Re: s390x builder outage

On Sat, Aug 15, 2026 at 11:58 AM Florian Weimer via devel
<[email protected]> wrote:
>

(snip)

> Don't the numbers show that most builds are blocked on ppc64le?
>

... yes, but:

>
> The s390x-induced delays are higher, but the total number of
> bottlenecked builds is much smaller.  Only 8.4% of the builds are
> blocked on s390x.

From what I can tell, the problems are worst during "bursty"
workloads, i.e. a bunch of builds running at the same time.

When there are idle builders available, then ppc64le builders appear
to be slightly slower than s390x.
But when all s390x builders are busy, they become the bottleneck, both
in terms of wait time (time until a build is assigned to an s390x
builder) *and* build time (more builds running on the same hardware?).

Fabio
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