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McKenney" , rcu@vger.kernel.org, Steven Rostedt , "Uladzislau Rezki (Sony)" Subject: [PATCH 7/7] rcutorture: Add number of GP information to reports Date: Thu, 18 Jun 2020 16:29:55 -0400 Message-Id: <20200618202955.4024-7-joel@joelfernandes.org> X-Mailer: git-send-email 2.27.0.111.gc72c7da667-goog In-Reply-To: <20200618202955.4024-1-joel@joelfernandes.org> References: <20200618202955.4024-1-joel@joelfernandes.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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) --- 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