This is a note to let you know that I've just added the patch titled
perf tests task_analyzer: Skip tests if no libtraceevent support
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-tests-task_analyzer-skip-tests-if-no-libtraceev.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bfc0d55f714d91f78349b120dd77f113a15487fe
Author: Aditya Gupta <adityag@xxxxxxxxxxxxx>
Date: Tue Jun 13 22:11:45 2023 +0530
perf tests task_analyzer: Skip tests if no libtraceevent support
[ Upstream commit c3ac3b0779770acd3ad7eecb5099ab4419ef2e2e ]
Test "perf script task-analyzer tests" fails in environment with missing
libtraceevent support, as perf record fails to create the perf.data
file, which further tests depend on.
Instead, when perf is not compiled with libtraceevent support, skip
those tests instead of failing them, by checking the output of `perf
record --dry-run` to see if it prints the error "libtraceevent is
necessary for tracepoint support"
For the following output, perf compiled with: `make NO_LIBTRACEEVENT=1`
Before the patch:
108: perf script task-analyzer tests :
test child forked, pid 24105
failed to open perf.data: No such file or directory (try 'perf record' first)
FAIL: "invokation of perf script report task-analyzer command failed" Error message: ""
FAIL: "test_basic" Error message: "Failed to find required string:'Comm'."
failed to open perf.data: No such file or directory (try 'perf record' first)
FAIL: "invokation of perf script report task-analyzer --ns --rename-comms-by-tids 0:random command failed" Error message: ""
FAIL: "test_ns_rename" Error message: "Failed to find required string:'Comm'."
failed to open perf.data: No such file or directory (try 'perf record' first)
<...>
perf script task-analyzer tests: FAILED!
With this patch, the script instead returns 2 signifying SKIP, and after
the patch:
108: perf script task-analyzer tests :
test child forked, pid 26010
libtraceevent is necessary for tracepoint support
WARN: Skipping tests. No libtraceevent support
test child finished with -2
perf script task-analyzer tests: Skip
Fixes: e8478b84d6ba9ccf ("perf test: Add new task-analyzer tests")
Signed-off-by: Aditya Gupta <adityag@xxxxxxxxxxxxx>
Cc: Disha Goel <disgoel@xxxxxxxxxxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: John Garry <john.g.garry@xxxxxxxxxx>
Cc: Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Petar Gligoric <petar.gligoric@xxxxxxxxxxxxxxxxx>
Cc: Ravi Bangoria <ravi.bangoria@xxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20230613164145.50488-18-atrajeev@xxxxxxxxxxxxxxxxxx
Signed-off-by: Athira Rajeev <atrajeev@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Kajol Jain <kjain@xxxxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/tests/shell/test_task_analyzer.sh b/tools/perf/tests/shell/test_task_analyzer.sh
index 6b3343234a6b2..1b7f3c1ec218b 100755
--- a/tools/perf/tests/shell/test_task_analyzer.sh
+++ b/tools/perf/tests/shell/test_task_analyzer.sh
@@ -44,9 +44,20 @@ find_str_or_fail() {
fi
}
+# check if perf is compiled with libtraceevent support
+skip_no_probe_record_support() {
+ perf record -e "sched:sched_switch" -a -- sleep 1 2>&1 | grep "libtraceevent is necessary for tracepoint support" && return 2
+ return 0
+}
+
prepare_perf_data() {
# 1s should be sufficient to catch at least some switches
perf record -e sched:sched_switch -a -- sleep 1 > /dev/null 2>&1
+ # check if perf data file got created in above step.
+ if [ ! -e "perf.data" ]; then
+ printf "FAIL: perf record failed to create \"perf.data\" \n"
+ return 1
+ fi
}
# check standard inkvokation with no arguments
@@ -134,6 +145,13 @@ test_csvsummary_extended() {
find_str_or_fail "Out-Out;" csvsummary ${FUNCNAME[0]}
}
+skip_no_probe_record_support
+err=$?
+if [ $err -ne 0 ]; then
+ echo "WARN: Skipping tests. No libtraceevent support"
+ cleanup
+ exit $err
+fi
prepare_perf_data
test_basic
test_ns_rename
