Re: [PATCH v1] perf tests: Restore -p flag to lock contention test

[Namhyung Kim]

On Wed, 08 Jul 2026 10:53:11 -0700, Ian Rogers wrote:
> Commit ae42a2a2a3ae ("perf tests: Speed up lock contention analysis shell test")
> in linux-next heavily optimized the test runtimes by switching the workload from
> the default of 10 process groups down to 1 (`perf bench sched messaging -g 1`).
> 
> However, this change inadvertently dropped the original `-p` flag, causing the
> benchmark to default to `socketpair()` instead of `pipe()`. While `socketpair()`
> still generates some lock events on x86, it fails to trigger enough samples on
> architectures like s390, causing the test suite to fail due to lack of captured
> data.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung