linux-kernel - Socket Direct Protocol: help

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Date:	Mon, 12 Apr 2010 10:14:45 +0200 (CEST)
From:	Andrea Gozzelino <Andrea.Gozzelino@....infn.it>
To:	linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
	rolandd@...co.com, peterz@...radead.org, pavel@....cz,
	mingo@...e.hu, Eric B Munson <ebmunson@...ibm.com>,
	Steve Wise <swise@...ngridcomputing.com>
Subject: Socket Direct Protocol: help

Good morning,

I'm testing some Neteffect cards (Intel code E10G81GP - Neteffect
NE020.LP.1.SSR).
PC has Linux| (kernel version) 2.6.18-164.15.1.el5 | x86_64 x86_64
x86_64 GNU/Linux.

In this phase, I measure the bandwidth with the netserver/nerperf
(version netperf-2.4.5) ad hoc tests.
They work fine with TCP protocol - as OFED 1.5.1 example programs - and
they have some problems with SDP one.

I'm trying test with the command lines below:

server: LD_PRELOAD=/usr/local/lib64/libsdp.so netserver

client: LD_PRELOAD=/usr/local/lib64/libsdp.so netperf -H server_address
-c -C
-- -m 65536

The /etc/libsdp.conf file contains rules below:
use both listen * *:*
use both connect * *:*
log min-level 9 destination file libsdp.log

Client displays "Connection error: Can not allocate memory" and the
connection fails.
(original text on client log file:libsdp Error connect: failed for SDP
fd:6 with error:Cannot allocate memory)

The library path is:
/usr/local/lib64/libsdp.so

Could someone explain me how LD_PRELOAD environment variable must be
set?
I don't understand why the test work with TCP and not with SDP.
Could I work with wrong Linux kernel environment or parameters?

I don't know if there is a specific mailing list for SDP so I ask you
help.

Thank you very much,
Andrea 

Andrea Gozzelino

INFN - Laboratori Nazionali di Legnaro	(LNL)
Viale dell'Universita' 2
I-35020 - Legnaro (PD)- ITALIA
Tel: +39 049 8068346
Fax: +39 049 641925
Mail: andrea.gozzelino@....infn.it			

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