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Groups > linux.debian.kernel > #80636

Re: CONFIG_PREEMPT_DYNAMIC=y?

From Emanuele Rocca <ema@debian.org>
Newsgroups linux.debian.kernel
Subject Re: CONFIG_PREEMPT_DYNAMIC=y?
Date 2023-10-10 12:40 +0200
Message-ID <HnijD-eQDD-1@gated-at.bofh.it> (permalink)
References <HmEPf-eqdx-7@gated-at.bofh.it> <HmFLj-eqM9-7@gated-at.bofh.it> <HnhQB-eQol-7@gated-at.bofh.it> <Hni0h-eQuf-1@gated-at.bofh.it>
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Hello Johannes,

On 2023-10-10 12:14, Johannes Schauer Marin Rodrigues wrote:
> Quoting Emanuele Rocca (2023-10-10 12:10:07)
> > Setting CONFIG_HAVE_PREEMPT_DYNAMIC=y on arm64 is likely safe for us too, but
> > we may want to run some benchmark first to see if there are any noticeable
> > slowdowns.
> 
> I have a couple of arm64 boards here that I can run benchmarks on. What would
> you recommend to run to test the effect of CONFIG_HAVE_PREEMPT_DYNAMIC=y?

I'm not sure what the best benchmark would be, but maybe you could start
with something generic like timing a kernel build with and without
PREEMPT_DYNAMIC and throwing 'hey' at your favorite web server?
https://github.com/rakyll/hey

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Thread

CONFIG_PREEMPT_DYNAMIC=y? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2023-10-08 18:30 +0200
  Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-08 19:30 +0200
    Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-10 12:10 +0200
      Re: CONFIG_PREEMPT_DYNAMIC=y? Johannes Schauer Marin Rodrigues <josch@debian.org> - 2023-10-10 12:20 +0200
        Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-10 12:40 +0200
          Re: CONFIG_PREEMPT_DYNAMIC=y? Marc Haber <mh+debian-kernel@zugschlus.de> - 2023-10-10 15:50 +0200
      Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-10 14:00 +0200
        Re: CONFIG_PREEMPT_DYNAMIC=y? Vincent Blut <vincent.debian@free.fr> - 2023-10-10 14:20 +0200
          Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-10 15:20 +0200
        Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-10 15:00 +0200
          Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-10 23:30 +0200
            Re: CONFIG_PREEMPT_DYNAMIC=y? Diederik de Haas <didi.debian@cknow.org> - 2023-10-17 20:00 +0200
  Re: CONFIG_PREEMPT_DYNAMIC=y? Emanuele Rocca <ema@debian.org> - 2023-10-20 20:40 +0200

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