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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@kernel.org> Signed-off-by: Weilin Wang <weilin.wang@intel.com> Acked-by: Ian Rogers <irogers@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Caleb Biggers <caleb.biggers@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Perry Taylor <perry.taylor@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Samantha Alt <samantha.alt@intel.com> Link: https://lore.kernel.org/r/20240720062102.444578-9-weilin.wang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
20 lines
676 B
Bash
Executable File
20 lines
676 B
Bash
Executable File
#!/bin/bash
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# test Intel TPEBS counting mode
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# SPDX-License-Identifier: GPL-2.0
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set -e
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grep -q GenuineIntel /proc/cpuinfo || { echo Skipping non-Intel; exit 2; }
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# Use this event for testing because it should exist in all platforms
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event=cache-misses:R
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# Without this cmd option, default value or zero is returned
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echo "Testing without --record-tpebs"
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result=$(perf stat -e "$event" true 2>&1)
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[[ "$result" =~ $event ]] || exit 1
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# In platforms that do not support TPEBS, it should execute without error.
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echo "Testing with --record-tpebs"
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result=$(perf stat -e "$event" --record-tpebs -a sleep 0.01 2>&1)
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[[ "$result" =~ "perf record" && "$result" =~ $event ]] || exit 1
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