| From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 06/45] torture: Intensify locking test | Date | Mon, 28 Apr 2014 17:24:54 -0700 |
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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
The current lock_torture_writer() spends too much time sleeping and not enough time hammering locks, as in an eight-CPU test will often only be utilizing a CPU or two. This commit therefore makes lock_torture_writer() sleep less and hammer more.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> --- kernel/locking/locktorture.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c index f26b1a18e34e..b0d3e3c50672 100644 --- a/kernel/locking/locktorture.c +++ b/kernel/locking/locktorture.c @@ -219,7 +219,8 @@ static int lock_torture_writer(void *arg) set_user_nice(current, 19); do { - schedule_timeout_uninterruptible(1); + if ((torture_random(&rand) & 0xfffff) == 0) + schedule_timeout_uninterruptible(1); cur_ops->writelock(); if (WARN_ON_ONCE(lock_is_write_held)) lwsp->n_write_lock_fail++; -- 1.8.1.5
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