<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
For me turning of the Preview helped as well to bring down CPU to
normal levels again.<br>
And I also had the problem with bad recording messing things up.<br>
My speculation though is that they are not related problems though.<br>
Both problems occurred several times on completely separate occasions
here.<br>
<br>
Cheers,<br>
-Tako<br>
<br>
Carl wrote:<br>
<blockquote cite="mid200403102210.01304.mythtv@carldunham.com"
type="cite">
<pre wrap="">Sorry to post speculation without doing further testing, but at one point I
noticed quite a bit of sql activity from the front end. All my high cpu
problems went away when I disabled previews, do I didn't pursue it, but at
the same time I had a couple of bad recordings (in the recorded table but
no .nuv file, or an empty one). Things definitely seemed to go haywire if I
nav'd over the entry in question in the Watch Recorded screen.
PVR-350, Epia 800 (C3). Gentoo.
Hope this helps. If I have time later, I can turn previews back on and try to
reproduce this...
On Wednesday March 10 2004 17:55, Neil Whelchel wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hello again,
I tried it with the preview on and off and in both cases it didn't make
any difference at all. In both cases there was 100% CPU usage and many
interruptions in playback. I already had a look at the other messages
about CPU usage and none of them really applied to what I am dealing with
here. In my case I am NOT having a problem while watching live TV, it is
only a problem while watching something that is pre-recorded. As far as I
can tell, the problem is that the mythfrontend main thread is using a huge
amount of CPU with calls to processEvents().
Clarification:
The mythfrontend player thread in both cases uses the same amount of CPU
and I think it is within reason as to about what it should be.
This has nothing whatsoever to do with mythbackend as it is on a different
machine.
In myhtfrontend/main.cpp startTV() the code fragment looks something
like...
{
qApp->unlock();
qApp->processEvents();
usleep(100000);
qApp->lock();
}
And in mythfrontend/playbackbox.cpp PlaybackBox::play() it looks like...
{
qApp->unlock();
qApp->processEvents();
usleep(50);
qApp->lock();
}
Changing the latter from 50 to 100000 fixes the problem for me.
(The CPU usage is about what it should be both during playback of
recordings and live TV.)
It doesn't appear to have any side effects that I am able to find, that is
why I posted my original question here:
Is there a reason that in one case (live TV) the usleep is for 100000 and
in the other (playback of a recording) it is for 50?
-Neil Whelchel-
First Light Internet Services
760 366-0145
- We don't do Window$, that's what the janitor is for -
On Wed, 10 Mar 2004 <a class="moz-txt-link-abbreviated" href="mailto:steve@nexusuk.org">steve@nexusuk.org</a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On Wed, 10 Mar 2004, Neil Whelchel wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I have been having some issues with my 1Ghz VIA CPU keeping up while
playing back pre-recorded videos (100% CPU usage with video pausing a
few tenths of a second every second or two), however it does fine (40%)
playing live TV.
</pre>
</blockquote>
<pre wrap="">See the previous thread discussed over the past week about high CPU usage
in the CVS version - it seems that (for some people?) the CVS version is
leaving the preview video playing in the background while watching a
recording. Try turning off the preview video in the config and see if it
fixes your problem.
- --
- Steve
<a class="moz-txt-link-freetext" href="http://www.nexusuk.org/">http://www.nexusuk.org/</a>
Servatis a periculum, servatis a maleficum - Whisper, Evanescence
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)
Comment: Public key available at <a class="moz-txt-link-freetext" href="http://www.nexusuk.org/pubkey.txt">http://www.nexusuk.org/pubkey.txt</a>
iD8DBQFATv/F5zUOsIV3bqERAjYPAJ0RkNnlcdA7xr/g5GCuRLVSnC90vgCglZB4
1O3lRM8OIhuPuQs2UvatMZ8=
=LRtz
-----END PGP SIGNATURE-----
</pre>
</blockquote>
</blockquote>
<pre wrap=""><!---->
</pre>
</blockquote>
</body>
</html>