Mellanox MT25418 performance IPOIB?
Karl Pielorz
kpielorz_lst at tdx.co.uk
Thu Apr 17 09:10:43 UTC 2014
--On 16 April 2014 14:28:37 +0200 Stig Inge Lea Bjørnsen
<stiginge at pvv.org> wrote:
> You could try to use Infiniband in datagram mode, recompile without the
> IPOIB_CM option.
Ok, same boxes - I just removed IPOIB_CM out of the kernel config and
recompiled / installed it.
iperf now consistently returns:
[ 3] local 10.10.10.2 port 37715 connected with 10.10.10.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 8.71 GBytes 7.46 Gbits/sec
> The maximum MTU will then be 4092, but it might default to 2044. I run
> OpenSM on both machines and set the MTU explicitly:
Yes, mtu defaulted to 2044 - raising it to 4092 actually causes a loss of
.5-1Gbit with iperf (obviously not 'real world') - but at leas I can now
try and use the stuff with real world (now it's returning more than a few
hundred kilobytes a second!).
> The bandwidth reported by iperf is ~7.5 Gbits/sec in both directions.
Same as here then.
Thanks for your email!
Regards,
-Karl
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