[ofw] SRP problems with WinOF 1.0.1

[chas williams - CONTRACTOR]

is any chance we could get someone from microsoft to address this issue?
certain storage targets (like the ddn) are optimized for large i/o sizes.
secondly, the 64k i/o doesnt match any of the "page sizes" for my hardware
raid storage controllers, so i cant get cache write through (another
big win).

In message <6C2C79E72C305246B504CBA17B5500C90345E59A at mtlexch01.mtl.com>,"Leonid
 Keller" writes:
>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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>
>