Hi Jabe, On Mon, 06 Dec 2010 21:47:42 +0100 Jabe <[email protected]> wrote:
> > > The router is fitted with one ConnectX2 QDR HCA and one dual port > > Myricom 10G > > Ethernet adapter. > > > > ... > > > > Here are some numbers: > > > > - 1 IPoIB stream between client and router: 20 Gbits/sec > > > > Looks OK. > > > > - 2 Ethernet streams between router and server: 19.5 Gbits/sec > > > > Looks OK. > > > > > Actually I am amazed you can get such a speed with IPoIB. Trying with > NPtcp on my DDR infiniband I can only obtain about 4.6Gbit/sec at the > best packet size (that is 1/4 of the infiniband bandwidth) with this > chip embedded in the mainboard: InfiniBand: Mellanox Technologies > MT25204 [InfiniHost III Lx HCA]; and dual E5430 xeon (not nehalem). > That's with 2.6.37 kernel and vanilla ib_ipoib module. What's wrong with > my setup? > I always assumed that such a slow speed was due to the lack of > offloading capabilities you get with ethernet cards, but maybe I was > wrong...? > Also what application did you use for the benchmark? I'm using iperf. Sébastien. > Thank you > _______________________________________________ ewg mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ewg
