[mythtv-users] Live TV problem

[Hika van den Hoven]

Hoi Mike,

Sunday, December 14, 2014, 5:36:03 AM, you wrote:

> I'm having a problem with random stalls in live tv. The MBE is running
> Mythbuntu 14.04.1/0.27.4 and the FE is running Mythbuntu 12.04.5/0.27.4.
> There is adequate storage and both livetv storage and the mythconverg 
> database are on separate SSDs.

> This is the backend log at the time of a stall:

>     Dec 13 17:52:54 12000mvd-mbe mythbackend: mythbackend[7520]: N
>     Expire autoexpire.cpp:641 (SendDeleteMessages) Expiring 0 MB for
>     1731 at 2014-12-14T01:51:38Z => "2014 Heisman Trophy Presentation"

>     Dec 13 17:54:53 12000mvd-mbe mythbackend: mythbackend[7520]: W
>     ProcessRequest ringbuffer.cpp:1100 (WaitForReadsAllowed)
>     RingBuf(/var/lib/mythtv/livetv/1731_20141214015139.mpg): Taking too
>     long to be allowed to read..

>     Dec 13 17:55:02 12000mvd-mbe mythbackend: mythbackend[7520]: E
>     ProcessRequest ringbuffer.cpp:1105 (WaitForReadsAllowed)
>     RingBuf(/var/lib/mythtv/livetv/1731_20141214015139.mpg): Took more
>     than 10 seconds to be allowed to read, aborting.

>     Dec 13 17:55:11 12000mvd-mbe mythbackend: mythbackend[7520]: W
>     TFWWrite threadedfilewriter.cpp:571 (DiskLoop)
>     TFW(/var/lib/mythtv/livetv/1731_20141214015139.mpg:82): write(65424)
>     cnt 624 total 37571236 -- took a long time, 19044 ms

> At the same time, the frontend log shows this:

>     Dec 13 17:51:52 Kit mythfrontend.real: mythfrontend[4948]: N
>     CoreContext mythplayer.cpp:2133 (PrebufferEnoughFrames) Player(2):
>     Waited 101ms for video buffers AAAAAAAAAAAAAA

>     Dec 13 17:55:04 Kit mythfrontend.real: mythfrontend[4948]: N
>     CoreContext mythplayer.cpp:2133 (PrebufferEnoughFrames) Player(2):
>     Waited 102ms for video buffers LAAAfAAAAAAAfA
>     .
>     .
>     Dec 13 17:55:14 Kit mythfrontend.real: mythfrontend[4948]: N
>     CoreContext mythplayer.cpp:2133 (PrebufferEnoughFrames) Player(2):
>     Waited 9781ms for video buffers LAAAfAAAAAAAfA

>     Dec 13 17:55:14 Kit mythfrontend.real: mythfrontend[4948]: W Decoder
>     ringbuffer.cpp:1453 (ReadPriv)
>     RingBuf(myth://12000mvd-mbe/1731_20141214015139.mpg):
>     ReadPriv(..32768, normal) -- waited 10009 ms for avail(0) > count(32768)

>     Dec 13 17:55:14 Kit mythfrontend.real: mythfrontend[4948]: E Decoder
>     ringbuffer.cpp:1476 (ReadPriv)
>     RingBuf(myth://12000mvd-mbe/1731_20141214015139.mpg):
>     ReadPriv(..32768, normal) -- timed out waiting for data (10009 ms)

> I'm almost convinced it's a setup issue somewhere because I have an old
> MBE with much less processor power, much less RAM and much slower disk
> system that experiences the problem once or twice a week instead of 3-4
> times per hour. The only setup value that I know is significantly 
> different is the HD Ringbuffer size (in Miscellaneous Settings) which I
> have set to 56400 in the new unit and 9400 in the old.

> Any hints where to look?

'Taking too long to be allowed to read...'
This looks to me to look into file-system rights.
Either that or an over busy sata bus.

Tot mails,
  Hika                            mailto:hikavdh at gmail.com

"Zonder hoop kun je niet leven
Zonder leven is er geen hoop
Het eeuwige dilemma
Zeker als je hoop moet vernietigen om te kunnen overleven!"

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