WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

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

To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Xen as a kernel module
From: Mark Williamson <Mark.Williamson@xxxxxxxxxxxx>
Date: Thu, 27 Jan 2005 13:24:56 +0000
Cc: Jacob Gorm Hansen <jacobg@xxxxxxx>, "Neugebauer, Rolf" <rolf.neugebauer@xxxxxxxxx>, Kip Macy <kmacy@xxxxxxxxxxx>
Delivery-date: Fri, 28 Jan 2005 18:09:52 +0000
Envelope-to: xen+James.Bulpin@xxxxxxxxxxxx
In-reply-to: <41F70A8F.9030200@xxxxxxx>
List-archive: <http://sourceforge.net/mailarchive/forum.php?forum=xen-devel>
List-help: <mailto:xen-devel-request@lists.sourceforge.net?subject=help>
List-id: List for Xen developers <xen-devel.lists.sourceforge.net>
List-post: <mailto:xen-devel@lists.sourceforge.net>
List-subscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=subscribe>
List-unsubscribe: <https://lists.sourceforge.net/lists/listinfo/xen-devel>, <mailto:xen-devel-request@lists.sourceforge.net?subject=unsubscribe>
References: <39CC97884CA19A4D8D6296FE94357BCB0161A804@swsmsx404> <41F70A8F.9030200@xxxxxxx>
Sender: xen-devel-admin@xxxxxxxxxxxxxxxxxxxxx
User-agent: KMail/1.7.1
> for a specific type of application. I would worry about MPI-style jobs,
> where you need both low latency and high bandwidth networking, and where

Won't many people running this sort of workload be using specialised network 
hardware anyhow?  A modern cluster interconnect (Infiniband, for instance) 
will likely support direct IO to user level applications - this could still 
be done under Xen.

Cheers,
Mark

> 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.
>
> Jacob
>
>
> -------------------------------------------------------
> 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


-------------------------------------------------------
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