linux

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perf test: Add a perf event fallback test This adds test cases to verify the precise ip fallback logic: - If the system supports precise ip, for an event given with the maximum precision level, it should be able to decrease precise_ip to find a supported level. - The same fallback behavior should also work in more complex scenarios, such as event groups or when PEBS is involved Additional fallback tests, such as those covering missing feature cases, can be added in the future. Suggested-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Reviewed-by: Ian Rogers <irogers!@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> 2025-11-12 08:48:23 -08:00









perf test: Fix hybrid testing of event fallback test The mem-loads-aux event exists on hybrid systems but the "cpu" PMU does not. This causes an event parsing error which erroneously makes the test look like it is failing. Avoid naming the PMU to avoid this. Rather than cleaning up perf.data in the directory the test is run, explicitly send the 'perf record' output to /dev/null and avoid any cleanup scripts. Fixes: fc9c17b22352 ("perf test: Add a perf event fallback test") Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> 2025-12-01 15:11:36 -08:00
perf test: Add a perf event fallback test This adds test cases to verify the precise ip fallback logic: - If the system supports precise ip, for an event given with the maximum precision level, it should be able to decrease precise_ip to find a supported level. - The same fallback behavior should also work in more complex scenarios, such as event groups or when PEBS is involved Additional fallback tests, such as those covering missing feature cases, can be added in the future. Suggested-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Reviewed-by: Ian Rogers <irogers!@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> 2025-11-12 08:48:23 -08:00
























perf test: Fix hybrid testing of event fallback test The mem-loads-aux event exists on hybrid systems but the "cpu" PMU does not. This causes an event parsing error which erroneously makes the test look like it is failing. Avoid naming the PMU to avoid this. Rather than cleaning up perf.data in the directory the test is run, explicitly send the 'perf record' output to /dev/null and avoid any cleanup scripts. Fixes: fc9c17b22352 ("perf test: Add a perf event fallback test") Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> 2025-12-01 15:11:36 -08:00
perf test: Add a perf event fallback test This adds test cases to verify the precise ip fallback logic: - If the system supports precise ip, for an event given with the maximum precision level, it should be able to decrease precise_ip to find a supported level. - The same fallback behavior should also work in more complex scenarios, such as event groups or when PEBS is involved Additional fallback tests, such as those covering missing feature cases, can be added in the future. Suggested-by: Ian Rogers <irogers@google.com> Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com> Signed-off-by: Zide Chen <zide.chen@intel.com> Reviewed-by: Ian Rogers <irogers!@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> 2025-11-12 08:48:23 -08:00

71 lines 1.1 KiB Raw Normal View History

71 lines

1.1 KiB

Raw Normal View History