scheduling policy

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Apparently, one needs to pass the root process ID of 0 in order to change

the policy. Whatever, a subsequent call to sched_getparam passing it the

calling process returns the changed schedule policy value, and a subsequent

sched_setparam call with getpid() also works[/b]

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Here 0 means current calling process instead of root process.

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...so linux is not preempting the first thread to run the second, and so on, which indicates

to me that the scheduling policy change didn&#39;t work[/b]

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why do you expect the second to preempt the first one? All the five thread you have are of the same scheduler policy and the same priority.