Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <Y7nyd4hPeXsdiibH@duo.ucw.cz> <Y7pRw47hidw+s6+g@mit.edu> <Y7pzbnlXgv+asekg@amd.ucw.cz>
In-Reply-To: <Y7pzbnlXgv+asekg@amd.ucw.cz>
From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Sun, 8 Jan 2023 10:58:53 +0100
Message-ID: <CAMuHMdVvVoEs8yjNLmK=_shmGkyz1zYc8ZMi-vmP4aee0yKoPQ@mail.gmail.com>
Subject: Re: Dhrystone -- userland version
To:     Pavel Machek <pavel@ucw.cz>
Cc:     "Theodore Ts'o" <tytso@mit.edu>,
        kernel list <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@osdl.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hi Pavel,

On Sun, Jan 8, 2023 at 8:40 AM Pavel Machek <pavel@ucw.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@glider.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?

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.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds