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| author | Paul E. McKenney | 2020-05-26 10:57:34 -0700 |
|---|---|---|
| committer | Paul E. McKenney | 2020-06-29 12:00:45 -0700 |
| commit | b864f89ff61492f56b4e8c6713a5efec6540a0e2 (patch) | |
| tree | fc58c549c9878565559b223f596ac9289fdb7423 /lib/test_ubsan.c | |
| parent | 2990750bceb05c3cdeae3a6d2683cbc4ae4de15e (diff) | |
refperf: Tune reader measurement interval
This commit moves a printk() out of the measurement interval, converts
a atomic_dec()/atomic_read() pair to atomic_dec_and_test(), and adds
a smp_mb__before_atomic() to avoid potential wake/wait hangs. These
changes have the added benefit of reducing the number of loops required
for amortizing loop overhead for CONFIG_PREEMPT=n RCU measurements from
1,000,000 to 10,000. This reduction in turn shortens the test, reducing
the probability of interference.
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'lib/test_ubsan.c')
0 files changed, 0 insertions, 0 deletions