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| author |   Jin Yao <yao.jin@linux.intel.com> | 2021-02-19 15:00:05 +0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-03 12:59:27 -0300 |
| commit | 2e989f82181cd414599c6afbc5a666356a3d1dd1 (patch) | |
| tree | be605e4d406405e8ffebb8b89824cf9950240fac /tools/perf/Documentation/perf-report.txt | |
| parent | perf metric: Remove unneeded semicolon (diff) | |
| download | linux-dev-2e989f82181cd414599c6afbc5a666356a3d1dd1.tar.xz linux-dev-2e989f82181cd414599c6afbc5a666356a3d1dd1.zip | |
perf report: Create option to disable raw event ordering
Warning "dso not found" is reported when using "perf report -D".
66702781413407 0x32c0 [0x30]: PERF_RECORD_SAMPLE(IP, 0x2): 28177/28177: 0x55e493e00563 period: 106578 addr: 0
... thread: perf:28177
...... dso: <not found>
66702727832429 0x9dd8 [0x38]: PERF_RECORD_COMM exec: triad_loop:28177/28177
The PERF_RECORD_SAMPLE event (timestamp: 66702781413407) should be after the
PERF_RECORD_COMM event (timestamp: 66702727832429), but it's early processed.
So for most of cases, it makes sense to keep the event ordered even for dump
mode. But it would be also useful to disable ordered_events for reporting raw
dump to see events as they are stored in the perf.data file.
So now, set ordered_events by default to true and add a new option
'disable-order' to disable it. For example,
perf report -D --disable-order
Fixes: 977f739b7126b ("perf report: Disable ordered_events for raw dump")
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210219070005.12397-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-report.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index f546b5e9db05..87112e8d904e 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -224,6 +224,9 @@ OPTIONS --dump-raw-trace:: Dump raw trace in ASCII. +--disable-order:: + Disable raw trace ordering. + -g:: --call-graph=<print_type,threshold[,print_limit],order,sort_key[,branch],value>:: Display call chains using type, min percent threshold, print limit, |