[mythtv-users] backend takes 100% CPU recording DVB-T
Chris Hubball
chris at hubball.org
Sun Apr 2 13:32:36 UTC 2006
>> Does anyone out there have a Nova-T running with a reasonable CPU
>> usage?
>>
> That definitely sounds odd - mythbackend runs at between 5-15% CPU usage
> when capturing a single stream (on an AMD Sempron at 1GHz in low power
> mode). I'd check whether you're doing commercial flagging (I've
> disabled this as I find it very inaccurate and it's quick enough to stick
> in cut points around the commercials later) as this'll add some load.
I've got all transcode and flagging options disabled. I've tried it
again today and this time the CPU load is lower, however it never drops
below 50% which is still too high. I'm running on a 1.2Ghz and playback
in software takes 50%, so I'm sure that if the backend was only taking
10% I'd easily be able to watch Live TV.
Here's the result from top - is there anything obviously wrong?
top - 14:24:57 up 3:16, 2 users, load average: 1.04, 0.73, 0.49
Tasks: 72 total, 1 running, 71 sleeping, 0 stopped, 0 zombie
Cpu(s): 60.9% us, 1.7% sy, 0.3% ni, 36.4% id, 0.0% wa, 0.3% hi, 0.3% si
Mem: 483120k total, 473344k used, 9776k free, 2876k buffers
Swap: 979924k total, 0k used, 979924k free, 257068k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2700 mythtv 16 0 178m 29m 11m S 57.4 6.2 1:03.70 mythbackend
2545 mythtv 15 0 84616 29m 16m S 3.6 6.2 6:36.28 firefox-bin
2721 root 10 -5 0 0 0 S 1.0 0.0 0:00.96 cx88[0] dvb
1550 root 15 0 1608 384 312 S 0.3 0.1 0:01.05 klogd
2104 mysql 15 0 46244 10m 4112 S 0.3 2.3 0:05.22 mysqld
2168 mythtv 15 0 0 0 0 S 0.3 0.0 0:24.98 kdvb-fe-0
Cheers,
Chris.
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