[mythtv-users] Dual Tuner CPU Scaling

[Andy Kuan]

Maybe you've run out of physical RAM and you're starting to hit swap 
space? That could certainly cause a non-linear increase in CPU utilization.

Kyle E Wenda wrote:

>I have noticed that when performing one recording, my P4/1.8 dual-bttv
>machine will run at about 35% CPU load with MPEG4 encoding.  When
>performing two recordings, you would expect the load to be 70% or so,
>but it is not - it is pegged at about 98%.  A couple of frames from each
>recording are dropped per minute, but it's hardly noticeable.  My
>question is, why doesn't this scale like you would expect it to?  I was
>thinking I might be able to jam 3 cards into the machine, if the
>recordings scaled properly.
>
>See system stats here:
>http://dsl.kylewenda.com/stats/mrtg/blaster-stats.html  Blue line
>represents CPU load as a percentage, and fill color represents amount of
>free video storage space as a percentage.  
>  
>
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