[mythtv] HDTV CPU utilization
jeff at harmonyintegration.com
jeff at harmonyintegration.com
Wed Jan 19 12:53:34 EST 2005
>> That is not the experience of others. I have the same chip,
>> Hyperthreaded
>> P4-3ghz, and I typically show 60% idle -- without xvmc, and sometimes
>> with the kernel deinterlace on not a lot less.
>
> Thanks for the info about the deinterlacing and resizing.
>
> As far as CPU utilization I have been using top. Being that my system is
> hyperthreaded I'm pretty sure that top thinks that it has two real CPU's
> instead of a single hyperthreaded one. This is why it never reports a CPU
> utilization greater than 50%. I have been doubling the "us" value. So in
> this example:
>
> top - 08:44:47 up 30 days, 23:52, 1 user, load average: 0.03, 0.02, 0.00
> Tasks: 63 total, 1 running, 62 sleeping, 0 stopped, 0 zombie
> Cpu(s): 3.2% us, 1.9% sy, 0.0% ni, 94.9% id, 0.0% wa, 0.0% hi, 0.0%
> si
> Mem: 77644k total, 76884k used, 760k free, 31504k buffers
> Swap: 524152k total, 38196k used, 485956k free, 15084k cached
>
> I would say that I was really using 6.4% of my CPU. Is this the wrong
> approach to determining the true CPU utilization?
>
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Was this TOP run on your Myth box? If so I believe part of the problem is
your memory. 75Meg is not enough and your system is using swap. Not good
for video applications.
I have a P4 2.4 with 512Meg and a FX5200 using DVI. 1080i content plays
fine using XV. CPU utilization is about 90%.
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