Hal Burgiss wrote:
> Top seems to show X CPU % to fluctuate a fair amount. Occasional
> spikes from less than 1% to 20-30% while I am just sitting watching
> top. If I constantly drag a window around it will bump up to 80% or
> so. On the otherhand ps almost always shows X at about 4%. Little to
> no fluctuation -- no matter what. Who's right?
It appears to be "not a bug". I brought this up on redhat's bug
tracking system a couple of months ago, and Alan (himself) seems to
think that some changes made to the UNIX socket handling make
applications using UNIX sockets (that's all of your X stuff) _appear_ to
take up more processor time than they actually do. I believe they are
being syncronised with the kernel's load testing. Since operations on
UNIX sockets get sync'ed with the test, they get reported more often
than they probably should. As far as I can tell, however, the
performance of UNIX sockets (or anything else) doesn't suffer from this
behavior, even though I went in convinced that they did.
Unless you notice things slowing down where I did not (and I wrote a
small app to test it), then don't worry about it.
MSG
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