Hi Matt, On Fri, 2005-10-07 at 04:06, Matt Leininger wrote: > I'm seeing an IPoIB netperf performance drop off, up to 90 MB/s, when > using kernels newer than 2.6.11. This doesn't appear to be an OpenIB > IPoIB issue since the in-kernel and a recent svn3687 snapshot both have > the same performance (464 MB/s) with 2.6.11. I used the same kernel > config file as a starting point for each of these kernel builds. Have > there been any changes in Linux that would explain these results? > > > All benchmarks are with RHEL4 x86_64 with HCA FW v4.7.0 > dual EM64T 3.2 GHz PCIe IB HCA (memfull) > > Kernel OpenIB msi_x netperf (MB/s) > 2.6.14-rc3 in-kernel 1 374 > 2.6.13.2 svn3627 1 386 > 2.6.13.2 in-kernel 1 394 > 2.6.12 in-kernel 1 406 > 2.6.11 in-kernel 1 464 > 2.6.11 svn3687 1 464 > 2.6.9-11.ELsmp svn3513 1 425 (Woody's results, 3.6Ghz EM64T)
There was already the following thread on netdev that I found: TCP Network performance degade from 2.4.18 to 2.6.10 http://marc.theaimsgroup.com/?l=linux-netdev&m=112792558832125&w=2 I think you should (cross)post this to netdev. -- Hal _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
