[v2,0/3] kselftest/arm64: fp-stress performance improvements

Message

Mark Brown Nov. 29, 2022, 9:59 p.m. UTC

This series contains a few improvements to fp-stress performance, only
noticable on emulated platforms which both run more slowly and are
stressed far more by fp-stress due to supporting more VLs for SVE and
SME.  The bulk of the improvement comes from the first patch which
reduces the amount of time the main fp-stress executable is swamped by
load from the child processes during startup, the other two patches are
much more marginal.

v2:
 - Rebase onto arm64/for-next/selftests

Mark Brown (3):
  kselftest/arm64: Hold fp-stress children until they're all spawned
  kselftest/arm64: Don't drain output while spawning children
  kselftest/arm64: Allow epoll_wait() to return more than one result

 tools/testing/selftests/arm64/fp/fp-stress.c | 74 +++++++++++++++-----
 1 file changed, 57 insertions(+), 17 deletions(-)


base-commit: 642978981ec8a79da00828c696c58b3732b993a6

Comments

Will Deacon Dec. 2, 2022, 11:17 a.m. UTC | #1

On Tue, 29 Nov 2022 21:59:22 +0000, Mark Brown wrote:
> This series contains a few improvements to fp-stress performance, only
> noticable on emulated platforms which both run more slowly and are
> stressed far more by fp-stress due to supporting more VLs for SVE and
> SME.  The bulk of the improvement comes from the first patch which
> reduces the amount of time the main fp-stress executable is swamped by
> load from the child processes during startup, the other two patches are
> much more marginal.
> 
> [...]

Applied to arm64 (for-next/selftests), thanks!

[1/3] kselftest/arm64: Hold fp-stress children until they're all spawned
      https://git.kernel.org/arm64/c/98102a2cb786
[2/3] kselftest/arm64: Don't drain output while spawning children
      https://git.kernel.org/arm64/c/92145d88ce0b
[3/3] kselftest/arm64: Allow epoll_wait() to return more than one result
      https://git.kernel.org/arm64/c/c4e8720f2eb0

Cheers,