[mythtv-users] tests: CPU load and capture size

[Dennis Lou]

From: mOjO <mOjOspam at thegeekclub.net>
>Dennis Lou wrote:
>>From: Ray Olszewski <ray at comarre.com>
>>>"live" TV at 320x240:   7-12% CPU "user" usage
>>>        backend: 2-8%
>>>        frontend: 2-4%
>>>        system: 2-5%
>>>
>>>"live" TV at 640x480:   99-100% CPU "user" usage
>>>        backend: 75%
>>>        frontend: 19%
>>>        system: 4%
>>
>>QVGA resolution is  150kB of YV12 data per frame
>>while
>>VGA resolution is 600kB.  That poor little Cel
1.7Ghz
>>only has 128kB of L2 cache.  Maybe you have a
>>memory bandwidth problem?
>
>However, i got very similar results with an Athlon XP
>1700 and 512MB of 
>PC2100 DDR... there was a huge cpu difference between
>640x480 and 
>320x240 and I have the memory/cpu bandwidth.

That's interesting, what chipset is on your
motherboard?

-Dennis

P.S. I goofed.  YV12 is 12 bits per pixel or 112KB
per video frame for QVGA.

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