Re: [Xen-devel] Xen as a kernel module

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

> I would worry about MPI-style jobs, 
> where you need both low latency and high bandwidth networking, and where 
> you are likely to fully utilize the TLBs as well. I cannot see how 
> performance does not get hurt in this situation, when Xen needs to flush 
> the TLB for every interrupt, or alternatively needs to bundle 
> interrupts, thus increasing latency.

This kind of workload needs measuring to find out just how bad things
are -- it's interesting if only because it will certainly represent a
worst case scenario for us. Ultimately this should be fixed with
smarter NICs. I am optimistic suitable support may end up in high-end
NICs: manufacturers are always looking at how to differentiate their
product, and we have a few contacts we would like to follow up when we
have more time. :-)

 -- Keir


-------------------------------------------------------
This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting
Tool for open source databases. Create drag-&-drop reports. Save time
by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc.
Download a FREE copy at http://www.intelliview.com/go/osdn_nl
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel