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Re: [Xen-devel] xm commands run very slow ....

To: Ewan Mellor <ewan@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] xm commands run very slow ....
From: Himanshu Raj <rhim@xxxxxxxxxxxxx>
Date: Wed, 25 Jan 2006 17:06:36 -0500
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Thanks Ewan.

I also saw one more discrepency which might be the root of this problem.
When I do xend start on first machine, 8 processes start up (i.e. ps aux | grep
xend shows actually 8 proceeses).
On my other machine, I see only 2 processes. Do you think it is the problem?


> > I know it is kind of vague problem, but I am banking of somebody seeing the 
> > exact thing.
> > 
> > I have two machines with everything identical, except on one machine I 
> > compile
> > xen and on other I just use the binaries compiled on the previous machine.
> > 
> > Now on first machine, where I compile everything, xm invocation is 
> > veeeeeeeeeery
> > slow. Although it doesn't seem to be "system" problem. Look at a 
> >         time xm list 
> > invocation:
> >         real 32s
> >         user .2s
> >         sys  .02s
> > 
> > On another machine the real time is very close to user+sys.
> > 
> > I just can't comprehend why this is going on. Any clues will be deeply 
> > appreciated.
> xm is a client to Xend, talking over HTTP -- xm is simply blocking for 30
> seconds waiting for the server -- you need to figure out why the server is
> spinning or stalling.
> /var/log/xend.log may help.  top may help also.
> Ewan.

Himanshu Raj
PhD Student, GaTech (www.cc.gatech.edu/~rhim)
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