Re: [PATCH v5 00/10] Run tests in parallel showing number of tests running

[Athira Rajeev <atrajeev@linux.vnet.ibm.com>]

> On 26 Oct 2024, at 12:50 AM, Ian Rogers <irogers@google.com> wrote:
> 
> Avoid waitpid so that stdout/stderr aren't destroyed prior to wanting
> to read them for display. When running on a color terminal, display
> the number of running tests (1 if sequential). To avoid previous
> flicker, only delete and refresh the display line when it changes. An
> earlier version of this code is here:
> https://lore.kernel.org/lkml/20240701044236.475098-1-irogers@google.com/
> 
> Add a signal handler for perf tests so that unexpected signals are
> displayed and test clean up is possible.
> 
> In perf test add an "exclusive" flag that causes a test to be run with
> no other test. Set this flag manually for C tests and via a
> "(exclusive)" in the test description for shell tests. Add the flag to
> shell tests that may fail when run with other tests.
> 
> Change the perf test loop to run in two passes. For parallel
> execution, the first pass runs all tests that can be run in parallel
> then the 2nd runs remaining tests sequentially. This causes the
> "exclusive" tests to be run last and with test numbers moderately out
> of alignment.
> 
> Change the default to be to run tests in parallel. Running tests in
> parallel brings the execution time down to less than half.
> 
> v5: Make width robust to signal delivery (Namhyung). Minor signal
>    print message tweaks and test kill value.
> 
> v4: Add patch to sort exclusive tests last, this allows for increasing
>    test numbers as requested by Namhyung.
> 
> v3: Mark additional shell tests as "(exclusive)" to avoid issues with
>    shared resources suggested by Namhyung. Add dependent signal
>    handler change so that kill/ctrl-C don't leave lots of processes,
>    previously sent here:
>    https://lore.kernel.org/lkml/20241017052137.225514-1-irogers@google.com/
> 
> v2: Fix inaccurate remaining counts when running specific
>    tests. Rename "remaining" to "active" to better reflect the
>    testing behavior. Move the exclusive flag to test cases and not
>    entire suites. Add more "(exclusive)" flags to test as
>    suggested-by James Clark. Remove "(exclusive)" flag from test
>    descriptions to keep the command line output more concise. Add
>    James Clark's tested-by.
> 
> Ian Rogers (10):
>  tools subcmd: Add non-waitpid check_if_command_finished()
>  perf test: Display number of active running tests
>  perf test: Reduce scope of parallel variable
>  perf test: Avoid list test blocking on writing to stdout
>  perf test: Tag parallel failing shell tests with "(exclusive)"
>  perf test: Add a signal handler around running a test
>  perf test: Run parallel tests in two passes
>  perf test: Make parallel testing the default
>  perf test: Add a signal handler to kill forked child processes
>  perf test: Sort tests placing exclusive tests last

Tested-by : Athira Rajeev <atrajeev@linux.vnet.ibm.com <mailto:atrajeev@linux.vnet.ibm.com>>

Thanks
Athira Rajeev
> 
> tools/lib/subcmd/run-command.c                |  33 ++
> tools/perf/tests/builtin-test.c               | 408 ++++++++++++------
> .../tests/shell/coresight/asm_pure_loop.sh    |   2 +-
> .../shell/coresight/memcpy_thread_16k_10.sh   |   2 +-
> .../coresight/thread_loop_check_tid_10.sh     |   2 +-
> .../coresight/thread_loop_check_tid_2.sh      |   2 +-
> .../shell/coresight/unroll_loop_thread_10.sh  |   2 +-
> tools/perf/tests/shell/list.sh                |   5 +-
> .../tests/shell/perftool-testsuite_report.sh  |   2 +-
> tools/perf/tests/shell/probe_vfs_getname.sh   |   2 +-
> .../shell/record+script_probe_vfs_getname.sh  |   2 +-
> tools/perf/tests/shell/record.sh              |   2 +-
> tools/perf/tests/shell/record_lbr.sh          |   2 +-
> tools/perf/tests/shell/record_offcpu.sh       |   2 +-
> tools/perf/tests/shell/stat_all_pmu.sh        |   2 +-
> tools/perf/tests/shell/stat_bpf_counters.sh   |   2 +-
> tools/perf/tests/shell/test_arm_coresight.sh  |   2 +-
> .../tests/shell/test_arm_coresight_disasm.sh  |   2 +-
> tools/perf/tests/shell/test_arm_spe.sh        |   2 +-
> tools/perf/tests/shell/test_data_symbol.sh    |   2 +-
> tools/perf/tests/shell/test_intel_pt.sh       |   2 +-
> .../perf/tests/shell/test_stat_intel_tpebs.sh |   2 +-
> .../tests/shell/trace+probe_vfs_getname.sh    |   2 +-
> tools/perf/tests/task-exit.c                  |   9 +-
> tools/perf/tests/tests-scripts.c              |   7 +-
> tools/perf/tests/tests.h                      |   9 +
> tools/perf/util/color.h                       |   1 +
> 27 files changed, 367 insertions(+), 145 deletions(-)
> 
> -- 
> 2.47.0.163.g1226f6d8fa-goog
>