On Fri, Mar 07, 2025 at 05:30:34PM +0100, Kirill A. Korinsky wrote:

> On Tue, 04 Mar 2025 14:25:44 +0100,
> Martin Pieuchot <mpi@grenadille.net> wrote:
> > 
> > Diff below includes all the changes I made during the last months to get
> > rid of lock contention and enable parallel fault handling.
> > 
> > With it I measured a 5% performance improvement and a reduction of %sys
> > time of 25% on 24CPU amd64.  On my 80CPU arm64 performances also improve
> > by 5% and %sys time increase by ~5%.
> > 
> > I'd be happy to hear about more tests, especially on bulk builds and on
> > other architectures.
> >
> 
> I need to rebuild chromium, so I don't mind to do it twice to test the diff
> on arm64 as well.
> 
> Without your diff:
> 
>   444m02.18s real  3014m28.87s user  1859m28.53s system
> 
> With your diff:
> 
>   427m18.89s real  3042m22.61s user  1687m28.27s system
> 
> Differences:
>  - real time is decreased for about 3%
>  - user time is decreased for about 1%

The numbers show a (small) increase of user time.

>  - system time is decreased for about 10%
> 
> I had built it as: make clean; make patch; time make MAKE_JOBS=1
> 
> No crash, deadlock or any issue during that test.
> 
> -- 
> wbr, Kirill
>