Re: [Scst-devel] Performance impact of T10 PI support on the initiator

[Sebastian H. <he...@gm...>]

Vladislav Bolkhovitin wrote:
> Sebastian Herbszt wrote on 11/25/2015 02:00 PM:
> > Vladislav Bolkhovitin wrote:
> >> Regarding Emulex, hopefully, somebody from Emulex will answer those questions.
> > 
> > Unfortunately all @avagotech.com email addresses bounced. So lets try again
> > with @emulex.com.
> 
> Praveen, can you help Sebastian here?

Thanks for introducing Praveen. The @emulex.com addresses bounced too.

> >> Regarding QLogic, I recently tried T10-PI with the latest git driver and it worked well
> >> (after fixing this stack garbage issue recently reported here, of course). Can't say
> >> anything about performance, though, no way to check it on my current setup.
> > 
> > That's too bad because I am seeing performance degradation with LPe12002
> > connected to a non-scst target. Therefore I am looking for suggestions and
> > comparison.
> 
> Hmm, LPe12002 is not QLogic-made.

No - it's the Emulex card I am testing with.
 
> Just as reference, as far as I remember, previously we did not see any significant
> performance difference with the HW-offloaded Emulex T10-PI mode (i.e. tgt only).

Do you remember the adapter model?

> Vlad

Sebastian