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rcutorture: Pretty-print rcutorture reader segments

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The current "Failure/close-call rcutorture reader segments" output is
good and sufficient, but annoying when you have to interpret several
tens of them after an all-night rcutorture run.  This commit therefore
makes them a bit more human-readable.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
This commit is contained in:
Paul E. McKenney 2024-10-29 12:21:28 -07:00 committed by Uladzislau Rezki (Sony)
parent b27a34f908
commit 16338e7cb7
1 changed files with 20 additions and 6 deletions
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26
kernel/rcu/rcutorture.c
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@ -3560,25 +3560,39 @@ rcu_torture_cleanup(void)
pr_alert("\t: No segments recorded!!!\n");
firsttime = 1;
for (i = 0; i < rt_read_nsegs; i++) {
pr_alert("\t%d: %#x ", i, err_segs[i].rt_readstate);
pr_alert("\t%d: %#4x", i, err_segs[i].rt_readstate);
if (err_segs[i].rt_delay_jiffies != 0) {
pr_cont("%s%ldjiffies", firsttime ? "" : "+",
err_segs[i].rt_delay_jiffies);
firsttime = 0;
}
if (IS_ENABLED(CONFIG_RCU_TORTURE_TEST_LOG_CPU))
pr_cont(" CPU %-2d", err_segs[i].rt_cpu);
if (err_segs[i].rt_delay_ms != 0) {
pr_cont("%s%ldms", firsttime ? "" : "+",
pr_cont(" %s%ldms", firsttime ? "" : "+",
err_segs[i].rt_delay_ms);
firsttime = 0;
}
if (err_segs[i].rt_delay_us != 0) {
pr_cont("%s%ldus", firsttime ? "" : "+",
pr_cont(" %s%ldus", firsttime ? "" : "+",
err_segs[i].rt_delay_us);
firsttime = 0;
}
pr_cont("%s", err_segs[i].rt_preempted ? "preempted" : "");
if (IS_ENABLED(CONFIG_RCU_TORTURE_TEST_LOG_CPU))
pr_cont(" CPU %d", err_segs[i].rt_cpu);
pr_cont("%s", err_segs[i].rt_preempted ? " preempted" : "");
if (err_segs[i].rt_readstate & RCUTORTURE_RDR_BH)
pr_cont(" BH");
if (err_segs[i].rt_readstate & RCUTORTURE_RDR_IRQ)
pr_cont(" IRQ");
if (err_segs[i].rt_readstate & RCUTORTURE_RDR_PREEMPT)
pr_cont(" PREEMPT");
if (err_segs[i].rt_readstate & RCUTORTURE_RDR_RBH)
pr_cont(" RBH");
if (err_segs[i].rt_readstate & RCUTORTURE_RDR_SCHED)
pr_cont(" SCHED");
if (err_segs[i].rt_readstate & RCUTORTURE_RDR_RCU_1)
pr_cont(" RCU_1");
if (err_segs[i].rt_readstate & RCUTORTURE_RDR_RCU_2)
pr_cont(" RCU_2");
pr_cont("\n");
}