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From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Sun, 6 May 2018 18:01:28 +0000
Message-ID: <CAM2RGhSPCCi+g9VxJVtjWTiLbJ9EBeGSkAZ8SPcN=L5jz-zQTg@mail.gmail.com>
Subject: Re: Odp: Re: [geda-user] Opengl PCB and mainline PCB - pcb-rnd aspects
To: gEDA users mailing list <geda-user AT delorie DOT com>
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On Sun, May 6, 2018 at 8:38 AM, michalwd1979 (michalwd1979 AT o2 DOT pl) [via
geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
> Hello Evan, Hello Igor,

Hi Michael,

> The PC is lenovo T400 laptop with ATI Radeon HD 7350 card (card plugged to
> advanced dock PCIE x1 slot) + 2 screens. Graphics chip uses CEDAR microcode,
> and r600 open source X driver.

Ok cool. I was thinking you might not have gotten the microcode loaded
or something.

> According to logs everything related to DRM/DRI2/VDPAU is initialized
> properly.
> Glxgears runs at 60FPS (synced with screen refresh rate) and stays there
> even when spread on both screens with unnoticeable CPU load - seems right.
>
> Glxinfo says:
> direct rendering: Yes
> server glx vendor string: SGI
> server glx version string: 1.4
> Extended renderer info (GLX_MESA_query_renderer):
>     Vendor: X.Org (0x1002)
>     Device: AMD CEDAR (DRM 2.49.0 / 4.9.76-gentoo-r1-mw, LLVM 5.0.1)
> (0x68fa)
>     Version: 17.3.8
>     Accelerated: yes

Yep.. Your install looks good.

>     Video memory: 1024MB
>     Unified memory: no
>     Preferred profile: core (0x1)
>     Max core profile version: 3.3
>     Max compat profile version: 3.0
>     Max GLES1 profile version: 1.1
>     Max GLES[23] profile version: 3.0
> OpenGL vendor string: X.Org
> OpenGL renderer string: AMD CEDAR (DRM 2.49.0 / 4.9.76-gentoo-r1-mw, LLVM
> 5.0.1)
> OpenGL core profile version string: 3.3 (Core Profile) Mesa 17.3.8
> OpenGL core profile shading language version string: 3.30
> OpenGL core profile context flags: (none)
> OpenGL core profile profile mask: core profile
>
> In fact I was surprised that so old PC+graphics can work so well with
> transparent windows, movies, gschem, FreeCAD or animated waveforms in
> matplotlib. It was also really fast with opengl pcb, it is possible to work
> with boards spread on both screens without any noticeable delays in
> rendering.

Hardware shading makes a world of difference on that stuff. FreeCAD's
use of opengl like ours is nothing compared to say a high end fps
game.

> In pcb-rnd switching GUI to gtk2_gdk makes it a bit slower, but not much
> (thanks Igor for info about GUI, I recompiled pcb-rnd and used --gui
> gtk2_gl/gdk). Turing grid on/off also makes a difference, but still it takes
>>10 seconds do move a cursor. Turing thin drawing mode ON (polygons thin
> draw was ON already) speeds it up drastically, but still it is slower then
> opengl version (without thin draw). Now moving cursor takes ~1s or a bit
> more. I also noticed that the speed drops "exponentially" as the complexity
> of the board increases, but it seems that this is the case with all pcb
> versions (for mainline or opengl I don't have complex enough board to test
> it further).
>
> I also tried these tests on lenovo T400 with internal i965 graphics card and
> integrated screen - very similar results. The laptop is configured as
> before, only graphics drivers are different. If You need some more info or
> want the board I used for tests then please let me know.

Ok everything looks good. I don't have an experiance with graphics
switching and ATI cards. I have a macbook with nvidia/intel but mac
graphics switching is done differently than any other platform as I
understand it. (gmux)

> Best Regards,
> Michael Widlok

Thanks
Evan

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