diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2024-12-05 14:41:55 -0800 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2025-02-05 07:14:39 -0800 |
| commit | 65e6ff0f31184bd9ce01c7bfef28558e6b70f96a (patch) | |
| tree | c2dce07ce7f19aeb6feda306b42f4e0cf4322dd0 | |
| parent | a8f7c9c4576de902327cff5890d0fe882fb9bada (diff) | |
rcutorture: Add ftrace-compatible timestamp to GP# failure/close-call output
This commit adds an ftrace-compatible microsecond-scale timestamp
to the failure/close-call output, but only in kernels built with
CONFIG_RCU_TORTURE_TEST_LOG_GP=y.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
| -rw-r--r-- | kernel/rcu/rcutorture.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index fb1b80498ae0..1fdadc1df9ad 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -275,6 +275,7 @@ struct rt_read_seg { int rt_end_cpu; unsigned long long rt_gp_seq; unsigned long long rt_gp_seq_end; + u64 rt_ts; }; static int err_segs_recorded; static struct rt_read_seg err_segs[RCUTORTURE_RDR_MAX_SEGS]; @@ -1989,6 +1990,7 @@ static void rcutorture_one_extend(int *readstate, int newstate, bool insoftirq, // Sample grace-period sequence number, as good a place as any. if (IS_ENABLED(CONFIG_RCU_TORTURE_TEST_LOG_GP) && cur_ops->gather_gp_seqs) { rtrsp->rt_gp_seq = cur_ops->gather_gp_seqs(); + rtrsp->rt_ts = ktime_get_mono_fast_ns(); if (!first) rtrsp[-1].rt_gp_seq_end = rtrsp->rt_gp_seq; } @@ -3663,7 +3665,11 @@ 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: %#4x", i, err_segs[i].rt_readstate); + if (IS_ENABLED(CONFIG_RCU_TORTURE_TEST_LOG_GP)) + pr_alert("\t%lluus ", div64_u64(err_segs[i].rt_ts, 1000ULL)); + else + pr_alert("\t"); + pr_cont("%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); |