[mythtv-users] Performance issues with new hardware.
jon at sd-6.org
Sat Mar 17 19:46:37 UTC 2007
> David Murphy wrote:
>> Jon wrote:
>> However now no matter what I do cpu
>>> usage is peaked. Can anyone shed some light?
>> Are you using the Nvidia binary driver? If so, are you using
>> Option "UseEvents" "True" in the Device section of your xorg.conf?
>> Should look something like this:
>> Section "Device"
>> Identifier "Videocard0"
>> Driver "nvidia"
>> VendorName "Videocard vendor"
>> BoardName "nVidia Corporation C51 PCI Express Bridge"
>> Option "UseEvents" "True"
> I've not used that option. I will give it a try later and see what
> happens. I am booting of a live usb root, so literally nothing has
> changed except the motherboard. I wouldn't think the video card would
> be the issue unless there are performance issues with pci-e. I thought
> it might be the sound card. The new board has HDA audio which isn't
> well supported by linux yet. I put in a different sound card but it
> didn't make any difference.
OK, I've added UseEvents. I did gain about ~6% on my cpu. Not much but
I switched out motherboards again anyway. I then realized that I
removed agp=off from my commandline but still had NvAGP set in 1 in my
xorg.conf. I added agp=off back to my commandline and performance is
actually much better with the new board, approx. 35% cpu usage now.
Unfortunately it still locks up in the program guide, but not near as
often. It wouldn't be such a problem except that I have to restart the
backend because it still thinks the frontend is using the card. This
really bites if I have a recording going but want to watch something else.
>> This option dropped cpu use substantially but I'm still running out of
>> cycles playing HD mpeg-2 content w/ my Sempron 3400 running on an Asus
>> M2NPV-VM. I find this odd as I can play back the 1920x1080 HD version
>> of Elephant's Dream encoded w/ Xvid at 10Mbps w/ no problems. Initially
>> I assumed that should be much more demanding than 1080i Mpeg-2 but that
>> is not what I'm seeing here. I have similar problems using an Athlon X2
>> 3600 so I think there must be another issue in the mix here...drivers or
>> In any case I'd be interested to know your results if you have not yet
>> enabled the UseEvents option.
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