Hi Gilles,
On Thu, 2008-10-16 at 11:22 +0200, Gilles Carry wrote:
> Before doing any disk I/O, put back thread to SCHED_OTHER/prio 0.
> ---
> testcases/realtime/func/matrix_mult/matrix_mult.c | 13 ++++++++-----
> 1 files changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/testcases/realtime/func/matrix_mult/matrix_mult.c
> b/testcases/realtime/func/matrix_mult/matrix_mult.c
> index 18c3e47..3576427 100644
> --- a/testcases/realtime/func/matrix_mult/matrix_mult.c
> +++ b/testcases/realtime/func/matrix_mult/matrix_mult.c
> @@ -75,10 +75,6 @@ stats_container_t shist, chist;
> static pthread_barrier_t mult_start;
> static pthread_mutex_t mutex_cpu;
>
> -int gettid(void)
> -{
> - return syscall(__NR_gettid);
> -}
Does this change belong here?
I'll let someone comment on the rest... looks fine to me though.
>
> void usage(void)
> {
> @@ -283,12 +279,16 @@ void main_thread(void)
> /* run matrix mult operation sequentially */
> curdat = &sdat;
> printf("\nRunning sequential operations\n");
> + set_priority(PRIO);
> start = rt_gettime();
> for (i = 0; i < iterations; i++)
> matrix_mult_record(MATRIX_SIZE, i);
> end = rt_gettime();
> delta = (long)((end - start)/NS_PER_US);
>
> + /* Go back to normal prio before doing any disk activity */
> + set_priority_other(0);
> +
> savg = delta/iterations; /* don't use the stats record, use the total
> time recorded */
> smin = stats_min(&sdat);
> smax = stats_max(&sdat);
> @@ -309,6 +309,7 @@ void main_thread(void)
> fprintf(stderr, "Warning: could not save sequential mults
> stats\n");
> }
>
> + set_priority(PRIO);
> /* Create numcpus-1 concurrent threads */
> for (j = 0; j < (numcpus-1); j++) {
> tids[j] = create_fifo_thread(concurrent_thread, (void
> *)(intptr_t)j, PRIO);
> @@ -339,6 +340,9 @@ void main_thread(void)
> pthread_mutex_unlock(&t->mutex);
> }
>
> + /* Go back to normal prio before doing any disk activity */
> + set_priority_other(0);
> +
> cavg = delta/iterations; /* don't use the stats record, use the total
> time recorded */
> cmin = stats_min(&cdat);
> cmax = stats_max(&cdat);
> @@ -406,7 +410,6 @@ int main(int argc, char *argv[])
> printf("jvmsim disabled\n");
> }
>
> - set_priority(PRIO);
> main_thread();
>
> join_threads();
--
-tim
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