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srcutorture: Print Tiny SRCU reader statistics

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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>
This commit is contained in:
Paul E. McKenney 2017-03-25 11:34:42 -07:00
parent d8be81735a
commit 32071141b2
1 changed files with 11 additions and 4 deletions
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15
kernel/rcu/rcutorture.c
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@ -559,11 +559,12 @@ static void srcu_torture_barrier(void)
static void srcu_torture_stats(void) static void srcu_torture_stats(void)
{ {
#ifdef CONFIG_TREE_SRCU int __maybe_unused cpu;
int cpu; int idx;
int idx = srcu_ctlp->completed & 0x1;
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); torture_type, TORTURE_FLAG, idx);
for_each_possible_cpu(cpu) { for_each_possible_cpu(cpu) {
unsigned long l0, l1; unsigned long l0, l1;
@ -588,6 +589,12 @@ static void srcu_torture_stats(void)
pr_cont(" %d(%ld,%ld)", cpu, c0, c1); pr_cont(" %d(%ld,%ld)", cpu, c0, c1);
} }
pr_cont("\n"); 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 #endif
} }