From: paulmck@kernel.org
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
"Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH tip/core/rcu 18/23] torture: Add more tracing crib notes to kvm.sh
Date: Mon, 22 Jun 2020 17:37:47 -0700 [thread overview]
Message-ID: <20200623003752.26872-18-paulmck@kernel.org> (raw)
In-Reply-To: <20200623003731.GA26717@paulmck-ThinkPad-P72>
From: "Paul E. McKenney" <paulmck@kernel.org>
This commit adds a few more hints about how to use tracing as comments
at the end of kvm.sh.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
tools/testing/selftests/rcutorture/bin/kvm.sh | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index 3578c85..bdfa0c0 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -503,3 +503,7 @@ fi
# Tracing: trace_event=rcu:rcu_grace_period,rcu:rcu_future_grace_period,rcu:rcu_grace_period_init,rcu:rcu_nocb_wake,rcu:rcu_preempt_task,rcu:rcu_unlock_preempted_task,rcu:rcu_quiescent_state_report,rcu:rcu_fqs,rcu:rcu_callback,rcu:rcu_kfree_callback,rcu:rcu_batch_start,rcu:rcu_invoke_callback,rcu:rcu_invoke_kfree_callback,rcu:rcu_batch_end,rcu:rcu_torture_read,rcu:rcu_barrier
# Function-graph tracing: ftrace=function_graph ftrace_graph_filter=sched_setaffinity,migration_cpu_stop
# Also --kconfig "CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y"
+# Control buffer size: --bootargs trace_buf_size=3k
+# Get trace-buffer dumps on all oopses: --bootargs ftrace_dump_on_oops
+# Ditto, but dump only the oopsing CPU: --bootargs ftrace_dump_on_oops=orig_cpu
+# Heavy-handed way to also dump on warnings: --bootargs panic_on_warn
--
2.9.5
next prev parent reply other threads:[~2020-06-23 0:38 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 0:37 [PATCH tip/core/rcu 0/23] Torture-test updates for v5.9 Paul E. McKenney
2020-06-23 0:37 ` [PATCH tip/core/rcu 01/23] torture: Remove qemu dependency on EFI firmware paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 02/23] torture: Add script to smoke-test commits in a branch paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 03/23] locktorture: Use true and false to assign to bool variables paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 04/23] rcutorture: Add races with task-exit processing paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 05/23] torture: Set configfile variable to current scenario paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 06/23] rcutorture: Handle non-statistic bang-string error messages paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 07/23] rcutorture: NULL rcu_torture_current earlier in cleanup code paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 08/23] torture: Remove whitespace from identify_qemu_vcpus output paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 09/23] torture: Add --allcpus argument to the kvm.sh script paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 10/23] rcu/rcutorture: Replace 0 with false paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 11/23] torture: Create qemu-cmd in --buildonly runs paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 12/23] torture: Add a stop-run capability paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 13/23] torture: Abstract out console-log error detection paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 14/23] rcutorture: Check for unwatched readers paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 15/23] torture: Pass --kmake-arg to all make invocations paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 16/23] torture: Correctly summarize build-only runs paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 17/23] torture: Improve diagnostic for KCSAN-incapable compilers paulmck
2020-06-23 0:37 ` paulmck [this message]
2020-06-23 0:37 ` [PATCH tip/core/rcu 19/23] torture: Add kvm-tranform.sh script for qemu-cmd files paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 20/23] torture: Dump ftrace at shutdown only if requested paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 21/23] torture: Avoid duplicate specification of qemu command paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 22/23] torture: Remove obsolete "cd $KVM" paulmck
2020-06-23 0:37 ` [PATCH tip/core/rcu 23/23] rcutorture: Remove KCSAN stubs paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 01/10] fork: Annotate a data race in vm_area_dup() paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 02/10] x86/mm/pat: Mark an intentional data race paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 03/10] rculist: Add ASSERT_EXCLUSIVE_ACCESS() to __list_splice_init_rcu() paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 04/10] kcsan: Add test suite paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 05/10] locking/osq_lock: Annotate a data race in osq_lock paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 06/10] kcsan: Prefer '__no_kcsan inline' in test paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 07/10] kcsan: Silence -Wmissing-prototypes warning with W=1 paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 08/10] kcsan: Rename test.c to selftest.c paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 09/10] kcsan: Remove existing special atomic rules paulmck
2020-06-23 0:43 ` [PATCH tip/core/rcu 10/10] kcsan: Add jiffies test to test suite paulmck
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