linux-kernel - Re: Dhrystone -- userland version

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Date:   Sun, 8 Jan 2023 08:40:30 +0100
From:   Pavel Machek <pavel@....cz>
To:     Theodore Ts'o <tytso@....edu>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        geert+renesas@...der.be, Andrew Morton <akpm@...l.org>
Subject: Re: Dhrystone -- userland version

Hi!

> > 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 :-).

Best regards,
								Pavel

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

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