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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-01-12 23:15:40 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-03-31 22:37:39 +0200 |
| commit | 6b558c4c7a4ba410e39dbcb9d4c2b6e928c09308 (patch) | |
| tree | db3bcb367b47fd09843616d1eef8d25f880fc4d5 /kernel/rcu | |
| parent | rcutorture: Documentation for rcuperf kernel parameters (diff) | |
| download | linux-6b558c4c7a4ba410e39dbcb9d4c2b6e928c09308.tar.xz linux-6b558c4c7a4ba410e39dbcb9d4c2b6e928c09308.zip | |
rcutorture: Bind rcuperf reader/writer kthreads to CPUs
This commit forces more deterministic behavior by binding rcuperf's
rcu_perf_reader() and rcu_perf_writer() kthreads to their respective
CPUs.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcuperf.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index 9d54a57bee7d..7a1edf417d18 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -328,8 +328,10 @@ rcu_perf_reader(void *arg) { unsigned long flags; int idx; + long me = (long)arg; VERBOSE_PERFOUT_STRING("rcu_perf_reader task started"); + set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids)); set_user_nice(current, MAX_NICE); atomic_inc(&n_rcu_perf_reader_started); @@ -362,6 +364,7 @@ rcu_perf_writer(void *arg) WARN_ON(rcu_gp_is_expedited() && !rcu_gp_is_normal() && !gp_exp); WARN_ON(rcu_gp_is_normal() && gp_exp); WARN_ON(!wdpp); + set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids)); t = ktime_get_mono_fast_ns(); if (atomic_inc_return(&n_rcu_perf_writer_started) >= nrealwriters) { t_rcu_perf_writer_started = t; @@ -594,7 +597,7 @@ rcu_perf_init(void) goto unwind; } for (i = 0; i < nrealreaders; i++) { - firsterr = torture_create_kthread(rcu_perf_reader, NULL, + firsterr = torture_create_kthread(rcu_perf_reader, (void *)i, reader_tasks[i]); if (firsterr) goto unwind; |