[mythtv-users] Playback problem -- random short pauses

[Phil Wild]

On Mon, May 23, 2011 at 10:26 PM, Andre <mythtv-list at dinkum.org.uk> wrote:

>
> On 23 May 2011, at 16:17, Steven Adeff wrote:
>
> > On Mon, May 23, 2011 at 9:41 AM, Mark Lord <mythtv at rtr.ca> wrote:
> >> On 11-05-23 08:08 AM, Steven Adeff wrote:
> >>> Are any of the more involved Dev's other than JYA paying attention to
> >>> this? (this is a callout for them to answer).
> >>>
> >>> It's looking like this may be a major issue that many users, with
> >>> varying levels of hardware, are experiencing. I think it may be time
> >>> to  create a ticket for this issue, but it would be nice to have a dev
> >>> that can work with us in figuring out what's going on, and how exactly
> >>> to create a ticket that will lead to some debugging help from the
> >>> dev's for the users experiencing the problem to use to troubleshoot.
> >>>
> >>> the other end of all this is that it may be an issue that some of the
> >>> further tweaking that's been done for the next release has resolved
> >>> already. I'm wondering if anyone running off the latest git is
> >>> experiencing?
> >>
> >>
> >> I take it this is only (or is it primarily?) happening in trunk,
> >> and not in 0.24-fixes?  I only run the latter here (no pauses).
> >>
> >> What I would look for in the code, are sync(), fsync(),
> >> and fdatasync() calls.  Those generally force writes to happen
> >> and pause a lot of stuff to wait for them to complete in real-time.
> >>
> >> Which can lead to tiny pauses and glitches elsewhere.
> >>
> >> So just as a trial, perhaps grep through the code looking for those,
> >> and temporarily remove them, to see if the problem then goes away.
> >> That should prove/disprove this theory.
> >
> > this is happening in 0.24-fixes for pretty much everyone, and looks to
> > have started with 0.24 as people who changed no hardware and upgraded
> > to 0.24 started experiencing the issue. I don't know if anyone using
> > trunk is having the issue. it also does not look like everyone has the
> > issue, and the severity varies as well. It also looks like it is also
> > only an issue with HD content.
>
> I see the same problem with SD too, well I did, I haven't watched any SD
> for months :-)
>
> Andre
>
> >
> > I think I will create a wiki page to keep track of each persons
> > experience. A table with columns for specific issue notes, etc.
> >
> > I think I may also need to temporarily upgrade to trunk to see if the
> > issue goes away. Hopefully trunk is not severely buggy...
> >
> > --
> > Steve
> > http://www.mythtv.org/wiki/User:Steveadeff
> > Before you ask, read the FAQ!
> > http://www.mythtv.org/wiki/index.php/Frequently_Asked_Questions
> > then search the Wiki, and this list,
> > http://www.gossamer-threads.com/lists/mythtv/
> > Mailinglist etiquette -
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> > _______________________________________________
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> >
>
> I am seeing it with HD and SD content. I spend a lot of time using "Watch
Videos" and have configured the system to only use storage groups and I see
it here as well.
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