[haiku-bugs] Re: [Haiku] #11173: Media player breaks under heavy load
- From: "stippi" <trac@xxxxxxxxxxxx>
- Date: Fri, 29 Aug 2014 11:31:50 -0000
#11173: Media player breaks under heavy load
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Reporter: _samui | Owner: stippi
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Applications/MediaPlayer | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by stippi):
Replying to [comment:2 _samui]:
> The problem with testing with alpha4.1 is that there are so many video
playback problems with it so would be pointless to test in my opinion. The
recent work by Colin has improved things much, the video playback works
really well now compared to say 2 months ago.
Interesting. What video formats have improved the most for you?
> When the load goes high enough and deskbar freezes, how can I see the
cpu consumption? Is there a thing to enter to the terminal to see it? Of
course all that video stuff is realtime priority, im not suprised them
freezing stuff.
You can launch the command `top` in the Terminal. In Deskbar, you should
have the display of the CPU activitiy and it has a right-click menu where
you see load graphically by component. But with Deskbar being frozen, this
might not be helpful.
With the media playback, two contradicting concepts clash: High priority
threads should not be CPU-intensive threads. But audio should not skip, so
it is high priotity and it is decoding (CPU intensive). Sometimes video
decoding is intermangled, since it is reading from the same file any may
even contain important sync information.
In any case, the audio decoding having a higher priority than GUI redraw
is on purpose so a peak of graphics activity does not make the audio skip.
The freezing ''may'' be expected, depending on whether it is reasonable,
given the actual video files you played and your hardware, to expect so
many to play concurrently. In any case, !MediaPlayer should not be left
broken after things return back to normal.
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Ticket URL: <https://dev.haiku-os.org/ticket/11173#comment:3>
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