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Xfce4.4 rendering issue

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libervisco's picture
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Joined: 2006-05-04

Using a beta version of Xfce4.4 I am experiencing some sluggishness in Xfce desktop rendering. I've made a screenshot of it with a summary explaining the issue.

Anyone else using Xfce4.4 and having a similar issue?

free-zombie's picture
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Joined: 2006-03-08
no. When not using a

no.

When not using a compositor, parts of windows that are not displayed are not drawn and must be newly drawn when the window is uncovered. Usually this is not visible to the user as modern computers are sufficiently fast to get to the drawing quickly enough. when, however, the system is under heavy load, the process that needs to redraw its window area may not be getting the CPU and I/O time or memory it needs at the right moment. This also implicitly provides us with a way to see when a process owning an X11 window has hung up or forgotten about the window: it will not redraw after being covered by another window, leaving artifacts.

it could be that the XFCE4 desktop process is run at a low priority to leave many resources to other programs which are more useful to the user.

libervisco's picture
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Joined: 2006-05-04
Well, it seems to me as if

Well, it seems to me as if there is some sort of a bug, possibly a memory leak on the xfce desktop system. It froze on me today when it seemed desktop rendering was taking up way too much CPU time. To add to the trouble, sometimes when freeze ups happen my DVB card (which is used for a satelite downlink) freezes too. Only today I figured out I need to completely cut the power to it (not just shut the computer off) to make it work again...

Anyway, it seems that the problem may be a bit more serious with it. It doesn't look like it's on low priority, but rather that it's taking too much resources and hence slowing down..

I might be wrong, if there is some other cause of this I'm not noticing, but this might be possible too. I suppose I'll have to talk with xfce guys on it...

free-zombie's picture
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Joined: 2006-03-08
yeah, that's the other

yeah, that's the other explanation... not using resources the way it should.

libervisco's picture
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Joined: 2006-05-04
xfce4.4 memory hog

Now that seems almost certain. Ever since I switched from openbox to Xfce I'm getting performance issues after a while of running it. And it doesn't seem like only a Firefox problem. It wasn't this bad even with firefox on openbox. It seems like Xfce has memory leaks.

And htop shows that indeed, xfdesktop and xfce4-panel take up most memory, although I checked only after closing Firefox which probably takes a bit more.

Still I don't think xfdesktop and even xfce4-panel should be anywhere near the top of memory consumers..

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