Author: mmacy
Date: Fri May 11 04:47:05 2018
New Revision: 333479
URL: https://svnweb.freebsd.org/changeset/base/333479
Log:
Test priority handling in epoch test.
- Double the number of test threads to mp_ncpu*2
- Give each thread a different scheduling priority
Modified:
head/sys/tests/epoch/epoch_test.c
Modified: head/sys/tests/epoch/epoch_test.c
==============================================================================
--- head/sys/tests/epoch/epoch_test.c Fri May 11 02:04:01 2018
(r333478)
+++ head/sys/tests/epoch/epoch_test.c Fri May 11 04:47:05 2018
(r333479)
@@ -38,6 +38,8 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
+#include <sys/proc.h>
+#include <sys/sched.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
@@ -132,16 +134,24 @@ static struct epoch_test_instance etilist[MAXCPU];
static int
test_modinit(void)
{
- int i, error;
+ struct thread *td;
+ int i, error, pri_range, pri_off;
+ pri_range = PRI_MIN_TIMESHARE - PRI_MIN_REALTIME;
test_epoch = epoch_alloc();
- for (i = 0; i < mp_ncpus; i++) {
+ for (i = 0; i < mp_ncpus*2; i++) {
etilist[i].threadid = i;
error = kthread_add(testloop, &etilist[i], NULL,
&testthreads[i],
0, 0, "epoch_test_%d",
i);
if (error) {
printf("%s: kthread_add(epoch_test): error %d",
__func__,
error);
+ } else {
+ pri_off = (i*4)%pri_range;
+ td = testthreads[i];
+ thread_lock(td);
+ sched_prio(td, PRI_MIN_REALTIME + pri_off);
+ thread_unlock(td);
}
}
inited = 1;
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