Re: [Xen-users] Dom0 vs native performance: does it look right?

[Peter Booth <peter_booth@xxxxxxx>]

If you look at the wikipedia page for xen it suggests that the  
performance cost of enabling vanilla tls is 50%.
It's worth trying the tls disabled configuration and seeing if this  
changes things


On Apr 12, 2009, at 6:51 PM, Ravikesh Chandra  
<rcha108@xxxxxxxxxxxxxxxxx> wrote:
> Hi Stefan,
>
> Thanks for your reply. However could you please elaborate further on
> your statement?
>
> I have the file
> "/etc/ld.so.conf.d/kernelcap-2.6.18-128.1.6.el5xen.conf" which
> contains "hwcap 0 nosegneg".. is that what you mean? I am running a
> 64-bit installation btw.
>
> Thanks in advance.
>
>
> 2009/4/13 Stefan de Konink <stefan@xxxxxxxxx>:
> > Ravikesh Chandra wrote:
> > > Hi folks,
> > >
> > > Firstly I am running CentOS 5.3 with Xen 3.3.1 (gitco) and I've just
> > > been testing the performance with the Unixbench test. What I found  
> > > is
> > > that running the test on the Dom0 (under Xen kernel) resulted in  
> > > only
> > > 50% performance of native! I appreciate there is always going to be
> > > overheads with virtualisation but I just wanted to check with the  
> > > list
> > > if these numbers were expected? If that doesn't seem normal any
> > > suggestions on what I could look at?
> > no tls cflag is a start.
> >
> >
> > Stefan
> >
> > _______________________________________________
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> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
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