[mythtv-users] MYthTV Playback is Choppy

[Brian Schmidt]

Thank-you very much for looking things over. I'll double-check my hardware
tonight and see if I can make any improvements. I'll send an update of any
discoveries.

Thanks again,
Brian

On Wed, Apr 8, 2009 at 10:02 AM, Brian Wood <beww at beww.org> wrote:

>  On Tuesday 07 April 2009 21:18:49 Brian Schmidt wrote:
> > Here is the additional detail on the hardware:
> > AMD Athlon(tm) XP 2100+ (~1730MHz)
> > 256MB RAM
> > 10GB boot drive
> > 200GB video storage drive
> >
> > Installed packages:
> > mythtv-0.21-17.fc10.i386
> > mythtv-frontend-0.21-17.fc10.i386
> > kmod-nvidia-96xx-2.6.27.5-117.fc10.i686-96.43.11-1.fc10.1.i686
> > akmod-nvidia-96xx-96.43.11-1.fc10.1.i686
> > xorg-x11-drv-nvidia-96xx-96.43.11-1.fc10.i386
> > xorg-x11-drv-nvidia-96xx-libs-96.43.11-1.fc10.i386
> >
> >
> > `top` output without mythfrontend even running (top 4 processes on the
> > list):
> >
> > top - 23:11:25 up 48 min,  2 users,  load average: 1.20, 5.24, 5.29
> > Tasks: 135 total,   2 running, 132 sleeping,   0 stopped,   1 zombie
> > Cpu(s): 20.7%us,  1.7%sy,  0.0%ni, 76.0%id,  1.3%wa,  0.0%hi,  0.3%si,
> > 0.0%st
> > Mem:    221612k total,   192532k used,    29080k free,     1136k buffers
> > Swap:   524280k total,   222956k used,   301324k free,    53728k cached
> >
> >   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+
> > COMMAND
> >  3104 myth      20   0  194m  50m  11m S 11.6 23.4   1:50.86
> > firefox
> >  2467 root      20   0 85908  12m 2476 S  9.3  5.7   0:57.58
> > Xorg
> >  1441 root      15  -5     0    0    0 S  1.3  0.0   0:33.72
> > lirc_dev
> >  2317 root      20   0  213m 6448 2812 S  1.3  2.9   0:30.63 mythbackend
> >
> >
> > `top` output while trying to playback a recording (top 6 processes on the
> > list):
> >
> > top - 22:53:08 up 30 min,  2 users,  load average: 6.79, 4.93, 2.98
> > Tasks: 136 total,   1 running, 134 sleeping,   0 stopped,   1 zombie
> > Cpu(s):  3.7%us,  5.6%sy,  0.0%ni,  0.0%id, 89.7%wa,  0.3%hi,  0.7%si,
> > 0.0%st
> > Mem:    221612k total,   217580k used,     4032k free,      252k buffers
> > Swap:   524280k total,   312296k used,   211984k free,    69712k cached
> >
> >   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+
> > COMMAND
> >  2961 myth      20   0  159m 2024 1464 S  3.3  0.9   0:01.33
> > pulseaudio
> >  3211 myth      20   0  441m  78m  57m S  2.0 36.5   1:37.57
> > mythfrontend
> >  2467 root      20   0  201m 7828 3064 S  1.3  3.5   0:36.90
> > Xorg
> >  1441 root      15  -5     0    0    0 S  1.0  0.0   0:20.44
> > lirc_dev
> >   242 root      15  -5     0    0    0 S  0.7  0.0   0:02.85
> > kswapd0
> >  2317 root      20   0  213m 5476 1996 S  0.7  2.5   0:16.47 mythbackend
>
> Well you seem to need more RAM, as you're swapping a bit, and with 0% idle
> I'd
> say you are maxed out on CPU cycles.
>
> Looks like your CPU is spending  LOT of time waiting on I/O, I'd check your
> disk systems, make sure DMA is working, you are using a proper type of
> cable
> etc. etc. This is almost certainly your main problem.
>
> --
>  beww
> beww at beww.org
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>
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