[mythtv-users] Questions about remote frontend...

MegaDeTH megadeth at reefs.org
Fri Jul 11 15:07:59 EDT 2003


Drivers for X I would suspect, there's only a few things that'll push up 
CPU usage when decoding, and your cpu is pretty high.

For reference, a 733mhz celeron with 64mb shared memory plays 4-6mbps at 
25% usage average, I encode everything at 480x480 with a bitrate of 
4.5mb - 6.5mb

With files encoded in divx, it only uses 10 % cpu, running 2.4.21 with 
latency & preempt patches, windows manager is blackbox

 From top, playing a mkvideo (bitrate of 1.8mbs) converted div-x the 
xbox runs.....

36 processes: 34 sleeping, 2 running, 0 zombie, 0 stopped
CPU states:   8.6% user,   2.4% system,   0.0% nice,  89.0% idle
Mem:     58296K total,    56972K used,     1324K free,     1300K buffers
Swap:   262136K total,    13796K used,   248340K free,    20140K cached
                                                                                

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
  581 root      13 -11 38492  13M  4308 S <   4.5 23.7   0:08 XFree86
  623 root      16   0 13628  13M  5132 R     4.3 23.3   0:05 mplayer
  622 root      10   0   940  940   748 R     0.1  1.6   0:00 top

And here's a mpeg2 recorded show on the xbox ..

 14:04:14 up 10 min,  1 user,  load average: 0.12, 0.13, 0.07
39 processes: 37 sleeping, 2 running, 0 zombie, 0 stopped
CPU states:  27.7% user,   3.0% system,   0.0% nice,  69.3% idle
Mem:     58296K total,    56836K used,     1460K free,      784K buffers
Swap:   262136K total,    15008K used,   247128K free,    20476K cached
                                                                                

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
  627 root      20   0 34716  32M 17484 R    26.3 56.8   0:04 mythfrontend
  628 root       9   0 34716  32M 17484 S     1.7 56.8   0:00 mythfrontend
  611 root       9   0  1504 1268  1172 S     0.3  2.1   0:00 sshd





Calvin Gorriaran wrote:

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>Last night I setup my remote frontend. I figured that a 933mhz P3 w/ 768mb ram would be plenty
>enough. I was getting a lot of jitters and CPU usage was up to 70%. This is running across 100mbit 
>ethernet connection and Xv is working. Running Redhat 9.0 w/ kernel 2.4.21 and latest CVS of mythtv. 
>Any suggestions on what I could do to locate the bottleneck?
>
>
>Calvin
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