[mythtv-users] diskless backend?

Sonni Nørløv mythtv-users at sluge.dk
Mon Oct 10 23:06:32 UTC 2005


Yes, that would be software decoding. Unless the nvidia fx5200 somehow 
is used to help out.
The frontend is doing something like this when watching live tv:

top - 12:57:27 up 7 min,  2 users,  load average: 0.93, 1.49, 0.81
Tasks: 114 total,   1 running, 113 sleeping,   0 stopped,   0 zombie
Cpu(s): 51.0% us,  4.5% sy,  0.0% ni, 40.3% id,  0.3% wa,  1.0% hi,  
2.9% si
Mem:    256344k total,   251232k used,     5112k free,        0k buffers
Swap:   199992k total,        0k used,   199992k free,    99284k cached

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
2206 root      15   0  166m  34m 156m S 14.0 13.9   0:45.15 X
2139 root      15   0     0    0    0 S  1.0  0.0   0:04.11 lirc_dev
2421 mythtv    15   0  147m  94m  66m S  0.3 37.6   0:57.96 mythfrontend
2539 mythtv    16   0  1948  992 1720 R  0.3  0.4   0:02.00 top
....
2511 mythtv    15   0 65632  19m  34m S  0.0  7.8   0:00.75 mythbackend

Look at the total cpu usage on the frontend as the process list does not 
seam to be completely correct.
When watching xvid movies and alike it run up to about 70-80% total cpu 
usage
.
The pvr250 has an mpeg2 encoder otherwise the P3 would not be strong enough.

As to network traffic, the system report somewhere around 1Mbyte in both 
directions when watching live tv. The gives no real load on the 24x4 
server, which by the way uses lvm striping over 2 disks, and is able to 
deliver 5-8Mbytes (writing-reading) over the network.

Live tv pause, does not load the system as much as live tv watching, as 
pause does not require reading from the live buffer.

// Sonni

Alberto Alonso wrote:

>Are you using software decoding on the P3 733Mhz? Can
>that setup handle live TV pause?
>
>I am thinking of having an old laptop with almost those
>specs to be one of my front ends.
>
>Thanks,
>
>Alberto
>  
>



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