[v1,0/3] kselftest/arm64: fp-stress performance improvements

Message

Mark Brown Nov. 29, 2022, 12:03 a.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.

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: a711987490a1784c3e3fd6d752a63501c11eb80b

Comments

Will Deacon Nov. 29, 2022, 7:31 p.m. UTC | #1

On Tue, Nov 29, 2022 at 12:03:52AM +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.
> 
> 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(-)

These don't apply on top of for-next/selftests

Will