[Openib-windows] zero copy transfer for XP

[Erez Cohen]

Hi Gabor,
 
WSD and SDP are both socket interface that can run over IB fabric. WSD is
developed under OpenFabrics while SDP is not due to some legal issues (it is
developed by Mellanox). 
SDP is included in several packages from IB vendors, such as Mellanox WinIB
package. Please contact a Mellanox representative to get the latest and most
stable version.
 
I'm not sure what is the status with DAPL, I would not recommend you to use
it.
 
Erez   


  _____  

From: openib-windows-bounces at openib.org
[mailto:openib-windows-bounces at openib.org] On Behalf Of G?bor Forg?cs
Sent: Thursday, January 25, 2007 3:24 PM
To: Tzachi Dar; openib-windows at openib.org
Subject: Re: [Openib-windows] zero copy transfer for XP


Hello Tzachi,


Thank you for your answer. Well that is a good news.  Sorry, but I still
have some questions. Could you explain how the SDP relates to the WSD 
which does not seem to work for the XP with the driver 1.0.0.331. I always
believed they are the same. Actually my programs have already been 
developed for sdp and udapl under linux now I would like to port them to
windows xp. Does the udapl work under 32 bit XP ? What about zero copy
with udapl ? Where can I find the sdk for windows udapl ? I know it is a
lot.  8) 


regards,gabor



On 1/24/07 10:40 PM, "Tzachi Dar" <tzachid at mellanox.co.il> wrote:



For windows XP we do have SDP support.
Actually SDP is being supported on windows xp / windows server 2003 for
their 32 bits version and their 64 bits version.
Currently our SDP doesn't have zero copy but standard benchmarks show
maximum BW in one direction of 1300 MB/sec and latency of 7 us in Ping-Pong
tests.
This numbers have been achieved on 64 bits systems, but even on XP 32 bit
systems we were able to measure BW of more than 1100 MB/sec.
Although this is not zero copy, this BW is achieved using only one
processor, so on a typical machine today that has more than one core, you
can enjoy the BW and still have one (or more) processors free for doing
other work.

Please note that the performance of SDP as well as stability have improved
since we have last worked with SilverStorm.
I believe that creating a program with normal socket API, will be much
easier than working with DAPL, and you can have your program ready much
faster.
Currently our SDP supports all major socket API including send, recv,
WSASend, WSARecv, (all completion methods including synchronous, overlapped
, a function call, an event or completion ports).

My experience show that the limiting factor for BW is the memory speed, and
with new computers that are shipped today this memory is high enough for
almost any demand. If you want I can send you a program that will allow you
to measure the true performance of your machine and will give you a good
estimation of the BW that you can achieve.

Thanks
Tzachi



 

  _____  

From: openib-windows-bounces at openib.org
[mailto:openib-windows-bounces at openib.org] On Behalf Of Gábor  Forgács
Sent: Wednesday, January 24, 2007 7:36 PM
To:  openib-windows at openib.org
Subject: [Openib-windows] zero copy  transfer for XP

 
Hello,


I just joined to the group recently.  I can not find basic information
regarding to the windows xp infiniband  development.
I can not find the information if there is any ULP for windows  xp with zero
copy support. Could someone help me out ?
I made working the  IPOIB but its speed is quite low under 100 MB/s .
Currently I believe that  there is no sdp support 
for windows xp only for the windows 2003 at least  that is the information I
received from the silverstorm. Is it correct  ?
What would be the way to make work udapl for windows xp e.g. the dapltest
program ? Thank you for your help.

regards,gabor 








-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openfabrics.org/pipermail/ofw/attachments/20070125/5c8297f6/attachment.html>