From: "Andrew Theurer" Subject: Re: Re: [PATCH] zerocopy NFS for 2.5.36 Date: Thu, 17 Oct 2002 08:16:43 -0500 Sender: nfs-admin@lists.sourceforge.net Message-ID: <003301c275e1$0bf76810$2a060e09@beavis> References: <15788.57476.858253.961941@notabene.cse.unsw.edu.au><20021015.213102.80213000.davem@redhat.com><012d01c27581$677d2180$2a060e09@beavis> <20021017.113126.102592502.taka@valinux.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Cc: , , , Return-path: Received: from mg03.austin.ibm.com ([192.35.232.20]) by usw-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 182AbM-0006wl-00 for ; Thu, 17 Oct 2002 06:22:13 -0700 To: "Hirokazu Takahashi" Errors-To: nfs-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Unsubscribe: , List-Archive: Subject: Re: [NFS] Re: [PATCH] zerocopy NFS for 2.5.36 > Hello, > > Thanks for testing my patches. > > > I am still seeing some sort of problem on an 8 way (hyperthreaded 8 > > logical/4 physical) on UDP with these patches. I cannot get more than 2 > > NFSd threads in a run state at one time. TCP usually has 8 or more. The > > test involves 40 100Mbit clients reading a 200 MB file on one server (4 > > acenic adapters) in cache. I am fighting some other issues at the moment > > (acpi wierdness), but so far before the patches, 82 MB/sec for NFSv2,UDP and > > 138 MB/sec for NFSv2,TCP. With the patches, 115 MB/sec for NFSv2,UDP and > > 181 MB/sec for NFSv2,TCP. One CPU is maxed due to acpi int storm, so I > > think the results will get better. I'm not sure what other lock or > > contention point this is hitting on UDP. If there is anything I can do to > > help, please let me know, thanks. > > I guess some UDP packets might be lost. It may happen easily as UDP protocol > doesn't support flow control. > Can you check how many errors has happened? > You can see them in /proc/net/snmp of the server and the clients. server: Udp: InDatagrams NoPorts InErrors OutDatagrams Udp: 1000665 41 0 1000666 clients: Udp: InDatagrams NoPorts InErrors OutDatagrams Udp: 200403 0 0 200406 (all clients the same) > And how many threads did you start on your machine? > Buffer size of a UDP socket depends on number of kNFS threads. > Large number of threads might help you. 128 threads. client rsize=8196. Server and client MTU is 1500. Andrew Theurer ------------------------------------------------------- This sf.net email is sponsored by: viaVerio will pay you up to $1,000 for every account that you consolidate with us. http://ad.doubleclick.net/clk;4749864;7604308;v? http://www.viaverio.com/consolidator/osdn.cfm _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs