[mythtv] performance

mythtv-dev@snowman.net mythtv-dev@snowman.net
Wed, 18 Dec 2002 12:53:56 -0600

I echo your concerns about the non-aiw version of the Radeon.  I also have 
the Radeon 7500 (non-aiw) and
had the same question about gatos.  Right now myth works great for me 
except i do not see the program
guide when watching live-tv, it doesn't seem to overlay the video.

are the gatos drivers also for non-aiw Radeon cards and what are the 

"Kevin Bowen" <kevin@ucsd.edu>
Sent by: mythtv-dev-admin@snowman.net
12/18/2002 12:47 PM
Please respond to mythtv-dev

        To:     <mythtv-dev@snowman.net>
        Subject:        RE: [mythtv] performance

I don't know if that article applies to me, it seems specifc to via
chipsets... only mention of SBlive was giving it as an example of 
which didn't work right due to the via bug (unless I missed something, 
is entirely possible considering the navigation controls on that site are 
german ;)

I also run an sis735 board, with athlon xp1800+ and radeon 7500 (non-aiw)
and hauppauge wintv. This list was the first I'd ever heard of Gatos... I
googled for it and found the project homepage, but I'm a bit unclear on 
the purpose is... from the limited info available on the website, it 
like the main purpose of the project is to get vid4linux support (and
related tools) for radeon AIW cards... but both you and m0j0 mentioned
you're running the gatos drivers despite having non-AIW radeons... is 
supposed to be some performance benefit to this?

-----Original Message-----
From: mythtv-dev-admin@snowman.net
[mailto:mythtv-dev-admin@snowman.net]On Behalf Of Monty Walls
Sent: Wednesday, December 18, 2002 8:05 AM
To: mythtv-dev@snowman.net
Subject: Re: [mythtv] performance

On Tue, 17 Dec 2002 17:11:41 -0800
"Kevin Bowen" <kevin@ucsd.edu> wrote:

About SBLive(dma contention pig):  You might appreciate TecChannel's
discussion of the problem.
http://www.tecchannel.de/hardware/817/index.html.  One of things you notice
is that all the VIA motherboards at the time had serious dma performance
The same problem was also encountered by the Linux guy who does Iomega 
Serguei Miridonov <mirsev@cicese.mx> (search for vialatency & linux on

As far as performance on individual systems, I average about 85% (mpeg4) 
Leadtek 7350kda (SIS735) with 512mb of cas 2.5 ddr memory using a Athlon
XP2000.  Sound is a Hoontech Digital XG (YMF754), and disks are u2w scsi
on a symbios 8751?. TV-capture card is a Hauppauge WinTV stereo. Video is
an ATI Radeon 7500 using the Gatos XFree drivers + drm patches.

Even using on RTjpeg recording my old system with KT133 motherboard 
stutters at 640x480 (looks like memory or bus bandwidth issues).

-Monty Walls (mwalls@castor.oktax.state.ok.us)
-                MIS, Oklahoma Tax Commission
- My opinions are my own, my employer knows nothing about it.
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