[openib-general] Configuration of sdp

[Karun Sharma]

I have seen almost double performance with SDP as compared to IPoIB.
 
Karun

________________________________

From: Sean Hubbell [mailto:shubbell at dbresearch.net]
Sent: Wed 11/29/2006 5:22 PM
To: Karun Sharma
Cc: openib-general at openib.org
Subject: Re: [openib-general] Configuration of sdp



Yes, I tried that in our testing when I loaded the ib_sdp (I did just
use the defaults). I was wondering if the numbers that we are seeing
seem consistent with everyone elses... and at what point will the sdp
module increase my bandwidth when using a legacy / third party network
library?

Sean

Karun Sharma wrote:
> Hi Sean:
> 
> If you are using OFED 1.1 release, you will find a "README.txt" file
> (/usr/local/ofed/ directory). In this file, configuration steps of SDP
> are mentioned.
> 1. modprobe ib_sdp
> 2. export LD_PRELOAD=/usr/local/ofed/lib/libsdp.so
> 3. export LIBSDP_CONFIG_FILE=/usr/local/ofed/etc/libsdp.conf
> <application name>.
> 
> You may need to modify libsdp.conf before step 3.
> 
> Thanks
> Karun
> 
>
> ------------------------------------------------------------------------
> *From:* openib-general-bounces at openib.org on behalf of Sean Hubbell
> *Sent:* Tue 11/28/2006 10:34 PM
> *To:* openib-general at openib.org
> *Subject:* [openib-general] Configuration of sdp
>
> Hello,
>
>   I have a question... we have tested our network on our cluster using
> iperf v2.0.2.
>
> Our first test was using Gig-E network and the results were 941 Mbps.
> (i.e. iperf -c <ipaddress> and iperf -s)
>
> Our second test was using Gig-E network and the results were 1.05 Mbps
> using UDP.
> (i.e. iperf -c <ipaddress> -u and iperf -s -u)
>
> Our third test was using IBv4 network and the results was a max of 3.8
> Mbps using TCP.
> (i.e. iperf -c <ipaddress> -P[1-16] and iperf -s)
>
> Loaded ib_sdp module and then tested:
> Our fourth test was using IBv4 network and the results was a max of 4.16
> Mbps using UDP.
> (i.e. iperf -c <ipaddress> -b1000M -P[1-16] and iperf -s -u)
>
> UNLOADED ib_sdp module and then tested:
> Our fourth test was using IBv4 network and the results was a max of 4.16
> Mbps using UDP.
> (i.e. iperf -c <ipaddress> -b1000M -P[1-16] and iperf -s -u)
>
> My question is what impact would it have on our network if configured
> sdp and is there an example of how to configure sdp somewhere on the wiki?
>
> Thanks,
>
> Sean
>
>
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