[mythtv] HDTV CPU utilization

[Brad Templeton]

On Wed, Jan 19, 2005 at 08:31:21PM -0600, Chris Mumford wrote:
> 
> > While top is running hit "1".  That will cause top to show individual
> > tallies for each CPU.
> 
> Yes, I have done that, but then it just prints out numbers like this:
> 
> top - 19:58:47 up 9 min,  3 users,  load average: 1.11, 0.80, 0.38
> Tasks:  95 total,   3 running,  92 sleeping,   0 stopped,   0 zombie
>  Cpu0 : 56.1% us,  4.1% sy,  0.0% ni, 39.6% id,  0.1% wa,  0.1% hi,  0.0% si
>  Cpu1 : 38.2% us,  2.1% sy,  0.0% ni, 59.6% id,  0.0% wa,  0.1% hi,  0.0% si
> Mem:    513924k total,   361384k used,   152540k free,    34876k buffers
> Swap:   522104k total,        0k used,   522104k free,   212904k cached
> 
> I still have to add up the columns 56.1% + 38.2% + 4.1% + 2.1% = 100.5%
> which makes sense since the best synthetic hyperthreading improvement was
> 7%.
> 
> I'm wondering how the people that have posted their CPU utilization have
> measured this. I wonder if maybe they are also being fooled into thinking
> that top is reporting the CPU utilization correctly???

Try mpstat instead, or "mpstat -P ALL 2" or something like that.

Mine reports both "CPUs" about 50% utilized and total average thus also
around that figure.  P4-prescott, 512k cache.