Date: Fri, 23 Jun 2006 21:29:20 +0400 From: Boris Samorodov <bsam@ipt.ru> To: Mikhail Teterin <mi+kde@aldan.algebra.com> Cc: x11@freebsd.org Subject: Re: gears vs. glxgears; i915 for Linux binaries? Message-ID: <83238575@srv.sem.ipt.ru> In-Reply-To: <200606231317.21964@aldan> (Mikhail Teterin's message of "Fri, 23 Jun 2006 13:17:21 -0400") References: <200606231317.21964@aldan>
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On Fri, 23 Jun 2006 13:17:21 -0400 Mikhail Teterin wrote:
> First of all, allow me to thank you for the working DRI on my laptop with i915
> chipset. Although none of my Radeon desktops work yet, this is very welcome
> progress.
> After installing the linux_dri port, I wanted to compare the simple (glx)gears
> results between the Linux and the native binaries.
> The /compat/linux/usr/X11R6/bin/gears appears to be the same beast, as the
> ${X11BASE]/bin/glxgears installed by the native Xorg port.
> Running the Linux gears seemed VERY fast -- they were spinning like crazy but
> the program reports just 1800 frames per 5 seconds -- around 380 FPS (all for
> the default small window).
> Running the native glxgears appeared much slower, but the reported stats were
> ~2.5 times higher -- around 950 FPS.
> Now, the reported speed difference is, likely, due to the fact, that the
> linux_dri does not (yet?) install the i915_dri.so, so no DRI is (yet?)
> possible for Linux programs on my laptop. But why does it *appear* to be
> faster?
It's an optical effect. Haven't you ever see a wheel (a car or
bicycle) which *seems* to spin the wrong direction? It's the same
here. ;-)
WBR
--
Boris B. Samorodov, Research Engineer
InPharmTech Co, http://www.ipt.ru
Telephone & Internet Service Provider
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