[mythtv-users] Long delays with remote occasionally - lirc priority?

Andrew Allison andrew.allison at gmail.com
Mon Sep 8 15:25:49 UTC 2008


On Mon, 2008-09-08 at 10:32 -0400, Johnny Russ wrote:
>         I have been following this thread because every day or two the
>         machine will delay response to the commands for a minute or
>         two.  It will not respond to keyboard or remote and then
>         suddenly does a bunch of things.  Hard to say if it did
>         everything that was keyed as by that time I have hit so many
>         keys I can't remember them all.  Sometimes the remote misses
>         keys outright (probably a pointing issue) so I often have to
>         hit a key again.  It takes a while to figure out which issue
>         is active so lots of keys get hit.
>         
>         
>         I bring this up now because my machine is different than the
>         ones being discussed.  I have mythbunty 8.04 running on a AMD
>         5400+ CPU.  If this sounds like the same probably you are
>         chasing I think knowing my setup would be helpful.
>         
>         
> 
> I am also experiencing the exact same behavior. I am running on a
> lower powered machine with a PIII 1 GHz and 384 MB of RAM. I have
> always just attributed it to my machine being underpowered, but maybe
> something else is going on. When I am watching a recording and
> mythtv-status runs it causes the show to be choppy for 20 or 30
> seconds until mythtv-status is done. I haven't been able to check what
> was going on when the remote was slow to respond, but I assumed it was
> mythtv-status or something similar running in the background that was
> causing my remote to be delayed. 
> 

I got a pretty fast machine and it's occurring


One interesting stat is the lirc_dev process priority running as a 15
while the rest are at 20
I reniced the lirc process to 0
Could this have something to do with it?
I'll have to wait and see

Fedora 9
AMD 64 2 gig cpu
Standard Definition
1 gig ram


Iulius Theme
OpenGL paint engine
QTStyle Default
Font	Default
Menu	Default

top output while remote key presses are queuing


Tasks: 133 total,   2 running, 131 sleeping,   0 stopped,   0 zombie
Cpu(s): 30.0%us, 68.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.7%hi,  1.3%si,
0.0%st
Mem:   1027388k total,  1016876k used,    10512k free,    26456k buffers
Swap:   514072k total,     4200k used,   509872k free,   380064k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
30180 root      20   0  184m  91m  22m R 74.5  9.1 236:07.18 X
30679 mythtv    20   0  781m 140m  46m S 23.6 14.0 146:43.78
mythfrontend
 1553 root      15  -5     0    0    0 S  1.0  0.0  50:46.89 lirc_dev
30475 mythtv    20   0  221m 4276 3232 S  0.3  0.4   0:14.50 pulseaudio
30515 mythtv    20   0  453m  20m  11m S  0.3  2.0   3:09.67 knotify4
    1 root      20   0  4048  836  588 S  0.0  0.1   0:01.54 init
    2 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kthreadd
   
top while working normal

 Tasks: 135 total,   1 running, 134 sleeping,   0 stopped,   0 zombie
Cpu(s): 31.0%us, 62.0%sy,  0.0%ni,  4.0%id,  1.3%wa,  0.7%hi,  1.0%si,
0.0%st
Mem:   1027388k total,  1017808k used,     9580k free,     1656k buffers
Swap:   514072k total,     4176k used,   509896k free,   490684k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
30180 root      20   0  184m  91m  22m S 67.9  9.1 245:06.67 X
30679 mythtv    20   0  782m 141m  46m S 24.9 14.1 150:38.36
mythfrontend
 1553 root      20   0     0    0    0 S  1.0  0.0  50:54.59 lirc_dev
17552 root      20   0 14844 1128  852 R  0.3  0.1   0:00.25 top
    1 root      20   0  4048  836  588 S  0.0  0.1   0:01.54 init
    2 root      15  -5     0    0    0 S  0.0  0.0   0:00.00 kthreadd
    



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