From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
To: linux-kernel@vger.kernel.org
Cc: "Joel Fernandes (Google)" <joel@joelfernandes.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Ingo Molnar <mingo@redhat.com>,
Josh Triplett <josh@joshtriplett.org>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Marco Elver <elver@google.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
rcu@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>,
"Uladzislau Rezki (Sony)" <urezki@gmail.com>
Subject: [PATCH 7/7] rcutorture: Add number of GP information to reports
Date: Thu, 18 Jun 2020 16:29:55 -0400 [thread overview]
Message-ID: <20200618202955.4024-7-joel@joelfernandes.org> (raw)
In-Reply-To: <20200618202955.4024-1-joel@joelfernandes.org>
Add 2 things to get visiblity around number of grace periods.
1. Add number of GPs to End-state print.
2. Just like End-state, add GP state to Start-state.
This helps determine how many GPs elapsed during a run of rcutorture and
what the initial state was.
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
kernel/rcu/rcutorture.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 959a1f84d6904..c80725ddd9030 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -186,6 +186,7 @@ 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
@@ -2508,8 +2509,9 @@ 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())
@@ -2633,6 +2635,8 @@ 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,
@@ -2675,6 +2679,11 @@ 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. */
--
2.27.0.111.gc72c7da667-goog
next prev parent reply other threads:[~2020-06-18 20:30 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-18 20:29 [PATCH 1/7] rcu/segcblist: Prevent useless GP start if no CBs to accelerate Joel Fernandes (Google)
2020-06-18 20:29 ` [PATCH 2/7] rcu/trace: Add tracing for how segcb list changes Joel Fernandes (Google)
2020-06-18 22:16 ` Paul E. McKenney
2020-06-18 23:52 ` Joel Fernandes
2020-06-18 20:29 ` [PATCH 3/7] rcu/trace: Add name of the source for gp_seq Joel Fernandes (Google)
2020-06-18 22:19 ` Paul E. McKenney
2020-06-18 23:51 ` Joel Fernandes
2020-06-19 0:12 ` Paul E. McKenney
2020-06-19 0:56 ` Joel Fernandes
2020-06-19 1:08 ` Joel Fernandes
2020-06-19 0:01 ` Steven Rostedt
2020-06-19 1:01 ` Joel Fernandes
2020-06-18 20:29 ` [PATCH 4/7] rcu/trace: Print negative GP numbers correctly Joel Fernandes (Google)
2020-06-18 22:30 ` Paul E. McKenney
2020-06-18 20:29 ` [PATCH 5/7] rcu/trace: Use rsp's gp_seq in acceleration's rcu_grace_period tracepoint Joel Fernandes (Google)
2020-06-18 22:27 ` Paul E. McKenney
2020-06-18 23:54 ` Joel Fernandes
2020-06-18 20:29 ` [PATCH 6/7] rcutorture: Add support to get the number of wakeups of main GP kthread Joel Fernandes (Google)
2020-06-18 22:40 ` Paul E. McKenney
2020-06-19 0:01 ` Joel Fernandes
2020-06-19 0:12 ` Paul E. McKenney
2020-06-19 1:00 ` Joel Fernandes
2020-06-19 3:23 ` Paul E. McKenney
2020-06-18 20:29 ` Joel Fernandes (Google) [this message]
2020-06-18 23:27 ` [PATCH 7/7] rcutorture: Add number of GP information to reports Paul E. McKenney
2020-06-18 22:11 ` [PATCH 1/7] rcu/segcblist: Prevent useless GP start if no CBs to accelerate Paul E. McKenney
2020-06-18 23:09 ` Paul E. McKenney
2020-06-19 0:04 ` Joel Fernandes
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