[mythtv-users] HD Woes (so close to working, dual-channel RAM question)

Brian Wood beww at beww.org
Sat Feb 3 16:27:31 UTC 2007


On Feb 3, 2007, at 8:52 AM, Nate Crosno wrote:

>
> OK, thanks for the input. My searches returned lots of conflicting  
> information.
> Some claiming nothing and some claiming the moon.

The ones claiming the moon are probably either gamers or folks  
selling RAM.
>
> I'm using this board with Nnidia chipset:
> JetWay J939GT3-PTD Socket 939 NVIDIA GeForce 6100 Micro ATX AMD
>     http://www.newegg.com/Product/Product.asp?item=N82E16813153047

That link doesn't show that particular board, might be obsolete by  
now. I suspect from  the numbering scheme that you have an nForce3  
chipset though, which should be OK. The Jetway boards are not the  
best but are certainly a bargain for the $$$.
>
>
>> Sounds like you know to have your Gentoo USE flags set to take
>> advantage of SMP and threading.
>
> I do not have it set specifically for Mythtv, but it is enabled for  
> the kernel.

Make sure "threads" is in your USE= line in your /etc/make.conf then  
do an "emerge uDN world" which will re-compile anything that can take  
advantage of threading, like libraries, ffmpeg, qt etc.
>
>>
>> Also check the obvious stuff like making sure you don't have anything
>> unnecessary running, you might also try a minimal X server, if you're
>> running something like KDE it can take up a lot more CPU than a
>> stripped down X server will.
>
> I'm running blackbox.  While watching some 1080i content,  
> mythfrontend was
> taking over 100% cpu on one core while X was running 10-15% on the  
> other.
>

Well that's a decent miminalist X server. You might check your V-Sync  
settings in your nVidia server settings (disable "sync to vblank")  
and the Myth F/E sync settings, that can increase CPU a lot but it  
depends on a lot of things.

I'd still think about O/Cing if the mobo alows it.


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