linux-kernel - Re: Dhrystone -- userland version

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Message-ID: <Y7sPq3Tmm6vI/RAJ@duo.ucw.cz>
Date:   Sun, 8 Jan 2023 19:47:07 +0100
From:   Pavel Machek <pavel@....cz>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Theodore Ts'o <tytso@....edu>,
        kernel list <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...l.org>
Subject: Re: Dhrystone -- userland version

Hi!

> On Sun, Jan 8, 2023 at 8:40 AM Pavel Machek <pavel@....cz> wrote:
> > > > Distributions do not usually carry dhrystone, and I don't think anyone
> > > > really maintains it. It is useful tool, and it seems we'll maintain
> > > > it.
> > > >
> > > > I'd like to add enough glue so that it would be runnable from
> > > > userspace, too? Userland version is what is actually useful to me, and
> > > > it should not be hard.
> > >
> > > I don't see whatever message you were replying to, and it doesn't seem
> > > to be archived in lore[1], so I'm not sure about the context.  But you
> > > are talking about the Dhrystone benchmark[2], right?
> > >
> > > [1] https://lore.kernel.org/all/Y7nyd4hPeXsdiibH@duo.ucw.cz/T/#u
> > > [2] https://wiki.cdot.senecacollege.ca/wiki/Dhrystone_howto
> > >
> > > If so, I'm confused what you mean by "add enough glue so that it would
> > > be runnable from userspace" --- Dhrystone is a userspace benchmark,
> > > dating from the 1980's, although what it benchmarks is often more about
> > > the compiler than the CPU's performace.
> >
> > Yes, I'm talking about Dhrystone benchmark. We are carrying
> > kernel-only version in lib/dhry_*.c, it is in -next now.
> >
> > commit cfbd4cc940275240e97f8b922c8f18a44fe15c07
> > Author: Geert Uytterhoeven <geert+renesas@...der.be>
> > Date:   Thu Dec 8 15:31:28 2022 +0100
> >
> >     lib: add Dhrystone benchmark test
> >
> > I'd like userspace-too version, at the same place :-).
> 
> So you want to add some glue code to tools/testing/, for building a
> userspace version?

Yes, that would be the plan.

> However, as this is not Linux-specific, how hard can it be to convince
> your distro to include https://github.com/qris/dhrystone-deb.git?
> Usually, when I have a full userspace available, I just clone the above,
> and debuild it myself.

Dunno. I'd not solve it if package was in Debian, but it is not.

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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