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| author |   Paul E. McKenney <paulmck@kernel.org> | 2024-10-21 07:07:47 -0700 |
|---|---|---|
| committer |   Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-12-14 17:02:28 +0100 |
| commit | 7b6c1648bb6e041b3f2284b7f602283adc852bb7 (patch) | |
| tree | 682ce45e4428f4254c36bf5d6d0738298d5198ac | |
| parent | rcutorture: Decorate failing reader segments with CPU ID (diff) | |
| download | linux-rng-7b6c1648bb6e041b3f2284b7f602283adc852bb7.tar.xz linux-rng-7b6c1648bb6e041b3f2284b7f602283adc852bb7.zip | |
rcutorture: Use finer-grained timeouts for rcu_torture_writer() polling
The rcu_torture_writer() polling currently uses timeouts ranging from
zero to 16 milliseconds to wait for the polled grace period to end.
This works, but it would be better to have a higher probability of
exercising races with the code that cleans up after a grace period.
This commit therefore switches from these millisecond-scale timeouts
to timeouts ranging from zero to 128 microseconds, and with a full
microsecond's worth of timeout fuzz.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
| -rw-r--r-- | kernel/rcu/rcutorture.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 0bc6fc582215..6067f2740247 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1561,8 +1561,8 @@ rcu_torture_writer(void *arg) break; } WARN_ON_ONCE(ulo_size > 0 && i >= ulo_size); - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); } rcu_torture_pipe_update(old_rp); break; @@ -1582,8 +1582,8 @@ rcu_torture_writer(void *arg) break; } WARN_ON_ONCE(rgo_size > 0 && i >= rgo_size); - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); } rcu_torture_pipe_update(old_rp); break; @@ -1592,8 +1592,8 @@ rcu_torture_writer(void *arg) gp_snap = cur_ops->start_gp_poll_exp(); rcu_torture_writer_state = RTWS_POLL_WAIT_EXP; while (!cur_ops->poll_gp_state_exp(gp_snap)) - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); rcu_torture_pipe_update(old_rp); break; case RTWS_POLL_GET_EXP_FULL: @@ -1601,8 +1601,8 @@ rcu_torture_writer(void *arg) cur_ops->start_gp_poll_exp_full(&gp_snap_full); rcu_torture_writer_state = RTWS_POLL_WAIT_EXP_FULL; while (!cur_ops->poll_gp_state_full(&gp_snap_full)) - torture_hrtimeout_jiffies(torture_random(&rand) % 16, - &rand); + torture_hrtimeout_us(torture_random(&rand) % 128, 1000, + &rand); rcu_torture_pipe_update(old_rp); break; case RTWS_SYNC: |