linux-kernel - Re: Dhrystone -- userland version

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Message-ID: <CAMuHMdX-xpu-+8kAun90ZdYLe6kMzW3CEoD_hQtpwTPSJ8Tp1A@mail.gmail.com>
Date:   Mon, 9 Jan 2023 20:57:30 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Willy Tarreau <w@....eu>
Cc:     "Theodore Ts'o" <tytso@....edu>, Pavel Machek <pavel@....cz>,
        kernel list <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...l.org>
Subject: Re: Dhrystone -- userland version

Hi Willy,

On Mon, Jan 9, 2023 at 3:31 PM Willy Tarreau <w@....eu> wrote:
> Then maybe you'd rather use this:
>
>    https://github.com/wtarreau/mhz

> It's also what's used by sbc-bench to verify that CPU vendors are not
> cheating in the embedded world. It's very simple, and not arch-dependent
> nor compiler-dependent (at least as long as you don't build at -O0 :-)).

Gcc 4.1.2 (still the userspace compiler on a few of my old systems)
doesn't like the aligned() attribute on functions.
In glibc 2.3, LLONG_MAX is defined conditionally on __USE_ISOC99.

Apart from that, the result is fairly accurate. Nice job!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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