[mvapich-discuss] configuring interfaces

[David Winslow]

Thank you for the quick response. I have a follow up question. Can we run
MVAPICH2 despite the message to use PSM (is it just a warning) or is it an
error and the execution actually stops?

The reason we are looking at using OFA-IB-CH3 is that the majority of
options or configuration parameters offered by MVAPICH2 are not offered for
the PSM interface such as MV2_USE_HUGEPAGES as well as many others. Is it
accurate to assume that if the user guide (section 11) doesn't explicitly
read that it supports PSM, then using the option has no impact on MVAPICH2
at runtime?

Thank you again.
David




On Tue, Aug 19, 2014 at 5:46 AM, Hari Subramoni <subramoni.1 at osu.edu> wrote:

> Hello David,
>
> Yes, MVAPICH2 configured with the CH3 interface can run over QLogic cards.
> However this may not lead to the best performance. The vendors of QLogic
> HCAs say that for best performance, one needs to use the PSM interface
> instead of the regular IB verbs interface with QLogic HCAs. That is why
> MVAPICH2 gives the error message.
>
> You can configure MVAPICH2 for the nemesis interface and then load any
> network module (netmod) you need. Please note that nemesis does not have
> support for PSM interface currently. Please refer to the following section
> of our userguide for more information on how to configure MVAPICH2 for the
> nemesis interface.
>
>
> http://mvapich.cse.ohio-state.edu/static/media/mvapich/mvapich2-2.0-userguide.html#x1-170004.9
>
> Regards,
> Hari.
>
>
> On Tue, Aug 19, 2014 at 12:32 AM, David Winslow <
> david.winslow at serendipitynow.com> wrote:
>
>> Team,
>> We are using Qlogic cards and MVAPICH 2.0 rc2.
>>
>> I have a couple of questions:
>>
>> 1. Can MVAPICH2 be configured to use CH3 interface even with QLogic cards
>> without getting an error at runtime? We've done this and get a runtime
>> error effectively saying we need to use PSM interface instead.
>>
>> 2. Can MVAPICH2 be configured with all of the interfaces and have the
>> preferred interface chosen at runtime with a switch or parameter?
>>
>>
>> Thank you
>> David
>>
>>
>> _______________________________________________
>> mvapich-discuss mailing list
>> mvapich-discuss at cse.ohio-state.edu
>> http://mailman.cse.ohio-state.edu/mailman/listinfo/mvapich-discuss
>>
>>
>
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