[openib-general] Timeline of IPoIB performance

[Parks Fields]

Matt,

I have seen the same thing. I just didn't relate it to the Kernel. My 
IPoIB performance is down to ~340MB/sec
with 2.6.12.1 and svn 3040.

With 2.6.13 and svn 3490  the peak is 402MB/sec.







At 02:06 AM 10/7/2005, 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)
>
>   Thanks,
>
>         - Matt
>
>
>
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