| #!/bin/sh |
| # SPDX-License-Identifier: GPL-2.0 |
| # description: event tracing - enable/disable with event level files |
| # flags: instance |
| |
| do_reset() { |
| echo > set_event |
| clear_trace |
| } |
| |
| fail() { #msg |
| do_reset |
| echo $1 |
| exit_fail |
| } |
| |
| yield() { |
| ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1 |
| } |
| |
| if [ ! -f set_event -o ! -d events/sched ]; then |
| echo "event tracing is not supported" |
| exit_unsupported |
| fi |
| |
| reset_tracer |
| do_reset |
| |
| echo 'sched:sched_switch' > set_event |
| |
| yield |
| |
| count=`cat trace | grep sched_switch | wc -l` |
| if [ $count -eq 0 ]; then |
| fail "sched_switch events are not recorded" |
| fi |
| |
| do_reset |
| |
| echo 1 > events/sched/sched_switch/enable |
| |
| yield |
| |
| count=`cat trace | grep sched_switch | wc -l` |
| if [ $count -eq 0 ]; then |
| fail "sched_switch events are not recorded" |
| fi |
| |
| do_reset |
| |
| echo 0 > events/sched/sched_switch/enable |
| |
| yield |
| |
| count=`cat trace | grep sched_switch | wc -l` |
| if [ $count -ne 0 ]; then |
| fail "sched_switch events should not be recorded" |
| fi |
| |
| do_reset |
| |
| exit 0 |