Tobey,<div><br></div><div>Thanks for share this informations,�unfortunately I'm using Hyper-v 6.1 running Linux, I take a look about Hyper-v paravirtualization kernel for Linux and drivers for�hypervisor�and it is a very big concern.</div>
<div><br></div><div>Thanks for paper, I will try to do some workaround for this environment and report the result.</div><div><br></div><div>Regards.<br><br><div class="gmail_quote">On Fri, Feb 26, 2010 at 12:03 AM, Al Tobey <span dir="ltr"><<a href="mailto:tobert@gmail.com">tobert@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">On Thu, Feb 25, 2010 at 6:08 PM, Gustavo Aquino<br>
<<a href="mailto:aquino.gustavo@gmail.com">aquino.gustavo@gmail.com</a>> wrote:<br>
> Hi,<br>
> Anybody here are using Rabbit +Erlang on VM with more than 2 CPUs with 2<br>
> cores ?<br>
<br>
</div>I'm running a clustered instance on two Linux VM's with 1G RAM and 2<br>
CPU's on top of Linux/KVM hypervisors (each instance is on a different<br>
physical VM server). � �It works fine and has done so for a long time.<br>
<div class="im"><br>
> Erlang doen't work in this environment for me,if I remove one CPU all works<br>
> fine, but putting other it's crash with the MONOTONIC�CLOCK�problem.<br>
<br>
</div>It's impossible to say what's going on without knowing what hypervisor<br>
and guest you're using. �If it's KVM/Linux, you may try enabling the<br>
paravirtual clock options in the guest kernel. � � There are a<br>
multitude of workarounds for clock problems in VM's and which one to<br>
use depends entirely on your guest/hypervisor combination.<br>
<br>
VMWare has a nice paper on the topic.<br>
<a href="http://www.vmware.com/pdf/vmware_timekeeping.pdf" target="_blank">http://www.vmware.com/pdf/vmware_timekeeping.pdf</a><br>
<br>
-Al Tobey<br>
<br>
> Regards.<br>
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</div></div></blockquote></div><br></div>