Commit 32071141 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

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: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent d8be8173

kernel/rcu/rcutorture.c

+11 −4
Original line number Diff line number Diff line
@@ -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

}