[mythtv-commits] Ticket #10428: mythbackend logs RingBuf-messages every few seconds while playing LiveTV

MythTV noreply at mythtv.org
Sat Mar 10 15:09:54 UTC 2012

#10428: mythbackend logs RingBuf-messages every few seconds while playing LiveTV
     Reporter:  kenni                 |      Owner:  danielk
         Type:  Bug Report - General  |     Status:  new
     Priority:  minor                 |  Milestone:  unknown
    Component:  MythTV - Recording    |    Version:  Master Head
     Severity:  medium                |   Keywords:
Ticket locked:  0                     |
 After upgrading from 0.24-fixes to master/0.25, the backend continuously
 writes out RingBuf log messages about it waiting for data:

 mythbackend[9601]: RingBuf(/data/mythtv/livetv/1001_20120310153618.mpg):
 Waited 1.0 seconds for data #012#011#011#011to become available... 130980
 < 196608

 While it does this, LiveTV works fine with no stuttering. The issue seems
 consistent on all channels in LiveTV and playing back recordings does NOT
 give the RingBuf logs. Eg. playing back any recording - even the just-
 recorded LiveTV recording from the recordings menu - does NOT cause the
 backend to write out these messages.

 Logs from ~5 minutes of LiveTV playback is attached. If more verbose logs
 are required to identify the issue, I'll be happy to provide them.

 The tuner is a European HDHR dual DVB-C tuner. The backend is a 3.4GHz
 Core i5 with 12GB RAM and database+OS on a SSD, so it seems unlikely that
 this is a local performance issue.

Ticket URL: <http://code.mythtv.org/trac/ticket/10428>
MythTV <http://code.mythtv.org/trac>
MythTV Media Center

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