bject: Re: [OMPI users] Regarding eager limit relationship to send message
size
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An application that rely on MPI eager buffers for correctness or performance is
an incorrect application. Among many other points simply because MPI
implementations without support for eage
An application that rely on MPI eager buffers for correctness or
performance is an incorrect application. Among many other points simply
because MPI implementations without support for eager are legit. Moreover,
these applications also miss the point on performance. Among the overheads
I am not onl
On Mar 26, 2020, at 5:36 AM, Raut, S Biplab wrote:
>
> I am doing pairwise send-recv and not all-to-all since not all the data is
> required by all the ranks.
> And I am doing blocking send and recv calls since there are multiple
> iterations of such message chunks to be sent with synchronizati
(jsquyres)
Sent: Wednesday, March 25, 2020 10:22 PM
To: Open MPI User's List
Cc: George Bosilca ; Raut, S Biplab
Subject: Re: [OMPI users] Regarding eager limit relationship to send message
size
[CAUTION: External Email]
On Mar 25, 2020, at 4:49 AM, Raut, S Biplab via users
it to pass to the application in case I want to use it.
With Regards,
S. Biplab Raut
From: George Bosilca
Sent: Wednesday, March 25, 2020 9:58 PM
To: Raut, S Biplab
Cc: Open MPI Users
Subject: Re: [OMPI users] Regarding eager limit relationship to send message
size
[CAUTION: External Email
On Mar 25, 2020, at 4:49 AM, Raut, S Biplab via users
wrote:
>
> Let’s say the application is running with 128 ranks.
> Each rank is doing send() msg to rest of 127 ranks where the msg length sent
> is under question.
> Now after all the sends are completed, each rank will recv() msg from rest
would never deadlock.
George.
> With Regards,
>
> S. Biplab Raut
>
>
>
> *From:* George Bosilca
> *Sent:* Tuesday, March 24, 2020 9:01 PM
> *To:* Open MPI Users
> *Cc:* Raut, S Biplab
> *Subject:* Re: [OMPI users] Regarding eager limit relationship to send
> m
this size?
With Regards,
S. Biplab Raut
From: George Bosilca
Sent: Tuesday, March 24, 2020 9:01 PM
To: Open MPI Users
Cc: Raut, S Biplab
Subject: Re: [OMPI users] Regarding eager limit relationship to send message
size
[CAUTION: External Email]
Biplab,
The eager is a constant for each BTL, a
Biplab,
The eager is a constant for each BTL, and it represent the data that is
sent eagerly with the matching information out of the entire message. So,
if the question is how much memory is needed to store all the
eager messages then the answer will depend on the communication pattern of
your ap
