Scheduler in SMP
joel.sherrill at OARcorp.com
Fri Sep 28 19:42:23 UTC 2012
On 09/28/2012 02:28 PM, Matias Vara wrote:
> Hi everyone,
> I am playing with the samples of RTEMS for SMP. I am trying understand
> the example in /smp01, this one creates one task per processor but I
> cannot figure out how the task is set in a given processor. Are there
> any parameter when the task is created?
This would be called task processor affinity and it is not currently
supported. It was left as a future enhancement.
The current smptests were not designed to show off smp but to
debug it and to get coverage.
The magic of assigning a task to a core is in the scheduler. It is
in cpukit/score/src/schedulersimplesmp*. It is logically intended to
be the same as the single core scheduler but place the top N
tasks onto the N cores. It takes into account priority, preemption,
FIFO per priority, and timeslicing just like the single core priority
> Thanks in advance.
Joel Sherrill, Ph.D. Director of Research& Development
joel.sherrill at OARcorp.com On-Line Applications Research
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