Hi Ian, On Tue, May 27, 2025 at 01:39:21PM -0700, Ian Rogers wrote: > On Fri, Apr 25, 2025 at 2:40 PM 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. The > > /proc scanning also misses processes starting after the perf > > command. Add a helper for commands that support UID filtering and wire > > up. Remove the non-BPF UID filtering support given it doesn't work. > > > > v3: Add lengthier commit messages as requested by Arnaldo. Rebase on > > tmp.perf-tools-next. > > > > 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, I'm ok with preferring BPF over /proc scanning, but still hesitate to remove it since some people don't use BPF. Can you please drop that part and make parse_uid_filter() conditional on BPF? Thanks, Namhyung > > Ian Rogers (10): > > 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 | 36 ++++++++------ > > 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 | 26 ++++++++++ > > 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, 150 insertions(+), 182 deletions(-) > > > > -- > > 2.49.0.850.g28803427d3-goog > >
