Java RE app still causes massive Xorg CPU hog

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Java RE app still causes massive Xorg CPU hog

Postby DebbyIan » 2017-08-23 12:15

https://bugs.launchpad.net/ubuntu/+sour ... bug/238629

I'm looking at this bug and it would seem that this issue is still present.
I have a Java app running but only Xorg CPU utilisation is way past 50%, almost 95% is some cases. The system isn't very responsive in this case. Notably the keyboard slows down. Go figure.

I'm not using any xorg.conf. The default xorg config sets the Intel driver to SNA. If I set this:

Code: Select all
Option "AccelMethod" "xaa"


The improvement is marginal but I can't be certain if the mode is being used.

Image


Tried both Oracle and OpenJDK JREs.
DebbyIan
 
Posts: 114
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Re: Java RE app still causes massive Xorg CPU hog

Postby DebbyIan » 2017-09-06 09:50

In fact removal of the xorg-intel driver (ie, resorting to kernel modesetting entirely) has had no effect or improvement either.
DebbyIan
 
Posts: 114
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Re: Java RE app still causes massive Xorg CPU hog

Postby DebbyIan » 2017-09-06 10:42

Image
DebbyIan
 
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