kernel/linux.git/tools/perf/tests/parse-events.c, branch v6.18.22

perf record: Add auto counter reload parse and regression tests

2025-10-03T19:49:51+00:00

Include event parsing and regression tests for auto counter reload and ratio-to-prev event term. Reviewed-by: Ian Rogers Signed-off-by: Thomas Falcon Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Dapeng Mi Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf parse-events: Fix missing slots for Intel topdown metric events

2025-07-24T20:41:35+00:00

Topdown metric events require grouping with a slots event. In perf metrics this is currently achieved by metrics adding an unnecessary "0 * tma_info_thread_slots". New TMA metrics trigger optimizations of the metric expression that removes the event and breaks the metric due to the missing but required event. Add a pass immediately before sorting and fixing parsed events, that insert a slots event if one is missing. Update test expectations to match this. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250719030517.1990983-15-irogers@google.com Signed-off-by: Namhyung Kim

perf tests: Enable tests disabled due to tracepoint parsing

2024-12-09T20:52:42+00:00

Tracepoint parsing required libtraceevent but no longer does. Remove the Build logic and #ifdefs that caused the tests not to be run. Test code that directly uses libtraceevent is still guarded. Reviewed-by: Namhyung Kim Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Athira Rajeev Cc: Ben Gainey Cc: Colin Ian King Cc: Dominique Martinet Cc: Ilkka Koskinen Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Oliver Upton Cc: Paran Lee Cc: Peter Zijlstra Cc: Steinar H. Gunderson Cc: Steven Rostedt (VMware) Cc: Thomas Falcon Cc: Weilin Wang Cc: Yang Jihong Cc: Yang Li Cc: Ze Gao Cc: Zixian Cai Cc: zhaimingbing Link: https://lore.kernel.org/r/20241118225345.889810-8-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Do not set exclude_guest for precise_ip

2024-10-22T16:52:11+00:00

It seems perf sets the exclude_guest bit because of Intel PEBS implementation which uses a virtual address. IIUC now kernel disables PEBS when it goes to the guest mode regardless of this bit so we don't need to set it explicitly. At least for the other archs/vendors. I found the commit 1342798cc13e set the exclude_guest for precise_ip in the tool and the commit 20b279ddb38c added kernel side enforcement which was reverted by commit a706d965dcfd later. Actually it doesn't set the exclude_guest for the default event (cycles:P) already. $ grep -m1 vendor /proc/cpuinfo vendor_id : GenuineIntel $ perf record -e cycles:P true [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.002 MB perf.data (9 samples) ] $ perf evlist -v | tr ',' '\n' | grep -e exclude -e precise precise_ip: 3 But having lower 'p' modifier set the bit for some reason. $ perf record -e cycles:pp true [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.002 MB perf.data (9 samples) ] $ perf evlist -v | tr ',' '\n' | grep -e exclude -e precise precise_ip: 2 exclude_guest: 1 Actually AMD IBS suffers from this because it doesn't support excludes and having this bit effectively disables new features in the current implementation (due to the missing feature check). $ grep -m1 vendor /proc/cpuinfo vendor_id : AuthenticAMD $ perf record -W -e cycles:p -vv true 2>&1 | grep switching switching off PERF_FORMAT_LOST support switching off weight struct support switching off bpf_event switching off ksymbol switching off cloexec flag switching off mmap2 switching off exclude_guest, exclude_host By not setting exclude_guest, we can fix this inconsistency and the troubles. Reviewed-by: Ian Rogers Reviewed-by: James Clark Reviewed-by: Ravi Bangoria Acked-by: Kan Liang Cc: James Clark Cc: Atish Patra Cc: Mingwei Zhang Cc: Kajol Jain Cc: Thomas Richter Cc: Palmer Dabbelt Link: https://lore.kernel.org/r/20241016062359.264929-5-namhyung@kernel.org Signed-off-by: Namhyung Kim

perf tools: Don't set attr.exclude_guest by default

2024-10-22T16:52:11+00:00

The exclude_guest in the event attribute is to limit profiling in the host environment. But I'm not sure why we want to set it by default cause we don't care about it in most cases and I feel like it just makes new PMU implementation complicated. Of course it's useful for perf kvm command so I added the exclude_GH_default variable to preserve the old behavior for perf kvm and other commands like perf record and stat won't set the exclude bit. This is helpful for AMD IBS case since having exclude_guest bit will clear new feature bit due to the missing feature check logic. $ sysctl kernel.perf_event_paranoid kernel.perf_event_paranoid = 0 $ perf record -W -e ibs_op// -vv true 2>&1 | grep switching switching off PERF_FORMAT_LOST support switching off weight struct support switching off bpf_event switching off ksymbol switching off cloexec flag switching off mmap2 switching off exclude_guest, exclude_host Intestingly, I found it sets the exclude_bit if "u" modifier is used. I don't know why but it's neither intuitive nor consistent. Let's remove the bit there too. Reviewed-by: Ian Rogers Reviewed-by: James Clark Reviewed-by: Ravi Bangoria Acked-by: Kan Liang Cc: James Clark Cc: Atish Patra Cc: Mingwei Zhang Cc: Kajol Jain Cc: Thomas Richter Cc: Palmer Dabbelt Link: https://lore.kernel.org/r/20241016062359.264929-3-namhyung@kernel.org Signed-off-by: Namhyung Kim

perf evsel: Remove pmu_name

2024-09-26T20:26:11+00:00

"evsel->pmu_name" is only ever assigned a strdup of "pmu->name", a strdup of "evsel->pmu_name" or NULL. As such, prefer to use "pmu->name" directly and even to directly compare PMUs than PMU names. For safety, add some additional NULL tests. Acked-by: Namhyung Kim Signed-off-by: Ian Rogers [ Fix arm-spe.c usage of pmu_name and empty PMU name ] Acked-by: Kan Liang Signed-off-by: James Clark Cc: Yang Jihong Cc: Dominique Martinet Cc: Howard Chu Cc: Ze Gao Cc: Yicong Yang Cc: Weilin Wang Cc: Will Deacon Cc: Mike Leach Cc: Jing Zhang Cc: Yang Li Cc: Leo Yan Cc: ak@linux.intel.com Cc: Athira Rajeev Cc: linux-arm-kernel@lists.infradead.org Cc: Sun Haiyong Cc: John Garry Link: https://lore.kernel.org/r/20240926144851.245903-6-james.clark@linaro.org Signed-off-by: Namhyung Kim

perf pmus: Fake PMU clean up

2024-09-11T14:27:42+00:00

Rather than passing a fake PMU around, just pass that the fake PMU should be used - true when doing testing. Move the fake PMU into pmus.[ch] and try to abstract the PMU's properties in pmu.c, ie so there is less "if fake_pmu" in non-PMU code. Give the fake PMU a made up type number. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Athira Rajeev Cc: Benjamin Gray Cc: Changbin Du Cc: Clément Le Goffic Cc: Colin Ian King Cc: Dominique Martinet Cc: Dr. David Alan Gilbert Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Junhao He Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Oliver Upton Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Sun Haiyong Cc: Tiezhu Yang Cc: Veronika Molnarova Cc: Weilin Wang Cc: Will Deacon Cc: Xu Yang Cc: Yang Jihong Cc: Yicong Yang Cc: Ze Gao Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20240907050830.6752-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf parse-events: Remove duplicated include in parse-events.c

2024-09-11T12:35:27+00:00

The header files parse-events.h is included twice in parse-events.c, so one inclusion of each can be removed. Reported-by: Abaci Robot Signed-off-by: Yang Li Reviewed-by: James Clark Cc: Ingo Molnar Cc: Namhyung Kim Cc: Peter Zijlstra Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=10822 Link: https://lore.kernel.org/r/20240910005522.35994-1-yang.lee@linux.alibaba.com Signed-off-by: Arnaldo Carvalho de Melo

perf parse-events: Add default_breakpoint_len helper

2024-09-04T12:49:09+00:00

The default breakpoint length is "sizeof(long)" however this is incorrect on platforms like Aarch64 where sizeof(long) is 8 but the breakpoint length is 4. Add a helper function that can be used to determine the correct breakpoint length, in this change it just returns the existing default sizeof(long) value. Use the helper in the bp_account test so that, when modifying the event from a watchpoint to a breakpoint, the breakpoint length is appropriate for the architecture and not just sizeof(long). Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Chaitanya S Prakash Cc: Colin Ian King Cc: Dominique Martinet Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Junhao He Cc: Kan Liang Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Yang Jihong Link: https://lore.kernel.org/r/20240904050606.752788-5-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf parse: Allow tracepoint names to start with digits

2024-05-10T13:50:34+00:00

Tracepoints can start with digits, although we don't have many of these: $ rg -g '*.h' '\bTRACE_EVENT\([0-9]' net/mac802154/trace.h 53:TRACE_EVENT(802154_drv_return_int, ... net/ieee802154/trace.h 66:TRACE_EVENT(802154_rdev_add_virtual_intf, ... include/trace/events/9p.h 124:TRACE_EVENT(9p_client_req, ... Just allow names to start with digits too so e.g. "perf trace -e '9p:*'" works Reviewed-by: Ian Rogers Signed-off-by: Dominique Martinet Tested-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20240510-perf_digit-v4-3-db1553f3233b@codewreck.org Signed-off-by: Arnaldo Carvalho de Melo