[Openib-windows] MTHCA perf issues

[Tzachi Dar]

The strange thing is indeed bandwidth falling from large messages. 
We have seen this on raw tests and we should certainly look at this to 
understand why this is happening.

Thanks
Tzachi

> -----Original Message-----
> From: openib-windows-bounces at openib.org 
> [mailto:openib-windows-bounces at openib.org] On Behalf Of Fabian Tillier
> Sent: Friday, June 09, 2006 8:46 AM
> To: Leonid Keller
> Cc: openib-windows at openib.org
> Subject: [Openib-windows] MTHCA perf issues
> 
> Hi Leo,
> 
> I just compared the performance of the MTHCA driver versus 
> the MT23108 driver, and things don't look so good.  I ran the 
> tests with WPP enabled in UAL and the MTHCA UVP.
> 
> For small messages, the latencies are the same as with the 
> MT23108 driver.  For larger messages, the bandwidth falls off 
> rapidly.  Until we have matching performance, I don't think 
> we can replace the MT23108 driver with MTHCA for Tavor and 
> Arbel-in-Tavor-mode devices.
> 
> Attached are the results for comparison.
> 
> - Fab
>