PROTECTED]>
Date: Wed, 11 Jun 2003 21:02:17 -0400 (EDT)
To: Lee Chin <[EMAIL PROTECTED]>
Subject: Re: usleep
> > Any way... what is setrealtime? I dont have it on my linux machine
>
> it's a simple tool I wrote a long time ago, code below.
> ***** N O T E *******
> it can effectively freeze your machine, since it gives you a process
> which will not be prempted! it *is* useful, though, if you know
> what you're doing...
> ***** N O T E *******
>
> #include <unistd.h>
> #include <stdlib.h>
> #include <stdio.h>
> #include <sched.h>
> /* setrealtime: run procs in realtime.
> author: Mark Hahn <[EMAIL PROTECTED]> */
>
> int main(int argc, char *argv[]) {
> static struct sched_param sched_parms;
> int pid, wrapper=0;
>
> if (argc <= 1)
> return 1;
>
> pid = atoi(argv[1]);
>
> if (!pid || argc != 2) {
> wrapper = 1;
> pid = getpid();
> }
> if (!pid)
> return 1;
>
> sched_parms.sched_priority = sched_get_priority_min(SCHED_FIFO);
> if (sched_setscheduler(pid, SCHED_FIFO, &sched_parms) == -1) {
> perror("cannot set realtime scheduling policy");
> return 1;
> }
> if (wrapper) {
> setuid(getuid());
> execvp(argv[1],&argv[1]);
> perror("exec failed");
> return 1;
> }
> return 0;
> }
>
--
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