Date: Sat, 22 Mar 2014 23:15:41 +0000 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: freebsd-infiniband@freebsd.org Subject: Mellanox MT25418 performance IPOIB? Message-ID: <DF61C9D7E8748BF2824DDFED@study64.tdx.co.uk>
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Hi All, I've added a couple of dual port Mellanox MT25418's (Hardware v. a0 / firmware 2.6.0) to two FreeBSD 10.0-Stable amd64 boxes. I was hoping to use them as a cheap alternative to 10Gbps LAN cards for a point to point link to run HAST over. I've remade/installed the world with OFED support - and compiled OFED, SDP, IPOIB_CM, ipoib, mlx4ib, mlxen and mthca in the kernel. I've setup/run opensm - and the cards appear to be active OK - ibstat output seems OK, and ibportstate shows the cabled port is 'Active' / 'LinkUp' and running at 5.0 Gbps using 4X (cards are only connected to each other). I've put an IP on both ends - and can ping between the cards, but TCP/IP performance seems very poor - e.g. a test 'ftp' between the cards only nets around 381Kbyte/s? [iperf shows similarly poor results] I can't see any errors logged anywhere - and 'netstat -b -i' doesn't show any errors either. Anyone else running these cards successfully? My opensm config consists of just 'PORTS="ALL"' - I was unable to find a lot of example opensm file configs. Also I get some chatter dumped on the console (presumably from the drivers) most of it looks just like some kind of debug output [can't see any obvious errors]. fwiw both machines are 1230v3 Xeon based. Can anyone suggest what might be wrong? / What to look at? Thanks, -Karl
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