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rcutorture: Print forward-progress test age upon failure 

This commit prints the age of the forward-progress test in jiffies,
in order to allow better interpretation of the callback-invocation
histograms.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-10-04 10:54:22 -07:00
parent c51d7b5e6c
commit 73d665b141
1 changed files with 2 additions and 1 deletions
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3
kernel/rcu/rcutorture.c
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@ -1639,7 +1639,8 @@ static void rcu_torture_fwd_cb_hist(void)
for (i = ARRAY_SIZE(n_launders_hist) - 1; i > 0; i--)
if (n_launders_hist[i] > 0)
break;
pr_alert("%s: Callback-invocation histogram:", __func__);
pr_alert("%s: Callback-invocation histogram (duration %lu jiffies):",
__func__, jiffies - rcu_fwd_startat);
for (j = 0; j <= i; j++)
pr_cont(" %ds: %ld", j + 1, n_launders_hist[j]);
pr_cont("\n");