From 2c6c3946c3955f96ae0d48fdac940903918207d8 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Tue, 10 May 2016 23:53:06 +0900 Subject: [PATCH] kselftests/ftrace: Add a test case for event pid filtering Check event is filtered by set_event_pid and options/event-fork. Signed-off-by: Namhyung Kim Signed-off-by: Shuah Khan --- .../ftrace/test.d/event/event-pid.tc | 72 +++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/event/event-pid.tc diff --git a/tools/testing/selftests/ftrace/test.d/event/event-pid.tc b/tools/testing/selftests/ftrace/test.d/event/event-pid.tc new file mode 100644 index 000000000000..d4ab27b522f8 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/event/event-pid.tc @@ -0,0 +1,72 @@ +#!/bin/sh +# description: event tracing - restricts events based on pid + +do_reset() { + echo > set_event + echo > set_event_pid + echo 0 > options/event-fork + 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 + +if [ ! -f set_event_pid ]; then + echo "event pid filtering is not supported" + exit_unsupported +fi + +reset_tracer +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 + +read mypid rest < /proc/self/stat + +echo $mypid > set_event_pid +echo 'sched:sched_switch' > set_event + +yield + +count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l` +if [ $count -ne 0 ]; then + fail "sched_switch events from other task are recorded" +fi + +do_reset + +echo $mypid > set_event_pid +echo 1 > options/event-fork +echo 1 > events/sched/sched_switch/enable + +yield + +count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l` +if [ $count -eq 0 ]; then + fail "sched_switch events from other task are not recorded" +fi + +do_reset + +exit 0