[mythtv-users] performance on Via cpu when watching live tv

Frank Van Damme frank.vandamme at gmail.com
Sat Jan 3 21:40:15 UTC 2009


I finally got mythtv working (with a dvb card). Not an easy ride it was.

I'm still trying to smooth the setup of this, for instance, watching
live tv is slow. I don't know why - playing normal on-disc movies goes
smoothly. I wath tv via a dvb tuner, which works OK with pure mplayer
or xine. In mythtv however, both audio and video pauses every few
seconds and cpu usage is constantly 100 %:

top - 22:04:25 up  5:04,  2 users,  load average: 4.54, 3.08, 1.84
Tasks: 100 total,   3 running,  96 sleeping,   1 stopped,   0 zombie
Cpu(s): 81.4%us, 11.8%sy,  0.7%ni,  0.0%id,  0.0%wa,  5.9%hi,  0.3%si,  0.0%st
Mem:    449904k total,   443960k used,     5944k free,     2988k buffers
Swap:  4088500k total,   127332k used,  3961168k free,   133928k cached

13036 freevox   20   0  316m  80m  41m S 53.1 18.4   4:18.59
4361 root      19  -1  257m  58m  21m R 37.1 13.3  19:27.81 X
13011 mythtv    20   0  220m  23m 8308 S  6.2  5.4   0:30.34

As you can see, I also run my backend on this machine but it doesn't
use so much cpu time... I don't think this system is too slow for a
mythtv frontend?

processor	: 0
vendor_id	: CentaurHauls
cpu family	: 6
model		: 9
model name	: VIA Nehemiah
stepping	: 8
cpu MHz		: 1330.000
cache size	: 64 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 1
wp		: yes
flags		: fpu vme de pse tsc msr cx8 sep mtrr pge cmov pat mmx fxsr sse
up rng rng_en ace ace_en
bogomips	: 2666.69
clflush size	: 32
power management:

The distro is a Mandriva 2009.

P.S. Happy new year and to those who develop Mythtv: thank you! It's a
hard nut to crack configuration-wise, but what a powerhouse!

Frank Van Damme

"Anyone can sit down and write some boring artistic song. Pop music is
the hardest shit to write."

- Britney Spears.

More information about the mythtv-users mailing list