[Bug] Tvservice cpu usage increase problem while .ts playback fullscreen (1 Viewer)

[SciDoctor]

The jpg's below show the problem, logs also attached.

This is repeatable and consistant, the dramatic cpu increase of tvservice isn't a peak that subsides but is constantly high.

A cpu increase from 1-4% to 20-30% for tvservice shows something is wrong. this doesn't occur in 1.2alpha or 1.1.3.

When playing back a .ts recording the tvservice cpu usage increases substantialy when in fullscreen compared to not fullscreen, the difference is upto 25-30%.

Capture - Capture 3 show usage while timeshifting only and also recording playback only.

Capture 4 is the greatest increase, recording and also playing back a different file tvservice cpu usage was hitting nearly 40%, the jpg shows a lower cpu usage as the snip tool caused the decrease as 100cpu usage was now on the system.

In all the above cases the epg grab was allowed to finish so as not to skew the results.

A quick look through the logs and I couldn't see anything that could be causing this.

 

[tompa]

I can confirm this on my setup too.

Talked to gibman about this a couple months ago and we could not figure out what the problem was, but we never really digged in to it ...

/tompa

 

[gibman]

maybe the tvplugin's "TVfullscreen class" does a lot of polling the remoting layer of the tvservice.

should be fairly easy to see if you could attach a cpu/performance profiler to tvservice.exe process.

/gibman

 

[tompa]

I'm not at home right now, but maybe SciDoctor could do that?

/tompa

 

[SciDoctor]

That might be beyond my knowledge !

More logs attached though if this helps. this time just bringing up any UI menu in fullscreen causes the cpu increase to drop to normal in tvservice. jpg's attached. I have tried every UI combination now to see if there are any other similar problems, there don't seem to be though just the ones listed

This test was done while timesgifting and epg grab, you can see that the sytem performance suffers badly. sql update would take forever 25% of cpu usage is wasted in ? 'polling' ?

 

[gibman]

ok problem confirmed.
happens on TV as well as for rec's.

culprit is:

 	TvPlugin.dll!TvPlugin.ChannelNavigator.UpdateCurrentChannel() Line 472	C#
 	TvPlugin.dll!TvPlugin.ChannelNavigator.CheckChannelChange() Line 394 + 0x9 bytes	C#
 	TvPlugin.dll!TvPlugin.TvFullScreen.CheckTimeOuts() Line 2625 + 0x19 bytes	C#
	TvPlugin.dll!TvPlugin.TvFullScreen.Process() Line 2265 + 0xc bytes	C#

UpdateCurrentChannel calls many times per sec. the following line:
=> if (TVHome.Card.IsTimeShifting || TVHome.Card.IsRecording)

each of those calls does a remoting call to server. which is polling => high cpu usage on tvservice.exe

/gibman

 

[gibman]

can u try the attached patch.
It makes a difference here.
now we only query the server if a channel change is pending. eg. when using numeric keys, mini guide.. etc.

it limits the polling and decreases cpu usage.

its based on current svn.. but u should be able to patch the version u r running as well.

/gibman

 

[FreakyJ]

AW: Tvservice cpu usage increase problem while .ts playback fullscreen

I like to see all the improvements concerning TvServer *Thumbs up*

 

[elliottmc]

Re: AW: Tvservice cpu usage increase problem while .ts playback fullscreen

I like to see all the improvements concerning TvServer *Thumbs up*

Are you saying that you have tested this patch and it works fine?

 

[SciDoctor]

Thanks i will test and get back to you by thursday. the next time I have internet access.