[mpich-discuss] Automatic reply: MPI_THREAD_MULTIPLE on Microsoft HPC platform

[Dmitriy Golovashkin]

Hi Fab,

> Other MPI vendors support MPI_THREAD_MULTIPLE on Windows too, for example
Intel MPI.  So while MSMPI doesn’t support MPI_THREAD_MULTIPLE, there’s
nothing to prevent it in the Microsoft HPC platform: you can configure your
cluster to use a different MPI library than MSMPI (e.g. MPICH2, Intel MPI,
Platform MPI, etc.)

Thank you very much for your detailed reply
I was very helpful!  (I did not know that Windows is so flexible and would
allow other MPI vendors
to coexist.  That's pretty powerful.)

Best regards,
Dmitriy.





On Thu, Mar 31, 2011 at 12:04 PM, Fab Tillier <ftillier at microsoft.com>wrote:

>  Hi Dmitriy,
>
>
>
> MSMPI doesn’t support MPI_THREAD_MULTIPLE today, but it’s on our list of
> features to consider in future releases.  We don’t yet have a concrete
> timeline for such support, though.  The feedback we’ve received in the past
> is that MPI_THREAD_MULTIPLE often regresses the MPI_THREAD_SERIALIZED model
> and applications can get better overall performance from having multiple
> MPI_THREAD_SERIALIZED applications rather than a single MPI_THREAD_MULTIPLE
> application.  This is the main reason we have been focusing on improving
> performance and scalability for the MPI_THREAD_SERIALIZED model.
>
>
>
> Note that MPICH2 is on a different development schedule, so they may well
> have MPI_THREAD_MULTIPLE support, and can run on Windows HPC Server.  Other
> MPI vendors support MPI_THREAD_MULTIPLE on Windows too, for example Intel
> MPI.  So while MSMPI doesn’t support MPI_THREAD_MULTIPLE, there’s nothing to
> prevent it in the Microsoft HPC platform: you can configure your cluster to
> use a different MPI library than MSMPI (e.g. MPICH2, Intel MPI, Platform
> MPI, etc.)
>
>
>
> Hopefully this helped,
>
> -Fab
>
>
>
> *From:* Dmitriy Golovashkin [mailto:golovashkin at gmail.com]
> *Sent:* Wednesday, March 30, 2011 3:09 PM
> *To:* Fab Tillier; Robert Palmer
> *Subject:* Fwd: Automatic reply: [mpich-discuss] MPI_THREAD_MULTIPLE on
> Microsoft HPC platform
>
>
>
> Folks,
>
> Is MPI_THREAD_MULTIPLE supported on
>     Windows Server 2008 R2  HPC 3.1.3267.0 ?
>
> Specifically MPI_Init_thread( ..., required, provided )
>
> for required = MPI_THREAD_MULTIPLE
> returns
> provided = MPI_THREAD_SERIALIZED
>
> Any plans to include support for MPI_THREAD_MULTIPLE in the future?
>
> Thank you!
>
> Kind regards,
> Dmitriy.
>
>
>
>  ---------- Forwarded message ----------
> From: *Eric Lantz (HPC)* <elantz at microsoft.com>
> Date: Wed, Mar 30, 2011 at 3:01 PM
> Subject: Automatic reply: [mpich-discuss] MPI_THREAD_MULTIPLE on Microsoft
> HPC platform
> To: Dmitriy Golovashkin <golovashkin at gmail.com>
>
>   
>
> Thank you for your message.
>
>
>
> However, I'm on vacation from Wednesday (Mar29) through Friday  (Apr1) -
> with little or no access to email.  Then I'll be attending the OpenFabrics
> Alliance Workshop in Monterey, CA from Sunday (Apr3) through Wednesday
> (Apr6).
>
> I'll be back on a normal work schedule starting Thursday (Apr7).
>
>
>
>
>
> For urgent NetworkDirect issues please contact Fab Tillier (
> ftillier at microsoft.com).
>
> For urgent MS-MPI or performance issues please contact Robert Palmer (
> robert.palmer at microsoft.com).
>
>
>
> My appologies for any inconvenience,
> Eric
>
>
>
>
>
>
>
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