1#!/bin/sh 2# description: event tracing - enable/disable with event level files 3 4do_reset() { 5 echo > set_event 6 clear_trace 7} 8 9fail() { #msg 10 do_reset 11 echo $1 12 exit $FAIL 13} 14 15yield() { 16 ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1 17} 18 19if [ ! -f set_event -o ! -d events/sched ]; then 20 echo "event tracing is not supported" 21 exit_unsupported 22fi 23 24reset_tracer 25do_reset 26 27echo 'sched:sched_switch' > set_event 28 29yield 30 31count=`cat trace | grep sched_switch | wc -l` 32if [ $count -eq 0 ]; then 33 fail "sched_switch events are not recorded" 34fi 35 36do_reset 37 38echo 1 > events/sched/sched_switch/enable 39 40yield 41 42count=`cat trace | grep sched_switch | wc -l` 43if [ $count -eq 0 ]; then 44 fail "sched_switch events are not recorded" 45fi 46 47do_reset 48 49echo 0 > events/sched/sched_switch/enable 50 51yield 52 53count=`cat trace | grep sched_switch | wc -l` 54if [ $count -ne 0 ]; then 55 fail "sched_switch events should not be recorded" 56fi 57 58do_reset 59 60exit 0 61