[mythtv-users] HELP! - More failures while recording - IOBOUND - blocking in ThreadedFileWriter::Write()

[Endaf Jones]

Yes, I have seen this too (in the last two weeks or so), but with 
mythfilldatabase run while recording.

Please see ticket 348 and notice my blocking errors as well.
http://cvs.mythtv.org/trac/ticket/348

This yields corrupt recordings for myself.

Perhaps it's the same, perhaps it's different.  Judging my Isaac's 
comments (and lack of), he is unwilling to acknowledge my issue as a 
problem with Myth but rather believes this is a problem with my setup.   
I am of a different opinion.  You may want to investigate your system 
further to make sure.

Please speak up in the dev list if you feel this is the same issue.

# Endaf



Mark Knecht wrote:

>HELP!
>
>WAF & KAF have gone to ZERO!
>
>For the last two days I've been failing to record properly when
>recording two shows. The mythbackend log file is filling with messages
>such as this:
>
>2005-09-23 08:29:41.168 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.190 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.202 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.248 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.266 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.278 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.301 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.330 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:41.367 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:44.473 IOBOUND - blocking in ThreadedFileWriter::Write()
>2005-09-23 08:29:44.666 IOBOUND - blocking in ThreadedFileWriter::Write()
>
>Any ideas? This is all a new problem since Tuesday.
>
>3GHz P4, 512MB, 2.6.12-gentoo-r6 for the last two months,
>PVR-150/PVR-250, ivtv-0.3.7 & ivtv-0.3.9 - both drivers fail the same
>way.
>
>I have lots of disk space. The video storage drive is mounted over NFS
>so it's possible there's some sort of NFS permissions thing going on,
>but the problem only occurs when I'm recording two shows. If I record
>a single show the receording is good and I do not get these messages.
>
>Local DMA is enabled. Video storage is over the network to NFS so I
>could use a program for testing NFS read and write speeds, etc.
>
>I've found a few threads talking about changing MythTV code to make
>buffers larger, etc., but why now when it's worked great for the last
>2-3 months?
>
>As best I can tell I did some updates to the machine on Sept. 13th, 7
>days before the problem started. Thse updates where:
>
>xorg-x11
>python
>udev
>libpcap
>eix
>k3b
>
>After that there were no more updates until Sept. 22nd, yesterday,
>which was two days after the problem started.
>
>thanks,
>Mark
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