Commit 9ccba350 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

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: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 61b77be0

tools/testing/selftests/rcutorture/bin/kvm.sh

+4 −0
Original line number Diff line number Diff line
@@ -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

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