linux-kernel - Re: [PATCH v5 0/8] perf report: Add latency and parallelism profiling

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Message-ID: <Z6WEkAPxtpVmx8cO@google.com>
Date: Thu, 6 Feb 2025 19:57:04 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>, Andi Kleen <ak@...ux.intel.com>,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: Re: [PATCH v5 0/8] perf report: Add latency and parallelism profiling

On Thu, Feb 06, 2025 at 10:51:16AM -0800, Ian Rogers wrote:
> On Thu, Feb 6, 2025 at 10:41 AM Dmitry Vyukov <dvyukov@...gle.com> wrote:
> > On Thu, 6 Feb 2025 at 19:30, Andi Kleen <ak@...ux.intel.com> wrote:
> [snip]
> > > We traditionally didn't do it, but in general test coverage
> > > of perf report is too low, so I would recommend to add some simple
> > > test case in the perf test scripts.
> >
> > What of this is testable within the current testing framework?
> > Also how do I run tests? I failed to figure it out.
> 
> Often just having a test that ensure a command doesn't segfault is
> progress :-) The shell tests Andi mentions are here:
> https://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools-next.git/tree/tools/perf/tests/shell?h=perf-tools-next
> There's no explicit `perf report` test there but maybe the annotate,
> diff or record tests could give you some ideas.

Well, we have. :)

  $ ./perf test -vv report
  116: perftool-testsuite_report:
  --- start ---
  test child forked, pid 109653
  -- [ PASS ] -- perf_report :: setup :: prepare the perf.data file
  ## [ PASS ] ## perf_report :: setup SUMMARY
  -- [ SKIP ] -- perf_report :: test_basic :: help message :: testcase skipped
  -- [ PASS ] -- perf_report :: test_basic :: basic execution
  -- [ PASS ] -- perf_report :: test_basic :: number of samples
  -- [ PASS ] -- perf_report :: test_basic :: header
  -- [ PASS ] -- perf_report :: test_basic :: header timestamp
  -- [ PASS ] -- perf_report :: test_basic :: show CPU utilization
  -- [ PASS ] -- perf_report :: test_basic :: pid
  -- [ PASS ] -- perf_report :: test_basic :: non-existing symbol
  -- [ PASS ] -- perf_report :: test_basic :: symbol filter
  ## [ PASS ] ## perf_report :: test_basic SUMMARY
  ---- end(0) ----
  116: perftool-testsuite_report                                       : Ok

Thanks,
Namhyung