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Re: [PATCH v2 2/2] ci: align job counts across CI providers

From
Patrick Steinhardt <ps@pks.im>
Date
Sep 28, 2026, 11:14 UTC
Message-ID
<arpMJ4EBomeSF6LS@pks.im>
In-Reply-To
<CAJ-ks9mWU2cFWLfioSSM_6Ct1ydtxn3i4Dh-L537M5EDiMW3vQ@mail.gmail.com>
On Mon, Sep 28, 2026 at 06:16:33AM -0400, Tamir Duberstein wrote:
Show 15 quoted lines
> On Mon, Sep 28, 2026 at 2:36 AM Patrick Steinhardt <ps@pks.im> wrote:
> >
> > On Fri, Sep 25, 2026 at 12:35:39PM -0400, Tamir Duberstein wrote:
> > > GitHub Actions sets JOBS to ten regardless of runner size, while
> > > GitLab CI uses the detected CPU count. Use the CPU count for Make and
> > > prove on both providers, selecting JOBS after the operating system
> > > is identified.
> >
> > Again, it should be noted here what the effect of this is. In other
> > words, does GitHub slow down as a result? You already showed numbers
> > during the discussion on v1 of this series, and these numbers should
> > probably be included in this message, too.
> 
> Agreed, but in this case there was no reliable performance change
> across 10 runs; I could include that.

I think it should be included, as it's the one thing that people will be wondering about when they see this change.

Patrick
Previous: Tamir DubersteinNext: Tamir Duberstein
Message 18 of 25 in “ci: reduce pressure from large test fixtures”
  1. 0/2 ci: reduce pressure from large test fixturesTamir Duberstein, Sep 23, 2026
  2. 1/2 t4205: compare huge output without diffTamir Duberstein, Sep 23, 2026
  3. Patrick SteinhardtSep 24, 2026
  4. Tamir DubersteinSep 24, 2026
  5. Jeff KingSep 25, 2026
  6. Junio C HamanoSep 25, 2026
  7. Patrick SteinhardtSep 28, 2026
  8. 2/2 ci: match Linux jobs to available CPUsTamir Duberstein, Sep 23, 2026
  9. Patrick SteinhardtSep 24, 2026
  10. Tamir DubersteinSep 25, 2026
  11. Tamir DubersteinSep 23, 2026
  12. 0/2 ci: use cmp and align job-count selectionTamir Duberstein, Sep 25, 2026
  13. 1/2 t4205: compare huge output without diffTamir Duberstein, Sep 25, 2026
  14. Patrick SteinhardtSep 28, 2026
  15. 2/2 ci: align job counts across CI providersTamir Duberstein, Sep 25, 2026
  16. Patrick SteinhardtSep 28, 2026
  17. Tamir DubersteinSep 28, 2026
  18. Patrick SteinhardtSep 28, 2026
  19. 0/2 ci: use cmp and align job-count selectionTamir Duberstein, Sep 30, 2026
  20. 1/2 t4205: compare huge output without diffTamir Duberstein, Sep 30, 2026
  21. 2/2 ci: use twice the CPU count on both providersTamir Duberstein, Sep 30, 2026
  22. Patrick SteinhardtSep 30, 2026
  23. Patrick SteinhardtSep 30, 2026
  24. Tamir DubersteinSep 30, 2026
  25. Junio C HamanoSep 30, 2026

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