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

Dmitry Vyukov
2025-02-07T11:44:37Z

On Fri, 7 Feb 2025 at 04:57, Namhyung Kim <namhyung@kernel.org> wrote:
>
> 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@google.com> wrote:
> > > On Thu, 6 Feb 2025 at 19:30, Andi Kleen <ak@linux.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

Thanks, Namhyung, Andi, Ian, this is useful.

Added tests in v6: