mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
80c3e28528
Add a testcase for poll() on hist file. This introduces a helper binary to the ftracetest, because there is no good way to reliably execute poll() on hist file. Cc: Shuah Khan <shuah@kernel.org> Cc: Tom Zanussi <zanussi@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Link: https://lore.kernel.org/173547867935.569911.10127126796879854182.stgit@devnote2 Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
74 lines
1.5 KiB
Bash
74 lines
1.5 KiB
Bash
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
# description: event trigger - test poll wait on histogram
|
|
# requires: set_event events/sched/sched_process_free/trigger events/sched/sched_process_free/hist
|
|
# flags: instance
|
|
|
|
POLL=${FTRACETEST_ROOT}/poll
|
|
|
|
if [ ! -x ${POLL} ]; then
|
|
echo "poll program is not compiled!"
|
|
exit_unresolved
|
|
fi
|
|
|
|
EVENT=events/sched/sched_process_free/
|
|
|
|
# Check poll ops is supported. Before implementing poll on hist file, it
|
|
# returns soon with POLLIN | POLLOUT, but not POLLPRI.
|
|
|
|
# This must wait >1 sec and return 1 (timeout).
|
|
set +e
|
|
${POLL} -I -t 1000 ${EVENT}/hist
|
|
ret=$?
|
|
set -e
|
|
if [ ${ret} != 1 ]; then
|
|
echo "poll on hist file is not supported"
|
|
exit_unsupported
|
|
fi
|
|
|
|
# Test POLLIN
|
|
echo > trace
|
|
echo 'hist:key=comm if comm =="sleep"' > ${EVENT}/trigger
|
|
echo 1 > ${EVENT}/enable
|
|
|
|
# This sleep command will exit after 2 seconds.
|
|
sleep 2 &
|
|
BGPID=$!
|
|
# if timeout happens, poll returns 1.
|
|
${POLL} -I -t 4000 ${EVENT}/hist
|
|
echo 0 > tracing_on
|
|
|
|
if [ -d /proc/${BGPID} ]; then
|
|
echo "poll exits too soon"
|
|
kill -KILL ${BGPID} ||:
|
|
exit_fail
|
|
fi
|
|
|
|
if ! grep -qw "sleep" trace; then
|
|
echo "poll exits before event happens"
|
|
exit_fail
|
|
fi
|
|
|
|
# Test POLLPRI
|
|
echo > trace
|
|
echo 1 > tracing_on
|
|
|
|
# This sleep command will exit after 2 seconds.
|
|
sleep 2 &
|
|
BGPID=$!
|
|
# if timeout happens, poll returns 1.
|
|
${POLL} -P -t 4000 ${EVENT}/hist
|
|
echo 0 > tracing_on
|
|
|
|
if [ -d /proc/${BGPID} ]; then
|
|
echo "poll exits too soon"
|
|
kill -KILL ${BGPID} ||:
|
|
exit_fail
|
|
fi
|
|
|
|
if ! grep -qw "sleep" trace; then
|
|
echo "poll exits before event happens"
|
|
exit_fail
|
|
fi
|
|
|
|
exit_pass
|