[ofw] windows srp

[Fab Tillier]

There are no runtime tunables.  The driver should be able to send larger
I/O requests assuming changes were made to allocate room for the buffer
descriptor tables.  I don't know what changes would be required off the
top of my head, though.

 

-Fab

 

From: ofw-bounces at lists.openfabrics.org
[mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Michael Di
Domenico
Sent: Wednesday, April 18, 2007 10:05 AM
To: Fab Tillier; ofw at lists.openfabrics.org
Subject: RE: [ofw] windows srp

 

Fab,

 

Are there no runtime tunables like there are for linux?  Are the drivers
capable of sending large block IO's, like on the order of 512k or 1024k
bytes per?

 

________________________________

From: Fab Tillier [mailto:ftillier at windows.microsoft.com] 
Sent: Wednesday, April 18, 2007 12:55 PM
To: Michael Di Domenico; ofw at lists.openfabrics.org
Subject: RE: [ofw] windows srp

 

The SRP driver uses the maximum of number of SGEs that can fit into an
ItoT IU size or 17.  This in at least 64K I/O size maximum.  The driver
could be modified to increase the minimum size from 17 to some higher
number - I think it's just a compile-time constant in one of the
headers.

 

-Fab

 

From: ofw-bounces at lists.openfabrics.org
[mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Michael Di
Domenico
Sent: Wednesday, April 18, 2007 7:29 AM
To: ofw at lists.openfabrics.org
Subject: [ofw] windows srp

 

Is it possible to change the default block IO sizes for SRP sending data
to native infiniband storage devices running under windows?

 

The application is requesting large block IO, but SRP seems to be
chunking the data down to smaller blocks.

 

Thanks

- Michael

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