From 892ba7f18621a02af4428c58d97451f64685dba4 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Tue, 29 Jun 2021 21:30:58 -0700 Subject: perf report: Fix --task and --stat with pipe input Current 'perf report' fails to process a pipe input when --task or --stat options are used. This is because they reset all the tool callbacks and fails to find a matching event for a sample. When pipe input is used, the event info is passed via ATTR records so it needs to handle that operation. Otherwise the following error occurs. Note, -14 (= -EFAULT) comes from evlist__parse_sample(): # perf record -a -o- sleep 1 | perf report -i- --stat Can't parse sample, err = -14 0x271044 [0x38]: failed to process type: 9 Error: failed to process sample # Committer testing: Before: $ perf record -o- sleep 1 | perf report -i- --stat Can't parse sample, err = -14 [ perf record: Woken up 1 times to write data ] 0x1350 [0x30]: failed to process type: 9 Error: failed to process sample [ perf record: Captured and wrote 0.000 MB - ] $ After: $ perf record -o- sleep 1 | perf report -i- --stat [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.000 MB - ] Aggregated stats: TOTAL events: 41 COMM events: 2 ( 4.9%) EXIT events: 1 ( 2.4%) SAMPLE events: 9 (22.0%) MMAP2 events: 4 ( 9.8%) ATTR events: 1 ( 2.4%) FINISHED_ROUND events: 1 ( 2.4%) THREAD_MAP events: 1 ( 2.4%) CPU_MAP events: 1 ( 2.4%) EVENT_UPDATE events: 1 ( 2.4%) TIME_CONV events: 1 ( 2.4%) FEATURE events: 19 (46.3%) cycles:uhH stats: SAMPLE events: 9 $ Fixes: a4a4d0a7a2b20f78 ("perf report: Add --stats option to display quick data statistics") Signed-off-by: Namhyung Kim Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Andi Kleen Cc: Ian Rogers Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210630043058.1131295-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-report.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'tools') diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index bc5c393021dc..8639bbe0969d 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -729,9 +729,14 @@ static int count_sample_event(struct perf_tool *tool __maybe_unused, return 0; } +static int process_attr(struct perf_tool *tool __maybe_unused, + union perf_event *event, + struct evlist **pevlist); + static void stats_setup(struct report *rep) { memset(&rep->tool, 0, sizeof(rep->tool)); + rep->tool.attr = process_attr; rep->tool.sample = count_sample_event; rep->tool.no_warn = true; } @@ -753,6 +758,7 @@ static void tasks_setup(struct report *rep) rep->tool.mmap = perf_event__process_mmap; rep->tool.mmap2 = perf_event__process_mmap2; } + rep->tool.attr = process_attr; rep->tool.comm = perf_event__process_comm; rep->tool.exit = perf_event__process_exit; rep->tool.fork = perf_event__process_fork; -- cgit v1.2.3