[mythtv-users] Help Diskless frontend

[Alberto Alonso]

I'd be surprised if the fstab has anything to do
with this.

Memory usage as reported by "free" is not what you
need to look at. Monitor per process usage via
top and look at the RES and SHR columns.

Did you look at xbox specific settings? I would look
at audio buffering, acceleration, resolution, etc. in
that order.

Hope this helps,

Alberto

On Fri, 2005-11-04 at 21:03 -0800, Ben Dash wrote:
> Could someone please share their fstab for their
> diskless frontend that is working?
> 
> I found that my diskless xBox is stuttering a little
> although CPU usage is only ~50%.  The 766mhz PIII
> PVR250 backend is fine, and is able to broadcast
> stutter free to my wife's 1Ghz PIII with only 0.3% CPU
> usage while the xBox continues to stutter.
> 
> Since the CPU usage is relatively low on the xBox I am
> wondering if the problem could be the MFS root mount:
> 
> xbox ~ # cat /etc/fstab
> # <fs>                  <mountpoint>    <type>        
>  <opts>          <dump/pass>
> 192.168.0.1:/mnt/data/xbox      /               nfs   
>          rw,sync,hard,intr,nolock,nfsvers=2           
>   0 0
> /dev/hda50              /mnt/fatx/E     fatx          
>  defaults        0 0
> /mnt/fatx/E/linuxswap           none            swap  
>          sw             0 0
> /dev/cdroms/cdrom0      /mnt/cdrom      iso9660       
>  noauto,ro       0 0
> proc                    /proc           proc          
>  defaults        0 0
> 
> #network nfs volumes
> 192.168.0.1:/mnt/data/music     /mnt/music      nfs   
>  noauto,ro,users,nolock,nfsvers=2        0 0
> 
> I notice that the memory usage is close to full, at
> 118MB or 122MB.  It seems like there are several big
> mythfrontend processes:
> 
> xbox ~ # ps -ef |grep myth
> root      6252     1  0 16:56 ?        00:00:00 login
> -- mythtv
> mythtv    6258  6252  0 16:56 tty1     00:00:00 -bash
> mythtv    6265  6258  0 16:56 tty1     00:00:00
> /bin/sh /usr/bin/startx
> mythtv    6278  6265  0 16:56 tty1     00:00:00 xinit
> /home/mythtv/.xinitrc -- -nolisten tcp -br
> -deferglyphs 16
> mythtv    6281  6278  0 16:56 tty1     00:00:00 xclock
> -digital -padding 2 -g -0+0
> mythtv    6284  6281  0 16:56 tty1     00:00:00
> /usr/bin/evilwm -snap 6 -bw 0
> mythtv    6289  6281  0 16:56 tty1     00:03:06
> mythfrontend
> mythtv    6290  6289  0 16:57 tty1     00:00:00
> mythfrontend
> mythtv    6291  6290  0 16:57 tty1     00:00:00
> mythfrontend
> mythtv    6745  6290  0 21:30 tty1     00:00:05
> mythfrontend
> mythtv    6746  6290 34 21:30 tty1     00:29:46
> mythfrontend
> mythtv    6747  6290  1 21:30 tty1     00:00:58
> mythfrontend
> mythtv    6749  6290  0 21:30 tty1     00:00:12
> mythfrontend
> mythtv    6750  6290  0 21:30 tty1     00:00:35
> mythfrontend
> root      6751  6201  0 21:37 ?        00:00:00 sshd:
> mythtv [priv]
> mythtv    6754  6751  0 21:37 ?        00:00:00 sshd:
> mythtv at pts/0
> mythtv    6755  6754  0 21:37 pts/0    00:00:00 -bash
> root      6891  6778  0 22:55 pts/0    00:00:00 grep
> myth
> 
> I'm guessing that the reason why there are so many
> instances of mythfrontend is because the system is
> using heavy weight threads.  Would I improve things by
> going to NPTL?
> 
> Please let me know if you have any ideas, I'm going to
> let lirc wait for now while I get the picture stutter
> free, the wife is not quite as happy as I was hoping
> :-(
> 
> I'm using a 2.6.12.5 kernel and mythTV 0.18.1-r1
> 
> Thanks!
> 
> Ben
> 
> 
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