mirror of
https://github.com/torvalds/linux.git
synced 2026-04-19 15:24:02 -04:00
07b60713b5
When running event-no-pid test on small machines (e.g. cloud 1-core
instance), other events might not happen:
+ cat trace
+ cnt=0
+ [ 0 -eq 0 ]
+ fail No other events were recorded
[15] event tracing - restricts events based on pid notrace filtering [FAIL]
Schedule a simple sleep task to be sure that some other process events
get recorded.
Fixes: ebed9628f5 ("selftests/ftrace: Add test to test new set_event_notrace_pid file")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
124 lines
2.2 KiB
Bash
124 lines
2.2 KiB
Bash
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
# description: event tracing - restricts events based on pid notrace filtering
|
|
# requires: set_event events/sched set_event_pid set_event_notrace_pid
|
|
# flags: instance
|
|
|
|
do_reset() {
|
|
echo > set_event
|
|
echo > set_event_pid
|
|
echo > set_event_notrace_pid
|
|
echo 0 > options/event-fork
|
|
echo 0 > events/enable
|
|
clear_trace
|
|
echo 1 > tracing_on
|
|
}
|
|
|
|
fail() { #msg
|
|
cat trace
|
|
do_reset
|
|
echo $1
|
|
exit_fail
|
|
}
|
|
|
|
count_pid() {
|
|
pid=$@
|
|
cat trace | grep -v '^#' | sed -e 's/[^-]*-\([0-9]*\).*/\1/' | grep $pid | wc -l
|
|
}
|
|
|
|
count_no_pid() {
|
|
pid=$1
|
|
cat trace | grep -v '^#' | sed -e 's/[^-]*-\([0-9]*\).*/\1/' | grep -v $pid | wc -l
|
|
}
|
|
|
|
enable_system() {
|
|
system=$1
|
|
|
|
if [ -d events/$system ]; then
|
|
echo 1 > events/$system/enable
|
|
fi
|
|
}
|
|
|
|
enable_events() {
|
|
echo 0 > tracing_on
|
|
# Enable common groups of events, as all events can allow for
|
|
# events to be traced via scheduling that we don't care to test.
|
|
enable_system syscalls
|
|
enable_system rcu
|
|
enable_system block
|
|
enable_system exceptions
|
|
enable_system irq
|
|
enable_system net
|
|
enable_system power
|
|
enable_system signal
|
|
enable_system sock
|
|
enable_system timer
|
|
enable_system thermal
|
|
echo 1 > tracing_on
|
|
}
|
|
|
|
other_task() {
|
|
sleep .001 || usleep 1 || sleep 1
|
|
}
|
|
|
|
echo 0 > options/event-fork
|
|
|
|
do_reset
|
|
|
|
read mypid rest < /proc/self/stat
|
|
|
|
echo $mypid > set_event_notrace_pid
|
|
grep -q $mypid set_event_notrace_pid
|
|
|
|
enable_events
|
|
|
|
yield
|
|
|
|
echo 0 > tracing_on
|
|
|
|
cnt=`count_pid $mypid`
|
|
if [ $cnt -ne 0 ]; then
|
|
fail "Filtered out task has events"
|
|
fi
|
|
|
|
cnt=`count_no_pid $mypid`
|
|
if [ $cnt -eq 0 ]; then
|
|
fail "No other events were recorded"
|
|
fi
|
|
|
|
do_reset
|
|
|
|
echo $mypid > set_event_notrace_pid
|
|
echo 1 > options/event-fork
|
|
|
|
enable_events
|
|
|
|
yield &
|
|
child=$!
|
|
echo "child = $child"
|
|
wait $child
|
|
|
|
# Be sure some other events will happen for small systems (e.g. 1 core)
|
|
other_task
|
|
|
|
echo 0 > tracing_on
|
|
|
|
cnt=`count_pid $mypid`
|
|
if [ $cnt -ne 0 ]; then
|
|
fail "Filtered out task has events"
|
|
fi
|
|
|
|
cnt=`count_pid $child`
|
|
if [ $cnt -ne 0 ]; then
|
|
fail "Child of filtered out taskhas events"
|
|
fi
|
|
|
|
cnt=`count_no_pid $mypid`
|
|
if [ $cnt -eq 0 ]; then
|
|
fail "No other events were recorded"
|
|
fi
|
|
|
|
do_reset
|
|
|
|
exit 0
|