[mythtv-users] Performance issues with new hardware.
mikep at randomtraveller.org.uk
Sat Mar 17 21:29:22 UTC 2007
> Jon wrote:
>> 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.
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>> mythtv-users mailing list
>> mythtv-users at mythtv.org
> mythtv-users mailing list
> mythtv-users at mythtv.org
You mention "locks up" in the program guide. Can you be more specific?
Reason I ask is that under certain conditions (which I have not yet been
able to identify), once in the program guide, I can wait one minute (60
seconds) for keypresses to be acted upon. Then of course it does that
and the next 5 keypresses I made before I realised what was happening.
Have you actually waited that long to see if anything happens?
More information about the mythtv-users