[mythtv-users] PUNDIT High-CPU watching TV - Fixed

[Paul Volkaerts]

Attached.  I have quite a good CPU (P4 2.6G with 512M memory).  Its also
worth tweaking some of the BIOS settings for shared memory size etc, that
made a small but noticeable difference to the performance.  Two tools worth
checking out are "x11perf -shmput500" and "xvtest".

I now get x11perf showing 262 repetitions/second and xvtest showing 2100
fps.

Paul

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org]On Behalf Of hpoley at dds.nl
Sent: 15 February 2004 21:03
To: Discussion about mythtv
Subject: RE: [mythtv-users] PUNDIT High-CPU watching TV - Fixed


Citeren Paul Volkaerts <paul.volkaerts at lineone.net>:
> From: mythtv-users-bounces at mythtv.org
>> Paul Volkaerts wrote:
>>> Just for reference, I fixed the high-CPU problem; or should I say Thomas
>>> Winischhofer did!
>>>
>>> Enabling MTRR in the kernel took the CPU used by XFree86 down from 50%
to
>>> less than 1% whilst watching recordings.
>>
>> What is MTRR and how did you enable it?
>
> Enable it my building the kernel with the option in.
>
> So: run make menuconfig to configure your linux kernel and under
"Processor
> Type" there is an option called MTRR (Memory Type Range Register); which
> defaults to OFF at least on Debian installs.
>
> Hitting HELP here defines MTRR as ... "allows bus transfers to be combined
> into a large transfer before bursting over the PCI/AGP bus".

I've got MTRRs enabled. So could you give some more hints? I've also got a
Pundit, but X runs at 7-8% (@ 720x576). Which seemed good to me, but now I
think
it might explain the slight playback problems I have.

Maybe you could mail your XF86Config and kernel .config?

   Henk Poley <><
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