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2025-07-01perf test: Name the noploop processIan Rogers
Name the noploop process "perf-noploop" so that tests can easily check for its existence. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250628012302.1242532-1-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-30perf build: Specify shellcheck should use bashCollin Funk
When someone has a global shellcheckrc file, for example at ~/.config/shellcheckrc, with the directive 'shell=sh', building perf will fail with many shellcheck errors like: In tests/shell/base_probe/test_adding_kernel.sh line 294: (( TEST_RESULT += $? )) ^---------------------^ SC3006 (warning): In POSIX sh, standalone ((..)) is undefined. For more information: https://www.shellcheck.net/wiki/SC3006 -- In POSIX sh, standalone ((..)) is... make[5]: *** [tests/Build:91: tests/shell/base_probe/test_adding_kernel.sh.shellcheck_log] Error 1 Passing the '-s bash' option ensures that it runs correctly regardless of a developers global configuration. This patch adds '-s bash' and other options to the SHELLCHECK variable in Makefile.perf and makes use of the variable consistently. Signed-off-by: Collin Funk <collin.funk1@gmail.com> Link: https://lore.kernel.org/r/63491dbc8439edf2e949d80e264b9d22332fea61.1751082075.git.collin.funk1@gmail.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-30perf test annotate: Use --percent-limit rather than head to reduce outputIan Rogers
The annotate test was sped up by Thomas Richter <tmricht@linux.ibm.com> in commit 658a8805cb60 ("perf test: Speed up test case 70 annotate basic tests") by reducing the annotate output using head. This causes flakes on hybrid machines where the first event dumped may not have the samples for the test within it. Rather than reduce the output using `head` switch to `--percent-limit 10` which will stop annotate dumping functions that have an overhead of less than 10%, the noploop program should be using more. Add the missing objdump option for the pipe mode version of the objdump with a command test. Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Link: https://lore.kernel.org/r/20250628015832.1271229-1-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-30perf test: Add basic callgraph test to record testingIan Rogers
Give some basic perf record callgraph coverage. Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: James Clark <james.clark@linaro.org> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Link: https://lore.kernel.org/r/20250628015553.1270748-1-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-30perf test: perf header test fails on s390Thomas Richter
commit 2d584688643fa ("perf test: Add header shell test") introduced a new test case for perf header. It fails on s390 because call graph option -g is not supported on s390. Also the option --call-graph dwarf is only supported for the event cpu-clock. Remove this option and the test succeeds. Output after: # ./perf test 76 76: perf header tests : Ok Fixes: 2d584688643fa ("perf test: Add header shell test") Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Ian Rogers <irogers@google.com> Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Link: https://lore.kernel.org/r/20250630091613.3061664-1-tmricht@linux.ibm.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-27perf stat: Fix uncore aggregation numberChun-Tse Shao
Follow up: lore.kernel.org/CAP-5=fVDF4-qYL1Lm7efgiHk7X=_nw_nEFMBZFMcsnOOJgX4Kg@mail.gmail.com/ The patch adds unit aggregation during evsel merge the aggregated uncore counters. Change the name of the column to `ctrs` and `counters` for json mode. Tested on a 2-socket machine with SNC3, uncore_imc_[0-11] and cpumask="0,120" Before: perf stat -e clockticks -I 1000 --per-socket # time socket cpus counts unit events 1.001085024 S0 1 9615386315 clockticks 1.001085024 S1 1 9614287448 clockticks perf stat -e clockticks -I 1000 --per-node # time node cpus counts unit events 1.001029867 N0 1 3205726984 clockticks 1.001029867 N1 1 3205444421 clockticks 1.001029867 N2 1 3205234018 clockticks 1.001029867 N3 1 3205224660 clockticks 1.001029867 N4 1 3205207213 clockticks 1.001029867 N5 1 3205528246 clockticks After: perf stat -e clockticks -I 1000 --per-socket # time socket ctrs counts unit events 1.001026071 S0 12 9619677996 clockticks 1.001026071 S1 12 9618612614 clockticks perf stat -e clockticks -I 1000 --per-node # time node ctrs counts unit events 1.001027449 N0 4 3207251859 clockticks 1.001027449 N1 4 3207315930 clockticks 1.001027449 N2 4 3206981828 clockticks 1.001027449 N3 4 3206566126 clockticks 1.001027449 N4 4 3206032609 clockticks 1.001027449 N5 4 3205651355 clockticks Tested with JSON output linter: perf test "perf stat JSON output linter" 94: perf stat JSON output linter : Ok Suggested-by: Ian Rogers <irogers@google.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Chun-Tse Shao <ctshao@google.com> Link: https://lore.kernel.org/r/20250627201818.479421-1-ctshao@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-26tools: Remove libcrypto dependencyYuzhuo Jing
Remove all occurrence of libcrypto in the build system. Signed-off-by: Yuzhuo Jing <yuzhuo@google.com> Signed-off-by: Eric Biggers <ebiggers@kernel.org> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250625202311.23244-5-ebiggers@kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-26perf util: add a basic SHA-1 implementationEric Biggers
SHA-1 can be written in fewer than 100 lines of code. Just add a basic SHA-1 implementation so that there's no need to use an external library or try to pull in the kernel's SHA-1 implementation. The kernel's SHA-1 implementation is not really intended to be pulled into userspace programs in the way that it was proposed to do so for perf (https://lore.kernel.org/r/20250521225307.743726-3-yuzhuo@google.com/), and it's also likely to undergo some refactoring in the future. There's no need to tie userspace tools to it. Include a test for sha1() in the util test suite. Signed-off-by: Eric Biggers <ebiggers@kernel.org> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250625202311.23244-3-ebiggers@kernel.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-26perf test: Change all remaining #!/bin/sh to #!/bin/bashJames Clark
There are 43 instances of posix shell tests and 35 instances of bash. To give us a single consistent language for testing in, replace all #!/bin/sh to #!/bin/bash. Common sources that are included in both different shells will now work as expected. And we no longer have to fix up bashisms that appear to work when someone's system has sh symlinked to bash, but don't work on other systems that have both shells installed. Although we could have chosen sh, it's not backwards compatible so it wouldn't be possible to bulk convert without re-writing the existing bash tests. Choosing bash also gives us some nicer features including 'local' variable definitions and regexes in if statements that are already widely used in the tests. It's not expected that there are any users with only sh available due to the large number of bash tests that exist. Discussed in relation to running shellcheck here: https://lore.kernel.org/linux-perf-users/e3751a74be34bbf3781c4644f518702a7270220b.1749785642.git.collin.funk1@gmail.com/ Signed-off-by: James Clark <james.clark@linaro.org> Reviewed-by: Collin Funk <collin.funk1@gmail.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Link: https://lore.kernel.org/r/20250623-james-perf-bash-tests-v1-1-f572f54d4559@linaro.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-25perf tests: Add a DRM PMU testIan Rogers
The test opens any DRM devices so that the shell has fdinfo files containing the DRM data. The test then uses perf stat to make sure the events can be read. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250624231837.179536-4-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-25perf debug: Add function symbols to dump_stackIan Rogers
Symbolize stack traces by creating a live machine. Add this functionality to dump_stack and switch dump_stack users to use it. Switch TUI to use it. Add stack traces to the child test function which can be useful to diagnose blocked code. Example output: ``` $ perf test -vv PERF_RECORD_ ... 7: PERF_RECORD_* events & perf_sample fields: 7: PERF_RECORD_* events & perf_sample fields : Running (1 active) ^C Signal (2) while running tests. Terminating tests with the same signal Internal test harness failure. Completing any started tests: : 7: PERF_RECORD_* events & perf_sample fields: ---- unexpected signal (2) ---- #0 0x55788c6210a3 in child_test_sig_handler builtin-test.c:0 #1 0x7fc12fe49df0 in __restore_rt libc_sigaction.c:0 #2 0x7fc12fe99687 in __internal_syscall_cancel cancellation.c:64 #3 0x7fc12fee5f7a in clock_nanosleep@GLIBC_2.2.5 clock_nanosleep.c:72 #4 0x7fc12fef1393 in __nanosleep nanosleep.c:26 #5 0x7fc12ff02d68 in __sleep sleep.c:55 #6 0x55788c63196b in test__PERF_RECORD perf-record.c:0 #7 0x55788c620fb0 in run_test_child builtin-test.c:0 #8 0x55788c5bd18d in start_command run-command.c:127 #9 0x55788c621ef3 in __cmd_test builtin-test.c:0 #10 0x55788c6225bf in cmd_test ??:0 #11 0x55788c5afbd0 in run_builtin perf.c:0 #12 0x55788c5afeeb in handle_internal_command perf.c:0 #13 0x55788c52b383 in main ??:0 #14 0x7fc12fe33ca8 in __libc_start_call_main libc_start_call_main.h:74 #15 0x7fc12fe33d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128 #16 0x55788c52b9d1 in _start ??:0 ---- unexpected signal (2) ---- #0 0x55788c6210a3 in child_test_sig_handler builtin-test.c:0 #1 0x7fc12fe49df0 in __restore_rt libc_sigaction.c:0 #2 0x7fc12fea3a14 in pthread_sigmask@GLIBC_2.2.5 pthread_sigmask.c:45 #3 0x7fc12fe49fd9 in __GI___sigprocmask sigprocmask.c:26 #4 0x7fc12ff2601b in __longjmp_chk longjmp.c:36 #5 0x55788c6210c0 in print_test_result.isra.0 builtin-test.c:0 #6 0x7fc12fe49df0 in __restore_rt libc_sigaction.c:0 #7 0x7fc12fe99687 in __internal_syscall_cancel cancellation.c:64 #8 0x7fc12fee5f7a in clock_nanosleep@GLIBC_2.2.5 clock_nanosleep.c:72 #9 0x7fc12fef1393 in __nanosleep nanosleep.c:26 #10 0x7fc12ff02d68 in __sleep sleep.c:55 #11 0x55788c63196b in test__PERF_RECORD perf-record.c:0 #12 0x55788c620fb0 in run_test_child builtin-test.c:0 #13 0x55788c5bd18d in start_command run-command.c:127 #14 0x55788c621ef3 in __cmd_test builtin-test.c:0 #15 0x55788c6225bf in cmd_test ??:0 #16 0x55788c5afbd0 in run_builtin perf.c:0 #17 0x55788c5afeeb in handle_internal_command perf.c:0 #18 0x55788c52b383 in main ??:0 #19 0x7fc12fe33ca8 in __libc_start_call_main libc_start_call_main.h:74 #20 0x7fc12fe33d65 in __libc_start_main@@GLIBC_2.34 libc-start.c:128 #21 0x55788c52b9d1 in _start ??:0 7: PERF_RECORD_* events & perf_sample fields : Skip (permissions) ``` Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250624210500.2121303-1-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-24perf test: Replace grep perl regexp with awkChun-Tse Shao
perl is not universal on all machines and should be replaced with awk, which is much more common. Before: $ perf test "probe libc's inet_pton & backtrace it with ping" -v --- start --- test child forked, pid 145431 grep: Perl matching not supported in a --disable-perl-regexp build FAIL: could not add event ---- end(-1) ---- 121: probe libc's inet_pton & backtrace it with ping : FAILED! After: $ perf test "probe libc's inet_pton & backtrace it with ping" -v 121: probe libc's inet_pton & backtrace it with ping : Ok Suggested-by: Ian Rogers <irogers@google.com> Signed-off-by: Chun-Tse Shao <ctshao@google.com> Reviewed-by: James Clark <james.clark@linaro.org> Link: https://lore.kernel.org/r/20250620174034.819894-1-ctshao@google.com [ fold James' suggestion not to escape _ in the event pattern. ] Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-22Merge tag 'v6.16-rc3' into perf-tools-nextNamhyung Kim
To get the fixes in libbpf and perf tools. Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20perf test: add test for BPF metadata collectionBlake Jones
This is an end-to-end test for the PERF_RECORD_BPF_METADATA support. It adds a new "bpf_metadata_perf_version" variable to perf's BPF programs, so that when they are loaded, there will be at least one BPF program with some metadata to parse. The test invokes "perf record" in a way that loads one of those BPF programs, and then sifts through the output to find its BPF metadata. Signed-off-by: Blake Jones <blakejones@google.com> Link: https://lore.kernel.org/r/20250612194939.162730-6-blakejones@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20perf test: Add header shell testIan Rogers
Add a shell test that sanity checks perf data and pipe mode produce expected header fields. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250619002555.100896-1-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-20perf test: Expand user space event reading (rdpmc) testsIan Rogers
Test that disabling rdpmc support via /sys/bus/event_source/cpu*/rdpmc disables reading in the mmap (libperf read support will fallback to using a system call). Test all hybrid PMUs support rdpmc. Ensure hybrid PMUs use the correct CPU to rdpmc the correct event. Previously the test would open cycles or instructions with no extended type then rdpmc it on whatever CPU. This could fail/skip due to which CPU the test was scheduled upon. Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Link: https://lore.kernel.org/r/20250614004528.1652860-1-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-17perf test: Directory file descriptor leakIan Rogers
Add missed close when iterating over the script directories. Fixes: f3295f5b067d3c26 ("perf tests: Use scandirat for shell script finding") Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Link: https://lore.kernel.org/r/20250614004108.1650988-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-06-16perf test: Restrict uniquifying test to machines with 'uncore_imc'Chun-Tse Shao
The test would fail if target machine does not have 'uncore_imc' devices. Since event uniquifying behavior is similar among different architectures, we are restricting the test to only run on machines with `uncore_imc` devices. Suggested-by: Ian Rogers <irogers@google.com> Signed-off-by: Chun-Tse Shao <ctshao@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: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250521224513.1104129-1-ctshao@google.com [ Skip the test, i.e. return 2, instead of returning 0 as if the test had succeed ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-06-09perf test trace: Change the regex pattern in the struct testHoward Chu
Ian mentioned a reliably occurred failure in the trace_btf_general test where he obtained trace output of: sleep/279619 clock_nanosleep(0, 0, {1,1,}, 0x7ffcd47b6450) = 0 But the regex pattern used for verification is "^sleep/[0-9]+ clock_nanosleep\(0, 0, \{1,\}, ..." This lead to a mismatch. The reason is, different sleep commands use different timespec data to call clock_nanosleep, on my machine, the value of tv_nsec is 0. ~~~ $ sudo /tmp/perf/perf trace -e clock_nanosleep -- sleep 1 0.000 (1000.196 ms): sleep/54261 clock_nanosleep(rqtp: { .tv_sec: 1, .tv_nsec: 0 }, rmtp: 0x7ffe13529550) = 0 ~~~ While Ian had this trace log: ~~~ $ sudo /tmp/perf/perf trace -e clock_nanosleep -- sleep 1 0.000 (1000.208 ms): sleep/1710732 clock_nanosleep(rqtp: { .tv_sec: 1, .tv_nsec: 1 }, rmtp: 0x7ffc091f4090) = 0 ~~~ Because sleep's behavior of setting 'tv_nsec' is not certain, and tv_sec is most definitely 1, this patch relaxes the key regex pattern to '\{1,.*\}' for a better chance of matching. Signed-off-by: Howard Chu <howardchu95@gmail.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250528191148.89118-7-howardchu95@gmail.com Reported-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf test trace: Use --sort-events in BTF general testsHoward Chu
Without the '--sort-events' flag, perf trace doesn't receive and process events based on their arrival time, thus PERF_RECORD_COMM event that assigns the correct comm to a PID, may be delivered and processed after regular samples, causing trace outputs not having a 'comm', e.g. 'mv', instead, having the default PID placeholder, e.g. ':14514'. Hopefully this answers Namhyung's question in [1]. You can simply justify the statement with this diff: [2]. Now, simply run this command multiple times: $ touch /tmp/file1 && sudo /tmp/perf trace -e renameat* -- mv /tmp/file1 /tmp/file2 && rm -f /tmp/file2 And you should see two types of results: $ touch /tmp/file1 && sudo /tmp/perf trace -e renameat* -- mv /tmp/file1 /tmp/file2 && rm -f /tmp/file2 [debug] deliver [debug] machine__process_comm_event [OVERRIDE] old :1221169 new mv str mv [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver 0.000 ( 0.013 ms): mv/1221169 renameat2(olddfd: CWD, oldname: "/tmp/file1", newdfd: CWD, newname: "/tmp/file2", flags: NOREPLACE) = 0 [debug] deliver $ touch /tmp/file1 && sudo /tmp/perf trace -e renameat* -- mv /tmp/file1 /tmp/file2 && rm -f /tmp/file2 [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver [debug] deliver 0.000 ( 0.014 ms): :1221398/1221398 renameat2(olddfd: CWD, oldname: "/tmp/file1", newdfd: CWD, newname: "/tmp/file2", flags: NOREPLACE) = 0 [debug] deliver [debug] deliver [debug] machine__process_comm_event [OVERRIDE] old :1221398 new mv str mv [debug] deliver [debug] deliver [debug] deliver Anyway, use --sort-events in BTF general tests to avoid :PID, a comm is preferred. [1]: https://lore.kernel.org/linux-perf-users/Z_AeswETE5xLcPT8@google.com/ [2]: https://gist.githubusercontent.com/Sberm/6b72b2a1cf1c62244f1f996481769baf/raw/529667bd74a2e7e1953bbd4be545bf875da8a3e7/unsorted.patch Signed-off-by: Howard Chu <howardchu95@gmail.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250528191148.89118-6-howardchu95@gmail.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf test trace: Remove set -e for BTF general testsHoward Chu
Remove set -e and print error messages in BTF general tests. Before: $ sudo /tmp/perf test btf -vv 108: perf trace BTF general tests: 108: perf trace BTF general tests : Running --- start --- test child forked, pid 889299 Checking if vmlinux BTF exists Testing perf trace's string augmentation String augmentation test failed ---- end(-1) ---- 108: perf trace BTF general tests : FAILED! After: $ sudo /tmp/perf test btf -vv 108: perf trace BTF general tests: 108: perf trace BTF general tests : Running --- start --- test child forked, pid 886551 Checking if vmlinux BTF exists Testing perf trace's string augmentation String augmentation test failed, output: :886566/886566 renameat2(CWD, "/tmp/file1_RcMa", CWD, "/tmp/file2_RcMa", NOREPLACE) = 0---- end(-1) ---- 108: perf trace BTF general tests : FAILED! Signed-off-by: Howard Chu <howardchu95@gmail.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250528191148.89118-5-howardchu95@gmail.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf test trace: Stop tracing hrtimer_setup event in trace enum testHoward Chu
The event 'timer:hrtimer_setup' is relatively new, for older kernels, perf trace enum tests won't run as the event 'timer:hrtimer_setup' cannot be found. It was originally called 'timer:hrtimer_init', before being renamed in: commit 244132c4e577 ("tracing/timers: Rename the hrtimer_init event to hrtimer_setup") Using timer:hrtimer_start should be enough for current testing, and hopefully 'start' won't be renamed in the future. Before: $ sudo /tmp/perf test enum -vv 107: perf trace enum augmentation tests: 107: perf trace enum augmentation tests : Running --- start --- test child forked, pid 786187 Checking if vmlinux exists Tracing syscall landlock_add_rule Tracing non-syscall tracepoint timer:hrtimer_setup,timer:hrtimer_start [tracepoint failure] Failed to trace timer:hrtimer_setup,timer:hrtimer_start tracepoint, output: event syntax error: 'timer:hrtimer_setup,timer:hrtimer_start' \___ unknown tracepoint Error: File /sys/kernel/tracing//events/timer/hrtimer_setup not found. Hint: Perhaps this kernel misses some CONFIG_ setting to enable this feature?. Run 'perf list' for a list of valid events Usage: perf trace [<options>] [<command>] or: perf trace [<options>] -- <command> [<options>] or: perf trace record [<options>] [<command>] or: perf trace record [<options>] -- <command> [<options>] -e, --event <event> event/syscall selector. use 'perf list' to list available events ---- end(-1) ---- 107: perf trace enum augmentation tests : FAILED! After: $ sudo /tmp/perf test enum -vv 107: perf trace enum augmentation tests: 107: perf trace enum augmentation tests : Running --- start --- test child forked, pid 808547 Checking if vmlinux exists Tracing syscall landlock_add_rule Tracing non-syscall tracepoint timer:hrtimer_start ---- end(0) ---- 107: perf trace enum augmentation tests : Ok Signed-off-by: Howard Chu <howardchu95@gmail.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250528191148.89118-4-howardchu95@gmail.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf test trace: Remove set -e and print trace test's error messagesHoward Chu
Currently perf test utilizes the set -e option in shell that exit immediately if a command exits with a non-zero status, this prevents further error handling and introduces ambiguity. This patch removes set -e and prints the error message after invoking perf trace during perf tests. In my case, the command that exits with a non-zero status is perf trace instead of grep, because it can't find the 'timer:hrtimer_setup' tracepoint, see below. Before: $ sudo /tmp/perf test enum -vv 107: perf trace enum augmentation tests: 107: perf trace enum augmentation tests : Running --- start --- test child forked, pid 783533 Checking if vmlinux exists Tracing syscall landlock_add_rule Tracing non-syscall tracepoint syscall ---- end(-1) ---- 107: perf trace enum augmentation tests : FAILED! After: $ sudo /tmp/perf test enum -vv 107: perf trace enum augmentation tests: 107: perf trace enum augmentation tests : Running --- start --- test child forked, pid 851658 Checking if vmlinux exists Tracing syscall landlock_add_rule Tracing non-syscall tracepoint timer:hrtimer_setup,timer:hrtimer_start [tracepoint failure] Failed to trace tracepoint timer:hrtimer_setup,timer:hrtimer_start, output: event syntax error: 'timer:hrtimer_setup,timer:hrtimer_start' \___ unknown tracepoint Error: File /sys/kernel/tracing//events/timer/hrtimer_setup not found. Hint: Perhaps this kernel misses some CONFIG_ setting to enable this feature?. Run 'perf list' for a list of valid events Usage: perf trace [<options>] [<command>] or: perf trace [<options>] -- <command> [<options>] or: perf trace record [<options>] [<command>] or: perf trace record [<options>] -- <command> [<options>] -e, --event <event> event/syscall selector. use 'perf list' to list available events---- end(-1) ---- 107: perf trace enum augmentation tests : FAILED! Signed-off-by: Howard Chu <howardchu95@gmail.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250528191148.89118-3-howardchu95@gmail.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf test trace: Use shell's -f flag to check if vmlinux existsHoward Chu
To match the style of the existing codebase, no functional changes were applied. Signed-off-by: Howard Chu <howardchu95@gmail.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250528191148.89118-2-howardchu95@gmail.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf thread_map: Remove uid optionsIan Rogers
Now the target doesn't have a uid, it is handled through BPF filters, remove the uid options to thread_map creation. Tidy up the functions used in tests to avoid passing unused arguments. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250604174545.2853620-11-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf target: Remove uid from targetIan Rogers
Gathering threads with a uid by scanning /proc is inherently racy leading to perf_event_open failures that quit perf. All users of the functionality now use BPF filters, so remove uid and uid_str from target. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250604174545.2853620-10-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-06-09perf tests record: Add basic uid filtering testIan Rogers
Based on the system-wide test with changes around how failure is handled as BPF permissions are a bigger issue than perf event paranoia. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250604174545.2853620-6-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-05-28perf test trace_summary: Skip --bpf-summary tests if no libbpfIan Rogers
If perf is built without libbpf (e.g. NO_LIBBPF=1) then the --bpf-summary perf trace tests will fail. Skip the tests as this is expected behavior. Signed-off-by: Ian Rogers <irogers@google.com> Acked-by: Howard Chu <howardchu95@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Gary Guo <gary@garyguo.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Trevor Gross <tmgross@umich.edu> Cc: Weilin Wang <weilin.wang@intel.com> Link: https://lore.kernel.org/r/20250528032637.198960-7-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-28perf test intel-pt: Skip jitdump test if no libelfIan Rogers
jitdump support is only present if building with libelf. Skip the intel-pt jitdump test if perf isn't compiled with libelf support. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Gary Guo <gary@garyguo.net> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Trevor Gross <tmgross@umich.edu> Cc: Weilin Wang <weilin.wang@intel.com> Link: https://lore.kernel.org/r/20250528032637.198960-6-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-28perf test demangle-java: Don't segv if demangling failsIan Rogers
The buffer returned by dso__demangle_sym() may be NULL, don't segv in strcmp if this happens. Currently this happens for NO_LIBELF=1 builds. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Gary Guo <gary@garyguo.net> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Trevor Gross <tmgross@umich.edu> Cc: Weilin Wang <weilin.wang@intel.com> Link: https://lore.kernel.org/r/20250528032637.198960-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-28perf machine: Factor creating a "live" machine out of dwarf-unwindIan Rogers
Factor out for use in places other than the dwarf unwinding tests for libunwind. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Anne Macedo <retpolanne@posteo.net> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yicong Yang <yangyicong@hisilicon.com> Link: https://lore.kernel.org/r/20250313052952.871958-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-27perf test: Add AMD IBS sw filter testNamhyung Kim
The kernel v6.14 added 'swfilt' to support privilege filtering in software so that IBS can be used by regular users. Add a test case in x86 to verify the behavior. $ sudo perf test -vv 'IBS software filter' 113: AMD IBS software filtering: --- start --- test child forked, pid 178826 check availability of IBS swfilt run perf record with modifier and swfilt [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 0 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] check number of samples with swfilt [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.037 MB - ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.041 MB - ] ---- end(0) ---- 113: AMD IBS software filtering : Ok Reviewed-by: Ravi Bangoria <ravi.bangoria@amd.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> # On a 9950x3d Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250524002754.1266681-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-24perf tests switch-tracking: Fix timestamp comparisonLeo Yan
The test might fail on the Arm64 platform with the error: # perf test -vvv "Track with sched_switch" Missing sched_switch events # The issue is caused by incorrect handling of timestamp comparisons. The comparison result, a signed 64-bit value, was being directly cast to an int, leading to incorrect sorting for sched events. The case does not fail everytime, usually I can trigger the failure after run 20 ~ 30 times: # while true; do perf test "Track with sched_switch"; done 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : FAILED! 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok 106: Track with sched_switch : FAILED! 106: Track with sched_switch : Ok 106: Track with sched_switch : Ok I used cross compiler to build Perf tool on my host machine and tested on Debian / Juno board. Generally, I think this issue is not very specific to GCC versions. As both internal CI and my local env can reproduce the issue. My Host Build compiler: # aarch64-linux-gnu-gcc --version aarch64-linux-gnu-gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0 Juno Board: # lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 12 (bookworm) Release: 12 Codename: bookworm Fix this by explicitly returning 0, 1, or -1 based on whether the result is zero, positive, or negative. Fixes: d44bc558297222d9 ("perf tests: Add a test for tracking with sched_switch") Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Leo Yan <leo.yan@arm.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: James Clark <james.clark@linaro.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250331172759.115604-1-leo.yan@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-22perf tests trace_summary.sh: Run in exclusive modeArnaldo Carvalho de Melo
And it is being successfull only when running alone, probably because there are some tests that add the vfs_getname probe that gets used by 'perf trace' and alter how it does syscall arg pathname resolution. This should be removed or made a fallback to the preferred BPF mode of getting syscall parameters, but till then, run this in exclusive mode. For reference, here are some of the tests that run close to this one: 127: perf record offcpu profiling tests : Ok 128: perf all PMU test : Ok 129: perf stat --bpf-counters test : Ok 130: Check Arm CoreSight trace data recording and synthesized samples: Skip 131: Check Arm CoreSight disassembly script completes without errors : Skip 132: Check Arm SPE trace data recording and synthesized samples : Skip 133: Test data symbol : Ok 134: Miscellaneous Intel PT testing : Skip 135: test Intel TPEBS counting mode : Skip 136: perf script task-analyzer tests : Ok 137: Check open filename arg using perf trace + vfs_getname : Ok 138: perf trace summary : Ok Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ian Rogers <irogers@google.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/aC-hHTgArwlF_zu9@x1 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-22perf test: Add cgroup summary test case for 'perf trace'Namhyung Kim
$ sudo ./perf test -vv 112 112: perf trace summary: --- start --- test child forked, pid 1018940 testing: perf trace -s -- true testing: perf trace -S -- true testing: perf trace -s --summary-mode=thread -- true testing: perf trace -S --summary-mode=total -- true testing: perf trace -as --summary-mode=thread --no-bpf-summary -- true testing: perf trace -as --summary-mode=total --no-bpf-summary -- true testing: perf trace -as --summary-mode=thread --bpf-summary -- true testing: perf trace -as --summary-mode=total --bpf-summary -- true testing: perf trace -aS --summary-mode=total --bpf-summary -- true testing: perf trace -as --summary-mode=cgroup --bpf-summary -- true testing: perf trace -aS --summary-mode=cgroup --bpf-summary -- true ---- end(0) ---- 112: perf trace summary : Ok Reviewed-by: Howard Chu <howardchu95@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250522142551.1062417-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-20perf test probe_vfs_getname: Add regex for searching probe lineLeo Yan
Since commit 611851010c74046c ("fs: dedup handling of struct filename init and refcounts bumps"), the kernel has been refactored to use a new inline function initname(), moving name initialization into it. As a result, the perf probe test can no longer find the source line that matches the defined regular expressions. This causes the script to fail when attempting to add probes. Add a regular expression to search for the call site of initname(). This provides a valid source line number for adding the probe. Keeps the older regular expressions for passing test on older kernels. Fixes: 611851010c74046c ("fs: dedup handling of struct filename init and refcounts bumps") Suggested-by: Arnaldo Carvalho de Melo <acme@kernel.org> Signed-off-by: Leo Yan <leo.yan@arm.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Christian Brauner <brauner@kernel.org> Cc: Ian Rogers <irogers@google.com> Cc: Jakub Brnak <jbrnak@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mateusz Guzik <mjguzik@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250519082755.1669187-1-leo.yan@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-15perf test: Allow tolerance for leader sampling testChun-Tse Shao
There is a known issue that the leader sampling is inconsistent, since throttle only affect leader, not the slave. The detail is in [1]. To maintain test coverage, this patch sets a tolerance rate of 80% to accommodate the throttled samples and prevent test failures due to throttling. [1] lore.kernel.org/20250328182752.769662-1-ctshao@google.com Suggested-by: Ian Rogers <irogers@google.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Chun-Tse Shao <ctshao@google.com> Co-developed-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: https://lore.kernel.org/r/20250430140611.599078-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-14perf test: Add stat uniquifying testChun-Tse Shao
The `stat+uniquify.sh` test retrieves all uniquified `clockticks` events from `perf list -v clockticks` and check if `perf stat -e clockticks -A` contains all of them. Committer testing: root@x1:~# grep -m1 "model name" /proc/cpuinfo model name : 13th Gen Intel(R) Core(TM) i7-1365U root@x1:~# perf list clockticks List of pre-defined events (to be used in -e or -M): uncore_clock/clockticks/ [Kernel PMU event] uncore memory: unc_m_clockticks [Number of clocks. Unit: uncore_imc] root@x1:~# root@x1:~# perf test uniquifying 92: perf stat events uniquifying : Ok root@x1:~# perf test -vv uniquifying 92: perf stat events uniquifying: --- start --- test child forked, pid 1552628 stat event uniquifying test ---- end(0) ---- 92: perf stat events uniquifying : Ok root@x1:~# Signed-off-by: Chun-Tse Shao <ctshao@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: Andi Kleen <ak@linux.intel.com> Cc: Dr. David Alan Gilbert <linux@treblig.org> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Levi Yun <yeoreum.yun@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Weilin Wang <weilin.wang@intel.com> Link: https://lore.kernel.org/r/20250513215401.2315949-4-ctshao@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-13perf test: Update sysfs path for core PMU capsNamhyung Kim
While CPU is a system device, it'd be better to use a path for event_source devices when it checks PMU capability. Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250509213017.204343-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-13perf test: Fix LBR test by ignoring idle taskNamhyung Kim
I found 'perf record LBR tests' failing due to empty branch stacks. $ perf test -v LBR ... LBR system wide any branch test Lowering default frequency rate from 4000 to 1000. Please consider tweaking /proc/sys/kernel/perf_event_max_sample_rate. [ perf record: Woken up 8 times to write data ] [ perf record: Captured and wrote 3.142 MB /tmp/__perf_test.perf.data.dgSBl (3572 samples) ] LBR system wide any branch test: 3572 samples LBR system wide any branch test [Failed empty br stack ratio exceed 2%: 3%] LBR system wide any call test Lowering default frequency rate from 4000 to 1000. Please consider tweaking /proc/sys/kernel/perf_event_max_sample_rate. [ perf record: Woken up 8 times to write data ] [ perf record: Captured and wrote 3.337 MB /tmp/__perf_test.perf.data.dgSBl (3967 samples) ] LBR system wide any call test: 3967 samples LBR system wide any call test [Failed empty br stack ratio exceed 2%: 9%] ... The failing cases were in system-wide mode and I realized that the samples were from the idle tasks (swapper). I suspect going to/from idle state may affect the LBR contents. If we can skip empty branch stacks from the idle tasks, the failure should go away. I can see the following output in perf report -D. $ perf report -D | grep -m5 -A3 'branch stack: nr:0' ... -- ... branch stack: nr:0 ... thread: swapper:0 ...... dso: /proc/kcore -- ... branch stack: nr:0 ... thread: swapper:0 ...... dso: /proc/kcore -- ... branch stack: nr:0 ... thread: DefaultEventMan:10282 ...... dso: /proc/kcore -- ... branch stack: nr:0 ... thread: swapper:0 ...... dso: /proc/kcore -- ... branch stack: nr:0 ... thread: swapper:0 ...... dso: /proc/kcore $ perf report -D | grep -c 'branch stack: nr:0' 145 $ perf report -D | grep -A3 'branch stack: nr:0' | grep thread | grep -c swapper i36 $ perf report -D | grep -A3 'branch stack: nr:0' | grep thread | grep -cv swapper 9 Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250509213017.204343-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-13perf test: Hybrid improvements for metric value validation testIan Rogers
On my alderlake I currently see for the "perf metrics value validation" test: ``` Total Test Count: 142 Passed Test Count: 139 [ Metric Relationship Error: The collected value of metric ['tma_fetch_latency', 'tma_fetch_bandwidth', 'tma_frontend_bound'] is [31.137028] in workload(s): ['perf bench futex hash -r 2 -s'] but expected value range is [tma_frontend_bound, tma_frontend_bound] Relationship rule description: 'Sum of the level 2 children should equal level 1 parent', Metric Relationship Error: The collected value of metric ['tma_memory_bound', 'tma_core_bound', 'tma_backend_bound'] is [6.564442] in workload(s): ['perf bench futex hash -r 2 -s'] but expected value range is [tma_backend_bound, tma_backend_bound] Relationship rule description: 'Sum of the level 2 children should equal level 1 parent', Metric Relationship Error: The collected value of metric ['tma_light_operations', 'tma_heavy_operations', 'tma_retiring'] is [57.806179] in workload(s): ['perf bench futex hash -r 2 -s'] but expected value range is [tma_retiring, tma_retiring] Relationship rule description: 'Sum of the level 2 children should equal level 1 parent'] Metric validation return with erros. Please check metrics reported with errors. ``` I suspect it is due to two metrics for different CPU types being enabled. Add a -cputype option to avoid this. The test still fails with: ``` Total Test Count: 115 Passed Test Count: 114 [ Wrong Metric Value Error: The collected value of metric ['tma_l2_hit_latency'] is [117.947088] in workload(s): ['perf bench futex hash -r 2 -s'] but expected value range is [0, 100]] Metric validation return with errors. Please check metrics reported with errors. ``` which is a reproducible genuine error and likely requires a metric fix. Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Falcon <thomas.falcon@intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Weilin Wang <weilin.wang@intel.com> Link: https://lore.kernel.org/r/20250512184700.11691-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-13perf pmu: Change aliases from list to hashmapIan Rogers
Finding an alias for things like perf_pmu__have_event() would need to search the aliases list, whilst this happens relatively infrequently it can be a significant overhead in testing. Switch to using a hashmap. Move common initialization code to perf_pmu__init(). Refactor the test 'struct perf_pmu_test_pmu' to not have perf pmu within it to better support the perf_pmu__init() function. Before: ``` $ time perf test "Parsing of PMU event table metrics" 10.3: Parsing of PMU event table metrics : Ok 10.4: Parsing of PMU event table metrics with fake PMUs : Ok real 0m13.287s user 0m13.026s sys 0m0.532s ``` After: ``` $ time perf test "Parsing of PMU event table metrics" 10.3: Parsing of PMU event table metrics : Ok 10.4: Parsing of PMU event table metrics with fake PMUs : Ok real 0m13.011s user 0m12.885s sys 0m0.485s ``` Committer testing: root@number:~# grep -m1 'model name' /proc/cpuinfo model name : AMD Ryzen 9 9950X3D 16-Core Processor root@number:~# Before: root@number:~# time perf test "Parsing of PMU event table metrics" 10.3: Parsing of PMU event table metrics : Ok 10.4: Parsing of PMU event table metrics with fake PMUs : Ok real 0m9.296s user 0m9.361s sys 0m0.063s root@number:~# After: root@number:~# time perf test "Parsing of PMU event table metrics" 10.3: Parsing of PMU event table metrics : Ok 10.4: Parsing of PMU event table metrics with fake PMUs : Ok real 0m9.286s user 0m9.354s sys 0m0.062s root@number:~# Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Thomas Richter <tmricht@linux.ibm.com> Cc: Xu Yang <xu.yang_2@nxp.com> Link: https://lore.kernel.org/r/20250512194622.33258-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-12perf tests: Harden branch stack sampling testIan Rogers
On continuous testing the perf script output can be empty, or nearly empty, causing tr/grep to exit and due to "set -e" the test traps and fails. Add some empty file handling that sets the test to skip and make grep and other text rewriting failures non-fatal by adding "|| true". Committer testing: root@number:~# grep -m1 "model name" /proc/cpuinfo model name : AMD Ryzen 9 9950X3D 16-Core Processor root@number:~# perf test "Check branch stack sampling" 104: Check branch stack sampling : Ok root@number:~# root@number:~# perf test -vvvvvvv "Check branch stack sampling" 104: Check branch stack sampling: --- start --- test child forked, pid 396047 142d22-142da0 l brstack_bench perf does have symbol 'brstack_bench' Testing user branch stack sampling Testing branch stack filtering permutation (any_call,CALL|IND_CALL|COND_CALL|SYSCALL|IRQ) Testing branch stack filtering permutation (call,CALL|SYSCALL) Testing branch stack filtering permutation (cond,COND) Testing branch stack filtering permutation (any_ret,RET|COND_RET|SYSRET|ERET) Testing branch stack filtering permutation (call,cond,CALL|SYSCALL|COND) Testing branch stack filtering permutation (any_call,cond,CALL|IND_CALL|COND_CALL|IRQ|SYSCALL|COND) Testing branch stack filtering permutation (cond,any_call,any_ret,COND|CALL|IND_CALL|COND_CALL|SYSCALL|IRQ|RET|COND_RET|SYSRET|ERET) ---- end(0) ---- 104: Check branch stack sampling : Ok root@number:~# Signed-off-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: Anshuman Khandual <anshuman.khandual@arm.com> Cc: German Gomez <german.gomez@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250318161639.34446-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-12perf tests metrics: Permission related fixesIan Rogers
When permissions are limited running sleep without system wide isn't a good benchmark to run to achieve samples, switch to running noploop. Remove indent for non-success cases. Allow skip for the not counted case. Minor debug changes. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Weilin Wang <weilin.wang@intel.com> Link: https://lore.kernel.org/r/20250412004704.2297939-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-09perf test demangle-ocaml: Switch to using dso__demangle_sym()Ian Rogers
The use of the demangle-ocaml APIs means we don't detect if a different demangler is used before the OCaml one for the case that matters to perf. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Ariel Ben-Yehuda <ariel.byd@gmail.com> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Bill Wendling <morbo@google.com> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Daniel Xu <dxu@dxuuu.xyz> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Gary Guo <gary@garyguo.net> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Trevor Gross <tmgross@umich.edu> Link: https://lore.kernel.org/r/20250430004128.474388-7-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-09perf test demangle-java: Switch to using dso__demangle_sym()Ian Rogers
The use of the demangle-java APIs means we don't detect if a different demangler is used before the Java one for the case that matters to perf. Remove the return types from the demangled names as dso__demangle_sym() removes those. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Ariel Ben-Yehuda <ariel.byd@gmail.com> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Bill Wendling <morbo@google.com> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Daniel Xu <dxu@dxuuu.xyz> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Gary Guo <gary@garyguo.net> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Trevor Gross <tmgross@umich.edu> Link: https://lore.kernel.org/r/20250430004128.474388-6-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-09perf test demangle-rust: Add Rust demangling testIan Rogers
The test cases are listed examples in: https://doc.rust-lang.org/rustc/symbol-mangling/v0.html This test was previously part of a different Rust v0 demangler: https://lore.kernel.org/lkml/20250129193037.573431-1-irogers@google.com/ Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Ariel Ben-Yehuda <ariel.byd@gmail.com> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Bill Wendling <morbo@google.com> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Daniel Xu <dxu@dxuuu.xyz> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Gary Guo <gary@garyguo.net> Cc: Howard Chu <howardchu95@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Justin Stitt <justinstitt@google.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Stephen Brennan <stephen.s.brennan@oracle.com> Cc: Trevor Gross <tmgross@umich.edu> Link: https://lore.kernel.org/r/20250430004128.474388-5-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-05perf test: Add direct off-cpu testsHoward Chu
Since we added --off-cpu-thresh, add tests for when a sample's off-cpu time is above the threshold, and when it's below the threshold. Note that the basic test performed in test_offcpu_basic() collects a direct sample now, since sleep 1 has duration of 1000ms, higher than the default value of --off-cpu-thresh of 500ms, resulting in a direct sample. An example: $ sudo perf test offcpu 124: perf record offcpu profiling tests : Ok $ Committer testing: root@number:~# perf test offcpu 126: perf record offcpu profiling tests : Ok root@number:~# perf test -v offcpu 126: perf record offcpu profiling tests : Ok root@number:~# perf test -vv offcpu 126: perf record offcpu profiling tests: --- start --- test child forked, pid 1410791 Checking off-cpu privilege Basic off-cpu test Basic off-cpu test [Success] Child task off-cpu test Child task off-cpu test [Success] Threshold test (above threshold) Threshold test (above threshold) [Success] Threshold test (below threshold) Threshold test (below threshold) [Success] ---- end(0) ---- 126: perf record offcpu profiling tests : Ok root@number:~# Suggested-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Howard Chu <howardchu95@gmail.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Gautam Menghani <gautam@linux.ibm.com> Tested-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250501022809.449767-11-howardchu95@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-05-02perf test perf-report-hierarchy: Add new testArnaldo Carvalho de Melo
Super simple test to check that at least we're not segfaulting when trying to use 'perf report --hierarchy', more subtests should be added to make sure the output is the expected one. This is being merged right before a fix for that that this test detects: # perf test hierarchy 83: perf report --hierarchy : FAILED! # perf test -v hierarchy --- start --- test child forked, pid 102242 perf report --hierarchy Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.025 MB /tmp/perf-test-report.HX0N85TlPq/perf-report-hierarchy-perf.data (6 samples) ] perf: ui/hist.c:603: fmt_free: Assertion `!(!list_empty(&fmt->sort_list))' failed. /home/acme/libexec/perf-core/tests/shell/perf-report-hierarchy.sh: line 34: 102250 Aborted (core dumped) perf report --hierarchy > /dev/null --- Cleaning up --- ---- end(-1) ---- 83: perf report --hierarchy : FAILED! # Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Link: https://lore.kernel.org/lkml/20250430180321.736939-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2025-04-29perf mem/c2c amd: Add ldlat supportRavi Bangoria
'perf mem/c2c' uses IBS Op PMU on AMD platforms. IBS Op PMU on Zen5 uarch has added support for Load Latency filtering. Implement 'perf mem/c2c' --ldlat using IBS Op Load Latency filtering capability. Some subtle differences between AMD and other arch: o --ldlat is disabled by default on AMD o Supported values are 128 to 2048. Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Ananth Narayan <ananth.narayan@amd.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Mario <jmario@redhat.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Santosh Shukla <santosh.shukla@amd.com> Cc: Stephane Eranian <eranian@google.com> Link: https://lore.kernel.org/r/20250429035938.1301-4-ravi.bangoria@amd.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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