[ofw] SRP problems with WinOF 1.0.1

[Leonid Keller]

Please, do not use "Enabling large SG lists" flag (ModeFlag=2).
It violates StorPort restriction and can cause problems.
I've added it for the goal of checking performance with 1MB size buffers
and in hope, that the restriction will be soon removed.
I was working then with SP1 and StorPort driver gave me 1MB size
packets.
Seems like MS patched the StorPOrt in SP2.
As I understood from the patches to this list, SP2's StorPort ignores a
try to increase the number of physical breaks, so ModeFlag=2 won't cause
problems, but also won't work.

About the max packet size.
>From my experience, the largest packet size with StorPort is 64K.
And it seems that there is no way to overcome this restriction.


> -----Original Message-----
> From: ofw-bounces at lists.openfabrics.org 
> [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Eleanor Witiak
> Sent: Tuesday, February 05, 2008 7:47 PM
> To: chas williams - CONTRACTOR; Mirko Benz
> Cc: ofw at lists.openfabrics.org
> Subject: RE: [ofw] SRP problems with WinOF 1.0.1
> 
> I'm running revision 807 (and I don't see any SRP changes 
> between 807 and 1.0.1) and I too get 64k on Windows Server 
> 2003 32-bit.  
> 
> I've also tried it on Windows Server 2003 64-bit and I see 
> similar numbers.
> 
> I'm actually trying to go above 64k but my issue is I can't 
> seem to get pass 17 for number of physical breaks.  
> 
> -----Original Message-----
> From: ofw-bounces at lists.openfabrics.org
> [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of chas 
> williams - CONTRACTOR
> Sent: Tuesday, February 05, 2008 12:04 PM
> To: Mirko Benz
> Cc: ofw at lists.openfabrics.org
> Subject: Re: [ofw] SRP problems with WinOF 1.0.1
> 
> In message <47A707E4.9040206 at xiranet.com>,Mirko Benz writes:
> >- Enabling large SG lists (ModeFlags = 3) does not work. 
> Maximum we see
> 
> >is 32k per I/O
> >
> >FMR_POOL and large I/O sizes work when using a 64 bit 
> Windows version. 
> >Anybody else seeing this problem?
> 
> interesting.  we see 64k i/o sizes on 32-bit windows (windows 
> server 2003).
> 
> we havent tested 64-bit windows much.
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