[Openib-windows] zero copy transfer for XP

[Tzachi Dar]

One more thing about XP and WSD. Windows XP simply doesn't support WSD and this is the situation with all windows client machines (xp-32, xp-64 and vista).
Thanks
Tzachi


________________________________

	From: Erez Cohen [mailto:erezc at dev.mellanox.co.il] 
	Sent: Thursday, January 25, 2007 5:26 PM
	To: 'Gábor Forgács'; Tzachi Dar; openib-windows at openib.org
	Subject: RE: [Openib-windows] zero copy transfer for XP
	
	
	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 
				

			
			

		
		

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