[mpich-discuss] MPI_Send/MPI_Recv - getting delayed indeffinitely

[Madhawa Bandara]

Are you suggesting using non-blocking send/recv?

Sent from my Windows phone

-----Original Message-----
From: "Pavan Balaji" <balaji at mcs.anl.gov>
Sent: ‎12/‎26/‎2013 12:29
To: "discuss at mpich.org" <discuss at mpich.org>
Subject: Re: [mpich-discuss] MPI_Send/MPI_Recv - getting delayed indeffinitely


On Dec 25, 2013, at 8:50 PM, Madhawa Bandara <madawa911 at gmail.com> wrote:
> Thanks for the response. Actually I was using float as the data type in the program whereas MPI_DOUBLE is used in communication.. That has been the reason

Ok, great.

> Serializing means assigning a tag?

Not exactly.  Serializing is probably not the correct terminology here.

The problem is what I described in my response.  worker2 might send the message before worker1, in which case, it will have to wait for the master to receive worker1’s message and then process its message.  If it’s not causing performance degradation for you, don’t worry about it.

  — Pavan

--
Pavan Balaji
http://www.mcs.anl.gov/~balaji

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