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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-06-16 11:16:18 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-06-29 12:01:45 -0700 |
| commit | 9ccba350bd824ecacbfd8965f4f3ac980b96f951 (patch) | |
| tree | 2e6f1cb446bc3af6ac6a6b4d99b2f9d54bb61cf7 /tools/testing/selftests/rcutorture/bin/kvm.sh | |
| parent | 61b77be09e29e6dc152b1984691e5b1708e8a6ac (diff) | |
torture: Add more tracing crib notes to kvm.sh
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>
Diffstat (limited to 'tools/testing/selftests/rcutorture/bin/kvm.sh')
| -rwxr-xr-x | tools/testing/selftests/rcutorture/bin/kvm.sh | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh index 3578c85ea8c4..bdfa0c076ae6 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 |