From mboxrd@z Thu Jan 1 00:00:00 1970 From: Håvard Bjerke Subject: Re: Xen & I/O in clusters - problems! New Information Date: Thu, 28 Oct 2004 18:45:16 +0200 Sender: xen-devel-admin@lists.sourceforge.net Message-ID: <20041028164515.GP23334@idi.ntnu.no> References: <20041028113231.GM23334@idi.ntnu.no> Mime-Version: 1.0 Content-Type: text/plain; charset=unknown-8bit Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Ian Pratt Cc: =?unknown-8bit?Q?H=E5vard?= Bjerke , Rune.Johan.Andresen@idi.ntnu.no, xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org On Thu, Oct 28, 2004 at 01:44:44PM +0100, Ian Pratt wrote: >=20 > Please can you try Xen/linux 2.6.9. Also, please can you remind > me of the spec of your machines.=20 >=20 Specs: Ethernet controller: Intel Corp. 82547GI Gigabit Ethernet Controller CPU: Intel(R) Pentium(R) 4 CPU 3.40GHz single cpu RAM: 1 GB The previous results from 2.4.27 are (I wrote kB/s earlier but that was w= rong): Native: 130k interrupts 114 MB/s Xen0: 180k interrupts 80 MB/s = =20 New results with 2.6.9: Native: bandwidth: 2048000000 bytes in 17.42 real seconds =3D 114794.42 KB/sec CPU: 0.0user 1.4sys 0:17real 8% interrupts: 135k = =20 Xen0: bandwidth: 2048000000 bytes in 21.77 real seconds =3D 91885.76 KB/sec CPU: 0.0user 16.2sys 0:21real 74% interrupts: 107k I also tried sending localhost-localhost in 2.4.27, and interestingly Nat= ive performed 7:1 times better than xen0: Native: bandwidth: 2048000000 bytes in 2.70 real seconds =3D 741704.96 KB/sec CPU: 0.0user 1.6sys 0:02real 62% Xen0: bandwidth: 2048000000 bytes in 17.12 real seconds =3D 116838.03 KB/se= c CPU: 5.9user 0.0sys 0:17real 34% We've also recently benchmarked in an SMP cluster and achieved satisfying= results, ie. around 114 MB/s with both Native and Xen0. But we're still = wondering why we're not achieving full speed in a single-cpu cluster. H=E5vard ------------------------------------------------------- This Newsletter Sponsored by: Macrovision For reliable Linux application installations, use the industry's leading setup authoring tool, InstallShield X. Learn more and evaluate today. http://clk.atdmt.com/MSI/go/ins0030000001msi/direct/01/