From: Bernd Schubert Subject: Re: client: 2.6.7 client much slower than 2.4.26 Date: Fri, 2 Jul 2004 00:32:25 +0200 Sender: nfs-admin@lists.sourceforge.net Message-ID: <200407020032.28335.bernd-schubert@web.de> References: <200407012318.18934.bernd-schubert@web.de> <1088718192.4349.91.camel@lade.trondhjem.org> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Cc: nfs@lists.sourceforge.net Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1BgA6i-0003HJ-Vw for nfs@lists.sourceforge.net; Thu, 01 Jul 2004 15:32:40 -0700 Received: from smtp06.web.de ([217.72.192.224]) by sc8-sf-mx1.sourceforge.net with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 4.34) id 1BgA6h-0007bQ-Qq for nfs@lists.sourceforge.net; Thu, 01 Jul 2004 15:32:40 -0700 To: Trond Myklebust In-Reply-To: <1088718192.4349.91.camel@lade.trondhjem.org> Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: On Thursday 01 July 2004 23:43, you wrote: > P=E5 to , 01/07/2004 klokka 17:18, skreiv Bernd Schubert: > > benchmarks: > > > > copy a file to the server (2.6.7): ~ 3MB/s > > copy a file to the server (2.4.26): ~ 9MB/s > > > > copy a file from the server (2.6.7): ~ 3MB/s > > copy a file from the server (2.4.26): ~ 11MB/s > > Looks like the wire speeds on read/write are the same. How does the > above compare to ttcp transfer speeds of a 300MB file? Thanks, I didn't know about this tool and I think you are right, it seems t= hat=20 the general network speed is much slower with 2.6.7: 2.4.26: bernd@euklid bernd>nttcp -T taylor Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s CPU-= C/s l 8388608 0.70 0.06 95.2480 1118.4811 2048 2906.74 3413= 3.3 1 8388608 0.71 0.03 94.1283 2485.7897 5793 8125.38 21457= 9.4 2.6.7: bernd@euklid bernd>nttcp -T taylor Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s CPU-= C/s l 8388608 2.67 2.64 25.1472 25.4046 2048 767.43 77= 5.3 1 8388608 2.67 0.03 25.1442 2237.3350 6145 2302.40 20486= 7.5 Its already too late, so I will do the 300MB test tomorrow, but I think the= =20 numbers from the default 8MB test are already convincing. > How much memory does this thing have? The main difference between 2.4.x Somehow this system didn't like to have more than 2x128MB, when we added=20 another DIMM, the system crashed pretty often, though memtest86 showed no=20 problems.=20 > and 2.6.x is the fact that the 2.6.x caches a lot more data and for > longer (the VM is what decides when to flush the cache). > You might want to try twiddling around with the vm sysctl parameters to > see if that makes a difference. > I will try to play with this over the weekend. Thanks again a lot for your help! Cheers, Bernd ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs