linux/tools/perf/tests, branch v6.17

perf test: Checking BPF metadata collection fails on version string

2025-09-04T23:37:19Z

commit edf2cadf01e8f ("perf test: add test for BPF metadata collection") fails consistently on the version string check. The perf version string on some of the constant integration test machines contains characters with special meaning in grep's extended regular expression matching algorithm. The output of perf version is: # perf version perf version 6.17.0-20250814.rc1.git20.24ea63ea3877.63.fc42.s390x+git # and the '+' character has special meaning in egrep command. Also the use of egrep is deprecated. Change the perf version string check to fixed character matching and get rid of egrep's warning being deprecated. Use grep -F instead. Output before: # perf test -F 102 Checking BPF metadata collection egrep: warning: egrep is obsolescent; using grep -E Basic BPF metadata test [Failed invalid output] 102: BPF metadata collection test : FAILED! # Output after: # perf test -F 102 Checking BPF metadata collection Basic BPF metadata test [Success] 102: BPF metadata collection test : Ok # Fixes: edf2cadf01e8f ("perf test: add test for BPF metadata collection") Signed-off-by: Thomas Richter Reviewed-by: Ian Rogers Reviewed-by: Arnaldo Carvalho de Melo Acked-by: Sumanth Korikkar Cc: Blake Jones Link: https://lore.kernel.org/r/20250822122540.4104658-1-tmricht@linux.ibm.com Signed-off-by: Namhyung Kim

perf tests: Fix "PE file support" test build

2025-09-03T17:50:55Z

filename__read_build_id() now takes a blocking/non-blocking argument. The original behavior of filename__read_build_id() was blocking so add block=true to fix the build. Fixes: 2c369d91d093 ("perf symbol: Add blocking argument to filename__read_build_id") Signed-off-by: James Clark Reviewed-by: Ian Rogers Reviewed-by: Arnaldo Carvalho de Melo Link: https://lore.kernel.org/r/20250903-james-perf-read-build-id-fix-v1-1-6a694d0a980f@linaro.org Signed-off-by: Namhyung Kim

perf symbol: Add blocking argument to filename__read_build_id

2025-08-25T22:07:18Z

When synthesizing build-ids, for build ID mmap2 events, they will be added for data mmaps if -d/--data is specified. The files opened for their build IDs may block on the open causing perf to hang during synthesis. There is some robustness in existing calls to filename__read_build_id by checking the file path is to a regular file, which unfortunately fails for symlinks. Rather than adding more is_regular_file calls, switch filename__read_build_id to take a "block" argument and specify O_NONBLOCK when this is false. The existing is_regular_file checking callers and the event synthesis callers are made to pass false and thereby avoiding the hang. Fixes: 53b00ff358dc ("perf record: Make --buildid-mmap the default") Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250823000024.724394-3-irogers@google.com Signed-off-by: Namhyung Kim

perf test: Ensure lock contention using pipe mode

2025-07-30T20:38:53Z

The 'kernel lock contention analysis test' requires reliable triggering of lock contention. On some systems, previous benchmark calls failed to generate sufficient contention due to low system activity or resource limits. This patch adds the -p (pipe) option to all calls of perf bench sched messaging, ensuring consistent lock contention without relying on socket-based communication. Suggested-by: Thomas Richter Signed-off-by: Jan Polensky Link: https://lore.kernel.org/r/20250725170801.3176678-1-japo@linux.ibm.com Signed-off-by: Namhyung Kim

perf test: Fix comment ordering

2025-07-26T22:34:48Z

The previous commit that introduced this test overlooked a behavior of "perf test list", causing it to print "SPDX-License-Identifier: GPL-2.0" as a description for that test. This reorders the comments to fix that issue. Fixes: edf2cadf01e8 ("perf test: add test for BPF metadata collection") Signed-off-by: Blake Jones Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250726004023.3466563-1-blakejones@google.com [ update the commit message a little bit ] Signed-off-by: Namhyung Kim

perf sort: Use perf_env to set arch sort keys and header

2025-07-25T17:37:58Z

Previously arch_support_sort_key and arch_perf_header_entry used a weak symbol to compile as appropriate for x86 and powerpc. A limitation to this is that the handling of a data file could vary in cross-platform development. Change to using the perf_env of the current session to determine the architecture kind and set the sort key and header entries as appropriate. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-23-irogers@google.com Signed-off-by: Namhyung Kim

perf test: Move PERF_SAMPLE_WEIGHT_STRUCT parsing to common test

2025-07-25T17:37:58Z

test__x86_sample_parsing is identical to test__sample_parsing except it explicitly tested PERF_SAMPLE_WEIGHT_STRUCT. Now the parsing code is common move the PERF_SAMPLE_WEIGHT_STRUCT to the common sample parsing test and remove the x86 version. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-22-irogers@google.com Signed-off-by: Namhyung Kim

perf machine: Explicitly pass in host perf_env

2025-07-25T17:37:57Z

When creating a machine for the host explicitly pass in a scoped perf_env. This removes a use of the global perf_env. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-17-irogers@google.com Signed-off-by: Namhyung Kim

perf test: Avoid use perf_env

2025-07-25T17:37:57Z

The perf_env global variable holds the host perf_env data but its use is hit and miss. Switch to using local perf_env variables and ensure scoped perf_env__init and perf_env__exit. This loses command line setting of the perf_env, but this doesn't matter for tests. So the perf_env is fully initialized, clear it with memset in perf_env__init. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-13-irogers@google.com Signed-off-by: Namhyung Kim

perf evlist: Change env variable to session

2025-07-25T17:37:56Z

The session holds a perf_env pointer env. In UI code container_of is used to turn the env to a session, but this assumes the session header's env is in use. Rather than a dubious container_of, hold the session in the evlist and derive the env from the session with evsel__env, perf_session__env, etc. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-11-irogers@google.com Signed-off-by: Namhyung Kim