On Thu, Apr 10, 2025 at 10:36 AM Ian Rogers <irogers@xxxxxxxxxx> wrote: > > Rather than scanning /proc and skipping PIDs based on their UIDs, use > BPF filters for uid filtering. The /proc scanning in thread_map is > racy as the PID may exit before the perf_event_open causing perf to > abort. BPF UID filters are more robust as they avoid the race. Add a > helper for commands that support UID filtering and wire up. Remove the > non-BPF UID filtering support given it doesn't work. > > v2: Add a perf record uid test (Namhyung) and force setting > system-wide for perf trace and perf record (Namhyung). Ensure the > uid filter isn't set on tracepoint evsels. > > v1: https://lore.kernel.org/lkml/20250111190143.1029906-1-irogers@xxxxxxxxxx/ Ping. Thanks, Ian > Ian Rogers (12): > perf tests record: Cleanup improvements > perf bench evlist-open-close: Reduce scope of 2 variables > perf parse-events filter: Use evsel__find_pmu > perf target: Separate parse_uid into its own function > perf parse-events: Add parse_uid_filter helper > perf record: Switch user option to use BPF filter > perf tests record: Add basic uid filtering test > perf top: Switch user option to use BPF filter > perf trace: Switch user option to use BPF filter > perf bench evlist-open-close: Switch user option to use BPF filter > perf target: Remove uid from target > perf thread_map: Remove uid options > > tools/perf/bench/evlist-open-close.c | 76 ++++++++++++--------- > tools/perf/builtin-ftrace.c | 1 - > tools/perf/builtin-kvm.c | 2 - > tools/perf/builtin-record.c | 27 +++++--- > tools/perf/builtin-stat.c | 4 +- > tools/perf/builtin-top.c | 22 +++--- > tools/perf/builtin-trace.c | 27 +++++--- > tools/perf/tests/backward-ring-buffer.c | 1 - > tools/perf/tests/event-times.c | 8 +-- > tools/perf/tests/keep-tracking.c | 2 +- > tools/perf/tests/mmap-basic.c | 2 +- > tools/perf/tests/openat-syscall-all-cpus.c | 2 +- > tools/perf/tests/openat-syscall-tp-fields.c | 1 - > tools/perf/tests/openat-syscall.c | 2 +- > tools/perf/tests/perf-record.c | 1 - > tools/perf/tests/perf-time-to-tsc.c | 2 +- > tools/perf/tests/shell/record.sh | 36 ++++++++-- > tools/perf/tests/switch-tracking.c | 2 +- > tools/perf/tests/task-exit.c | 1 - > tools/perf/tests/thread-map.c | 2 +- > tools/perf/util/bpf-filter.c | 2 +- > tools/perf/util/evlist.c | 3 +- > tools/perf/util/parse-events.c | 33 ++++++--- > tools/perf/util/parse-events.h | 1 + > tools/perf/util/python.c | 10 +-- > tools/perf/util/target.c | 54 ++------------- > tools/perf/util/target.h | 15 +--- > tools/perf/util/thread_map.c | 32 +-------- > tools/perf/util/thread_map.h | 6 +- > tools/perf/util/top.c | 4 +- > tools/perf/util/top.h | 1 + > 31 files changed, 178 insertions(+), 204 deletions(-) > > -- > 2.49.0.604.gff1f9ca942-goog >
