1 #!/bin/sh 2 # SPDX-License-Identifier: GPL-2.0 3 # description: event tracing - enable/disable with subsystem level files 4 # flags: instance 5 6 do_reset() { 7 echo > set_event 8 clear_trace 9 } 10 11 fail() { #msg 12 do_reset 13 echo $1 14 exit_fail 15 } 16 17 yield() { 18 ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1 19 } 20 21 if [ ! -f set_event -o ! -d events/sched ]; then 22 echo "event tracing is not supported" 23 exit_unsupported 24 fi 25 26 reset_tracer 27 do_reset 28 29 echo 'sched:*' > set_event 30 31 yield 32 33 count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` 34 if [ $count -lt 3 ]; then 35 fail "at least fork, exec and exit events should be recorded" 36 fi 37 38 do_reset 39 40 echo 1 > events/sched/enable 41 42 yield 43 44 count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` 45 if [ $count -lt 3 ]; then 46 fail "at least fork, exec and exit events should be recorded" 47 fi 48 49 do_reset 50 51 echo 0 > events/sched/enable 52 53 yield 54 55 count=`cat trace | grep -v ^# | awk '{ print $5 }' | sort -u | wc -l` 56 if [ $count -ne 0 ]; then 57 fail "any of scheduler events should not be recorded" 58 fi 59 60 do_reset 61 62 exit 0 63
