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);
-}
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();
--
1.5.5.GIT
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