perf report: Create option to disable raw event ordering
authorJin Yao <yao.jin@linux.intel.com>
Fri, 19 Feb 2021 07:00:05 +0000 (15:00 +0800)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 3 Mar 2021 15:59:27 +0000 (12:59 -0300)
commit2e989f82181cd414599c6afbc5a666356a3d1dd1
treebe605e4d406405e8ffebb8b89824cf9950240fac
parent81db00a4ea625c88925b00df9673472bd1b8c77f
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>
tools/perf/Documentation/perf-report.txt
tools/perf/builtin-report.c