What priority to use calling sched_setscheduler
By Daniel Rodriguez •
I am writing a server that I do not want preempted by any other user process or "low priority" kernel process. I'm using code like this:
struct sched_param sched_param;
memset(&sched_param, 0, sizeof(sched_param));
sched_param.sched_priority = SOME_PRIORITY;
if(-1 == sched_setscheduler(0, SCHED_FIFO, &sched_param)) { // ...My problem is that when I set SOME_PRIORITY to be 99 (the max value), it appears that I starve out even the scheduler process, and my system quickly becomes unusable (the server process has a busywait loop at its core--I have no control over tihs aspect, it's a third party library).
So my question is, what value for SOME_PRIORITY can I use to only allow preemption by the scheduler (and possibly some small subset of kernel services)?
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