Re: [PATCH 00/23] kbuild: significantly speed up kernel builds

[Lorenzo Stoakes (ARM)]

On Wed, Sep 09, 2026 at 02:58:59PM -0700, Florian Fainelli wrote:
> On 9/8/26 13:55, Lorenzo Stoakes (ARM) wrote:
> > A typical kernel build consists of a frustratingly large amount of time
> > spent stuck in single-threaded bottlenecks.
> >
> > It turns out that there's a lot we can do about this and doing so
> > significantly impacts kernel build times.
> >
> > This series makes allmodconfig builds up to 36% faster, incremental builds
> > up to ~70% faster, and noop builds up to ~90% faster.
> >
> > Builds are faster across the board on every device I tested.
> >
> > Machines used for perf testing:
> >
> > * Threadripper -   x86, AMD Threadripper 9980X, 64 cores, 128 threads
> > * EPYC         -   x86, 2 socket EPYC 9754, 256 cores, 512 threads
> > * M2           - arm64, 2022 M2 macbook pro, 8 cores, 8 threads
> >                          (4 perf, 4 efficiency)
>
> My AMD EPYC 9454P server shows an improvement in the order of 13% using the
> arm64's defconfig and make -j97. Thanks for doing this!

Nice thanks! Good to confirm others are seeing the benefits :)

> --
> Florian
>

--
Cheers, Lorenzo