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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-01-13 00:17:21 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-03-31 22:37:39 +0200 |
| commit | 2094c99558d9e9374210898f65f5862f7a2e8bed (patch) | |
| tree | 4c8495b39361cfb2868350f9024794b397be08b9 | |
| parent | rcutorture: Bind rcuperf reader/writer kthreads to CPUs (diff) | |
| download | linux-2094c99558d9e9374210898f65f5862f7a2e8bed.tar.xz linux-2094c99558d9e9374210898f65f5862f7a2e8bed.zip | |
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@linux.vnet.ibm.com>
| -rw-r--r-- | kernel/rcu/rcuperf.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index 7a1edf417d18..e18d016a9888 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; |