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rcutorture: Use hrtimers for reader and writer delays 

This commit replaces schedule_timeout_uninterruptible() and
schedule_timeout_interruptible() with torture_hrtimeout_us() and
torture_hrtimeout_jiffies() to avoid timer-wheel synchronization.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-11-17 14:12:24 -08:00
parent ed24affa71
commit 1eba0ef981
1 changed files with 3 additions and 4 deletions
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7
kernel/rcu/rcutorture.c
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@ -1149,7 +1149,7 @@ rcu_torture_writer(void *arg)
do {
rcu_torture_writer_state = RTWS_FIXED_DELAY;
schedule_timeout_uninterruptible(1);
torture_hrtimeout_us(500, 1000, &rand);
rp = rcu_torture_alloc();
if (rp == NULL)
continue;
@ -1290,8 +1290,7 @@ rcu_torture_fakewriter(void *arg)
set_user_nice(current, MAX_NICE);
do {
schedule_timeout_uninterruptible(1 + torture_random(&rand)%10);
udelay(torture_random(&rand) & 0x3ff);
torture_hrtimeout_jiffies(torture_random(&rand) % 10, &rand);
if (cur_ops->cb_barrier != NULL &&
torture_random(&rand) % (nfakewriters * 8) == 0) {
cur_ops->cb_barrier();
@ -1656,7 +1655,7 @@ rcu_torture_reader(void *arg)
if (!rcu_torture_one_read(&rand, myid) && !torture_must_stop())
schedule_timeout_interruptible(HZ);
if (time_after(jiffies, lastsleep) && !torture_must_stop()) {
schedule_timeout_interruptible(1);
torture_hrtimeout_us(500, 1000, &rand);
lastsleep = jiffies + 10;
}
while (num_online_cpus() < mynumonline && !torture_must_stop())