This is a note to let you know that I've just added the patch titled
perf test: Record only user callchains on the "Check Arm64 callgraphs are complete in fp mode" test
to the 5.18-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-test-record-only-user-callchains-on-the-check-a.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b6ceb5316137472ea18b45de1ed4f97f032a54ce
Author: Michael Petlan <mpetlan@xxxxxxxxxx>
Date: Tue Jun 14 12:52:07 2022 +0200
perf test: Record only user callchains on the "Check Arm64 callgraphs are complete in fp mode" test
[ Upstream commit 72dcae8efd42699bbfd55e1ef187310c4e2e5dcb ]
The testcase 'Check Arm64 callgraphs are complete in fp mode' wants to
see the following output:
610 leaf
62f parent
648 main
However, without excluding kernel callchains, the output might look like:
ffffc2ff40ef1b5c arch_local_irq_enable
ffffc2ff419d032c __schedule
ffffc2ff419d06c0 schedule
ffffc2ff40e4da30 do_notify_resume
ffffc2ff40e421b0 work_pending
610 leaf
62f parent
648 main
Adding '--user-callchains' leaves only the wanted symbols in the chain.
Fixes: cd6382d82752737e ("perf test arm64: Test unwinding using fame-pointer (fp) mode")
Suggested-by: German Gomez <german.gomez@xxxxxxx>
Reviewed-by: German Gomez <german.gomez@xxxxxxx>
Reviewed-by: Leo Yan <leo.yan@xxxxxxxxxx>
Signed-off-by: Michael Petlan <mpetlan@xxxxxxxxxx>
Cc: German Gomez <german.gomez@xxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220614105207.26223-1-mpetlan@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/tests/shell/test_arm_callgraph_fp.sh b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
index 6ffbb27afaba..ec108d45d3c6 100755
--- a/tools/perf/tests/shell/test_arm_callgraph_fp.sh
+++ b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
@@ -43,7 +43,7 @@ CFLAGS="-g -O0 -fno-inline -fno-omit-frame-pointer"
cc $CFLAGS $TEST_PROGRAM_SOURCE -o $TEST_PROGRAM || exit 1
# Add a 1 second delay to skip samples that are not in the leaf() function
-perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 -- $TEST_PROGRAM 2> /dev/null &
+perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
PID=$!
echo " + Recording (PID=$PID)..."
