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author | Kan Liang <kan.liang@linux.intel.com> | 2023-11-07 10:40:20 -0800 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-11-27 10:21:27 -0300 |
commit | 697579629f850d8f863147351e12e74c50114a8a (patch) | |
tree | 1906c75c94e1f448958eba8b8fb0cf29f5790706 | |
parent | cd38d6b5fa2dfc3beb7311f0b373e3141620c76b (diff) | |
download | linux-stable-697579629f850d8f863147351e12e74c50114a8a.tar.gz linux-stable-697579629f850d8f863147351e12e74c50114a8a.tar.bz2 linux-stable-697579629f850d8f863147351e12e74c50114a8a.zip |
perf test: Basic branch counter support
Add a basic test for the branch counter feature.
The test verifies that
- The new filter can be successfully applied on the supported platforms.
- The counter value can be outputted via the perf report -D
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tinghao Zhang <tinghao.zhang@intel.com>
Link: https://lore.kernel.org/r/20231107184020.1497571-1-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rwxr-xr-x | tools/perf/tests/shell/record.sh | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh index 29443b8e8876..c74412c68e65 100755 --- a/tools/perf/tests/shell/record.sh +++ b/tools/perf/tests/shell/record.sh @@ -12,6 +12,9 @@ err=0 perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) testprog="perf test -w thloop" testsym="test_loop" +cpu_pmu_dir="/sys/bus/event_source/devices/cpu*" +br_cntr_file="/caps/branch_counter_nr" +br_cntr_output="branch stack counters" cleanup() { rm -rf "${perfdata}" @@ -155,10 +158,37 @@ test_workload() { echo "Basic target workload test [Success]" } +test_branch_counter() { + echo "Basic branch counter test" + # Check if the branch counter feature is supported + for dir in $cpu_pmu_dir + do + if [ ! -e "$dir$br_cntr_file" ] + then + echo "branch counter feature not supported on all core PMUs ($dir) [Skipped]" + return + fi + done + if ! perf record -o "${perfdata}" -j any,counter ${testprog} 2> /dev/null + then + echo "Basic branch counter test [Failed record]" + err=1 + return + fi + if ! perf report -i "${perfdata}" -D -q | grep -q "$br_cntr_output" + then + echo "Basic branch record test [Failed missing output]" + err=1 + return + fi + echo "Basic branch counter test [Success]" +} + test_per_thread test_register_capture test_system_wide test_workload +test_branch_counter cleanup exit $err |