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    SubjectRe: 2.6.4-mm1
    Anton Blanchard wrote:

    >
    >
    >>- The CPU scheduler changes in -mm (sched-domains) have been hanging about
    >> for too long. I had been hoping that the people who care about SMT and
    >> NUMA performance would have some results by now but all seems to be silent.
    >>
    >> I do not wish to merge these up until the big-iron guys can say that they
    >> suit their requirements, with a reasonable expectation that we will not
    >> need to churn this code later in the 2.6 series.
    >>
    >> So. If you have been testing, please speak up. If you have not been
    >> testing, please do so.
    >>
    >
    >I sucked sched-* out of mm, added sched-ppc64bits (attached) and am
    >having problems with the following threaded test case. NUMA is enabled.
    >
    >#include <pthread.h>
    >#define NR_THREADS 100
    >
    >void dostuff(void *junk)
    >{
    > while(1)
    > ;
    >}
    >
    >int main()
    >{
    > int i;
    > pthread_t tid;
    >
    > for (i = 0; i < NR_THREADS-1; i++)
    > pthread_create(&tid, NULL, dostuff, NULL);
    >
    > dostuff(NULL);
    >}
    >
    >100 runnable threads but we never use more than one cpu:
    >

    OK thanks. This is probably a simple bug somewhere. I'll have a look
    at it soon.


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