6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Weilin Wang <weilin.wang@xxxxxxxxx> [ Upstream commit b2738fda24543777a623a7d1cc2a9985ab81b448 ] Intel TPEBS sampling mode is supported through perf record. The counting mode code uses perf record to capture retire_latency value and use it in metric calculation. This test checks the counting mode code on Intel platforms. Committer testing: root@x1:~# perf test tpebs 123: test Intel TPEBS counting mode : Ok root@x1:~# set -o vi root@x1:~# perf test tpebs 123: test Intel TPEBS counting mode : Ok root@x1:~# perf test -v tpebs 123: test Intel TPEBS counting mode : Ok root@x1:~# perf test -vvv tpebs 123: test Intel TPEBS counting mode: --- start --- test child forked, pid 16603 Testing without --record-tpebs Testing with --record-tpebs ---- end(0) ---- 123: test Intel TPEBS counting mode : Ok root@x1:~# Reviewed-by: Namhyung Kim <namhyung@xxxxxxxxxx> Signed-off-by: Weilin Wang <weilin.wang@xxxxxxxxx> Acked-by: Ian Rogers <irogers@xxxxxxxxxx> Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> Cc: Caleb Biggers <caleb.biggers@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx> Cc: Perry Taylor <perry.taylor@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Samantha Alt <samantha.alt@xxxxxxxxx> Link: https://lore.kernel.org/r/20240720062102.444578-9-weilin.wang@xxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Stable-dep-of: 057f8bfc6f70 ("perf stat: Uniquify event name improvements") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- .../perf/tests/shell/test_stat_intel_tpebs.sh | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100755 tools/perf/tests/shell/test_stat_intel_tpebs.sh diff --git a/tools/perf/tests/shell/test_stat_intel_tpebs.sh b/tools/perf/tests/shell/test_stat_intel_tpebs.sh new file mode 100755 index 0000000000000..c60b29add9801 --- /dev/null +++ b/tools/perf/tests/shell/test_stat_intel_tpebs.sh @@ -0,0 +1,19 @@ +#!/bin/bash +# test Intel TPEBS counting mode +# SPDX-License-Identifier: GPL-2.0 + +set -e +grep -q GenuineIntel /proc/cpuinfo || { echo Skipping non-Intel; exit 2; } + +# Use this event for testing because it should exist in all platforms +event=cache-misses:R + +# Without this cmd option, default value or zero is returned +echo "Testing without --record-tpebs" +result=$(perf stat -e "$event" true 2>&1) +[[ "$result" =~ $event ]] || exit 1 + +# In platforms that do not support TPEBS, it should execute without error. +echo "Testing with --record-tpebs" +result=$(perf stat -e "$event" --record-tpebs -a sleep 0.01 2>&1) +[[ "$result" =~ "perf record" && "$result" =~ $event ]] || exit 1 -- 2.43.0
