Real time scheduling and 2.2.2 SMP

Sebastien Plante (sebasp@cae.ca)
Wed, 03 Mar 1999 10:15:37 -0500

I have a dual Pentium II 450Mhz with 128M. I tested the real-time scheduling on
the kernel 2.2.2 and got unexpected results. I ran the following test program.
On a kernel 2.0.36, the process takes all the cpu time on one cpu, but because I
have 2 cpu, the computer sill responds very well. If I do the same test on an
kernel 2.2.2, the computer reacts like I would have only one cpu. TOP shows
that the other cpu is 100% idle. Has someone ever had the same problem?

#include <sched.h>
main()
{
struct sched_param sparam;

sparam.sched_priority = 99;
sched_setscheduler(0,SCHED_FIFO,&sparam);

while(1){}
}

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