Re: [OE-core] [PATCH] rust: Enable parallel-frontend-threads

[Richard Purdie <richard.purdie@linuxfoundation.org>]

On Thu, 2026-03-12 at 10:02 +0100, Alexander Kanavin via lists.openembedded.org wrote:
> On Thu, 12 Mar 2026 at 05:07, Sundeep KOKKONDA via
> lists.openembedded.org
> <sundeep.kokkonda=windriver.com@lists.openembedded.org> wrote:
> > Test Results:
> > A few tests ran by, with and without enabling this option.
> > - Avg. default build time (w/o this option) - 56m 50.104s
> > - Avg. build time with this option - 49m 17.224s
> > - Performance Difference - 7m 32.880s faster builds (≈ 13.3%)
> > 
> > Tests were performed by setting thread count as 8 & 16 but no much difference is seen.
> > So, the parallel-frontend-threads = 8 is set.
> 
> It would really help to provide specifics. What tests did you run, and
> how were the numbers obtained? How can these tests be reproduced? What
> CPU was used and how many cores it had?
> 
> > +    config.set("rust", "parallel-frontend-threads", "8")
> 
> I'd suggest we don't hardcode a number, but rather set to oe.utils.cpu_count()
> (grep oe-core for examples).

oe.utils.parallel_make() might make more sense here?

Cheers,

Richard