[mythtv-users] Quick opinions

Bill Williamson bill at bbqninja.com
Wed Jun 3 04:03:55 UTC 2009


On Wed, Jun 3, 2009 at 1:04 PM, Alan Marchiori <alan at alanmarian.com> wrote:

> On Mon, Jun 1, 2009 at 9:46 PM, Alan Marchiori <alan at alanmarian.com>
> wrote:
> > OK, ran into issues, but I have to stop playing for now.
>
>
> Update....  a very interesting result.  I looked at /proc/cpuinfo and
> it reported my CPU as 1GHz (should be 2.6GHz).  I did some searching
> around and installed the cpufrequtils ubuntu package.  cpufreq-info
> also reported 1GHz even while playing the h264 file.  I played around
> with the different governors and only performance put the reported cpu
> freq up to 2.6GHz.
>
> Bottom line is with the CPU at 2.6GHz the clip played fine with
> perfect audio sync and 35%-40% cpu load.
>
> I have a mostly stock mythubuntu 9.04 system.  Not sure why default it
> clocks the CPU so low.?
>

Because if you're not using it, it's fine to be slow as it uses less energy
and generates less heat (and thus less fan noise).

VDPAU has caused a funny and new issue:  You need bus and memory bandwidth,
but not cpu power.  The governors do not have any way to detect this, so
they simply see "5% cpu? No need to clock up!".
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