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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-03-25 19:34:42 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-04-18 20:38:22 +0200 |
| commit | 32071141b2448458479932fe726ce892cbe1b4e4 (patch) | |
| tree | 32522731791017e641e181c72ee73fb3e1260ec0 /kernel/rcu | |
| parent | srcu: Create a tiny SRCU (diff) | |
| download | linux-32071141b2448458479932fe726ce892cbe1b4e4.tar.xz linux-32071141b2448458479932fe726ce892cbe1b4e4.zip | |
srcutorture: Print Tiny SRCU reader statistics
The srcu_torture_stats() function is adapted to the specific srcu_struct
layout traditionally used by SRCU. This commit therefore adds support
for Tiny SRCU.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 98591e16db1a..9cbb8a7b909d 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -559,11 +559,12 @@ static void srcu_torture_barrier(void) static void srcu_torture_stats(void) { -#ifdef CONFIG_TREE_SRCU - int cpu; - int idx = srcu_ctlp->completed & 0x1; + int __maybe_unused cpu; + int idx; - pr_alert("%s%s per-CPU(idx=%d):", +#ifdef CONFIG_TREE_SRCU + idx = srcu_ctlp->completed & 0x1; + pr_alert("%s%s Tree SRCU per-CPU(idx=%d):", torture_type, TORTURE_FLAG, idx); for_each_possible_cpu(cpu) { unsigned long l0, l1; @@ -588,6 +589,12 @@ static void srcu_torture_stats(void) pr_cont(" %d(%ld,%ld)", cpu, c0, c1); } pr_cont("\n"); +#elif defined(CONFIG_TINY_SRCU) + idx = READ_ONCE(srcu_ctlp->srcu_idx) & 0x1; + pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%d,%d)\n", + torture_type, TORTURE_FLAG, idx, + READ_ONCE(srcu_ctlp->srcu_lock_nesting[!idx]), + READ_ONCE(srcu_ctlp->srcu_lock_nesting[idx])); #endif } |