Commit 959954df authored by Joel Fernandes (Google)'s avatar Joel Fernandes (Google) Committed by Paul E. McKenney
Browse files

rcutorture: Output number of elapsed grace periods 



This commit adds code to print the grace-period number at the start
of the test along with both the grace-period number and the number of
elapsed grace periods at the end of the test.  Note that variants of
RCU)without the notion of a grace-period number (for example, Tiny RCU)
just print zeroes.

[ paulmck: Adjust commit log. ]
Signed-off-by: default avatarJoel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 83224afd

kernel/rcu/rcutorture.c

+11 −2
Original line number Diff line number Diff line
@@ -172,6 +172,7 @@ static long n_barrier_successes; /* did rcu_barrier test succeed? */ 
static unsigned long n_read_exits;

static struct list_head rcu_torture_removed;

static unsigned long shutdown_jiffies;

static unsigned long start_gp_seq;



static int rcu_torture_writer_state;

#define RTWS_FIXED_DELAY	0
@@ -2469,8 +2470,9 @@ rcu_torture_cleanup(void) 


	rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);

	srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);

	pr_alert("%s:  End-test grace-period state: g%lu f%#x\n",

		 cur_ops->name, gp_seq, flags);

	pr_alert("%s:  End-test grace-period state: g%ld f%#x total-gps=%ld\n",

		 cur_ops->name, (long)gp_seq, flags,

		 rcutorture_seq_diff(gp_seq, start_gp_seq));

	torture_stop_kthread(rcu_torture_stats, stats_task);

	torture_stop_kthread(rcu_torture_fqs, fqs_task);

	if (rcu_torture_can_boost())
@@ -2594,6 +2596,8 @@ rcu_torture_init(void) 
	long i;

	int cpu;

	int firsterr = 0;

	int flags = 0;

	unsigned long gp_seq = 0;

	static struct rcu_torture_ops *torture_ops[] = {

		&rcu_ops, &rcu_busted_ops, &srcu_ops, &srcud_ops,

		&busted_srcud_ops, &tasks_ops, &tasks_rude_ops,
@@ -2636,6 +2640,11 @@ rcu_torture_init(void) 
			nrealreaders = 1;

	}

	rcu_torture_print_module_parms(cur_ops, "Start of test");

	rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);

	srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);

	start_gp_seq = gp_seq;

	pr_alert("%s:  Start-test grace-period state: g%ld f%#x\n",

		 cur_ops->name, (long)gp_seq, flags);



	/* Set up the freelist. */

CRA Git | Maintained and supported by SUSTech CRA and CCSE