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

[Ravikesh Chandra <rcha108@xxxxxxxxxxxxxxxxx>]

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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