From: Bin Ren <bin.ren@gmail.com>
To: Rune Johan Andresen <runejoha@idi.ntnu.no>
Cc: Xen Virtual Machine Monitor <xen-devel@lists.sourceforge.net>,
H=E5vard_Bjerke <havard.bjerke@idi.ntnu.no>,
Rune Andresen <rune.johan.andresen@idi.ntnu.no>
Subject: Re: Xen & I/O in clusters - Single Vs. Dual CPU issue
Date: Thu, 4 Nov 2004 18:41:27 +0000 [thread overview]
Message-ID: <8ae78025041104104164c4ebf9@mail.gmail.com> (raw)
In-Reply-To: <E95384DF-2E88-11D9-8795-000A95B44940@idi.ntnu.no>
Among A1, A2, B1, B2, which ones are domain 0 and which are unpriviledged?
- Bin
On Thu, 4 Nov 2004 18:42:34 +0100, Rune Johan Andresen
<runejoha@idi.ntnu.no> wrote:
> Well, after the issue between two xen dom0 domains is solved there is a
> new case we don't
> understand:
>
> With two physical domains and 4 guest OSs (2 on each physical node) we
> get some rare results with ttcp (b=1000000, l = 1000000):
>
> Lets say we have two guest OSs on physical node A, A1 and A2, and two
> guest OSs on physical node B, B1 and B2.
>
> Between A1 and B1 I get 110 000 KB/s (which is almost optimal!)
> Between A1 and B2 I get 81 0000 KB/s
> Between A2 and B1 I get 94 000 KB/s
>
> Do you have any idea why we get less performance in the last two cases?
> It doesn't make sense. It cant be
> a bottleneck in the network either because of case 1.(?)
>
> Cheers,
> Rune
>
>
>
>
> On Nov 2, 2004, at 5:51 PM, Mark A. Williamson wrote:
>
> >> If you're using MPI over TCP/IP (which I imagine you are) then it
> >> should
> >> Just Work (TM). We have tried live migration with MPI applications
> >> but you
> >> shouldn't have any problems moving the VMs around with a cluster.
> >
> > Sorry I meant to say we have *not* tried live migration with MPI
> > applications.
> >
> > Note to self: read before clicking send!
> >
> > Cheers,
> > Mark
> >
> >
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next prev parent reply other threads:[~2004-11-04 18:41 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-13 5:12 plan 9 status Ronald G. Minnich
2004-10-13 12:14 ` Mark A. Williamson
2004-10-13 22:18 ` Ronald G. Minnich
2004-10-14 0:52 ` Kip Macy
2004-10-14 8:10 ` Keir Fraser
2004-10-14 10:35 ` Wesley Parish
2004-10-14 11:04 ` Keir Fraser
2004-10-14 15:32 ` Ronald G. Minnich
2004-10-14 15:57 ` Keir Fraser
2004-10-21 16:06 ` Keir Fraser
2004-10-14 15:53 ` Mark A. Williamson
2004-10-14 17:45 ` Xen & I/O in clusters - problems! Rune Johan Andresen
2004-10-14 18:17 ` Ian Pratt
2004-10-14 23:24 ` Mark A. Williamson
2004-10-15 13:48 ` Rune Johan Andresen
2004-10-21 19:12 ` Xen & I/O in clusters - problems! New Information Rune Johan Andresen
2004-10-21 20:24 ` Ian Pratt
2004-10-22 16:36 ` Rune Johan Andresen
2004-10-22 17:47 ` Ian Pratt
2004-10-27 17:11 ` Håvard Bjerke
2004-10-27 18:26 ` Ian Pratt
2004-10-27 18:40 ` Mark A. Williamson
2004-10-28 11:51 ` Håvard Bjerke
2004-10-28 13:09 ` Mark A. Williamson
2004-10-28 11:32 ` Håvard Bjerke
2004-10-28 12:44 ` Ian Pratt
2004-10-28 16:45 ` Håvard Bjerke
2004-10-29 17:05 ` Xen & I/O in clusters - Single Vs. Dual CPU issue Rune Johan Andresen
2004-10-29 17:24 ` Ian Pratt
2004-10-29 18:39 ` Håvard Bjerke
2004-10-29 19:46 ` Ian Pratt
2004-11-02 16:13 ` Håvard Bjerke
2004-11-02 16:35 ` Mark A. Williamson
2004-11-02 16:51 ` Mark A. Williamson
2004-11-04 17:42 ` Rune Johan Andresen
2004-11-04 18:41 ` Bin Ren [this message]
2004-11-05 14:53 ` Rune Johan Andresen
2004-11-05 16:47 ` Keir Fraser
2004-11-05 17:33 ` Rune Johan Andresen
2004-11-06 8:04 ` Keir Fraser
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