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perf tests arm_spe: Add test for discard mode

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Add a test that checks that there were no AUX or AUXTRACE events
recorded when discard mode is used.

Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Graham Woodward <graham.woodward@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Veronika Molnarova <vmolnaro@redhat.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20250108142904.401139-6-james.clark@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2025-01-08 14:29:00 +00:00 committed by Arnaldo Carvalho de Melo
parent 9c3164ea7e
commit 05cd60e4d0
1 changed files with 30 additions and 0 deletions
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30
tools/perf/tests/shell/test_arm_spe.sh
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@ -107,7 +107,37 @@ arm_spe_system_wide_test() {
arm_spe_report "SPE system-wide testing" $err
}
arm_spe_discard_test() {
echo "SPE discard mode"
for f in /sys/bus/event_source/devices/arm_spe_*; do
if [ -e "$f/format/discard" ]; then
cpu=$(cut -c -1 "$f/cpumask")
break
fi
done
if [ -z $cpu ]; then
arm_spe_report "SPE discard mode not present" 2
return
fi
# Test can use wildcard SPE instance and Perf will only open the event
# on instances that have that format flag. But make sure the target
# runs on an instance with discard mode otherwise we're not testing
# anything.
perf record -o ${perfdata} -e arm_spe/discard/ -N -B --no-bpf-event \
-- taskset --cpu-list $cpu true
if perf report -i ${perfdata} --stats | grep 'AUX events\|AUXTRACE events'; then
arm_spe_report "SPE discard mode found unexpected data" 1
else
arm_spe_report "SPE discard mode" 0
fi
}
arm_spe_snapshot_test
arm_spe_system_wide_test
arm_spe_discard_test
exit $glb_err