forked from luck/tmp_suning_uos_patched
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: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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@ -172,6 +172,7 @@ static long n_barrier_successes; /* did rcu_barrier test succeed? */
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static unsigned long n_read_exits;
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static struct list_head rcu_torture_removed;
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static unsigned long shutdown_jiffies;
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static unsigned long start_gp_seq;
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static int rcu_torture_writer_state;
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#define RTWS_FIXED_DELAY 0
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@ -2469,8 +2470,9 @@ rcu_torture_cleanup(void)
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rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
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srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
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pr_alert("%s: End-test grace-period state: g%lu f%#x\n",
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cur_ops->name, gp_seq, flags);
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pr_alert("%s: End-test grace-period state: g%ld f%#x total-gps=%ld\n",
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cur_ops->name, (long)gp_seq, flags,
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rcutorture_seq_diff(gp_seq, start_gp_seq));
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torture_stop_kthread(rcu_torture_stats, stats_task);
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torture_stop_kthread(rcu_torture_fqs, fqs_task);
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if (rcu_torture_can_boost())
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@ -2594,6 +2596,8 @@ rcu_torture_init(void)
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long i;
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int cpu;
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int firsterr = 0;
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int flags = 0;
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unsigned long gp_seq = 0;
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static struct rcu_torture_ops *torture_ops[] = {
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&rcu_ops, &rcu_busted_ops, &srcu_ops, &srcud_ops,
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&busted_srcud_ops, &tasks_ops, &tasks_rude_ops,
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@ -2636,6 +2640,11 @@ rcu_torture_init(void)
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nrealreaders = 1;
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}
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rcu_torture_print_module_parms(cur_ops, "Start of test");
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rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
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srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
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start_gp_seq = gp_seq;
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pr_alert("%s: Start-test grace-period state: g%ld f%#x\n",
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cur_ops->name, (long)gp_seq, flags);
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/* Set up the freelist. */
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