Commit-ID: 2094c99558d9e9374210898f65f5862f7a2e8bed
Gitweb: http://git.kernel.org/tip/2094c99558d9e9374210898f65f5862f7a2e8bed
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 12 Jan 2016 15:17:21 -0800
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 31 Mar 2016 13:37:39 -0700
rcutorture: Set rcuperf writer kthreads to real-time priority
This commit forces more deterministic update-side behavior by setting
rcuperf's rcu_perf_writer() kthreads to real-time priority.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/rcuperf.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index 7a1edf4..e18d016 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -355,6 +355,7 @@ rcu_perf_writer(void *arg)
int i = 0;
int i_max;
long me = (long)arg;
+ struct sched_param sp;
bool started = false, done = false, alldone = false;
u64 t;
u64 *wdp;
@@ -365,6 +366,8 @@ rcu_perf_writer(void *arg)
WARN_ON(rcu_gp_is_normal() && gp_exp);
WARN_ON(!wdpp);
set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids));
+ sp.sched_priority = 1;
+ sched_setscheduler_nocheck(current, SCHED_FIFO, &sp);
t = ktime_get_mono_fast_ns();
if (atomic_inc_return(&n_rcu_perf_writer_started) >= nrealwriters) {
t_rcu_perf_writer_started = t;
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|