[mvapich-discuss] Performance in MVAPICH2...

[Krishna Kandalla]

Hi Shucai,
         It is possible that the thread calling MPI_Comm_Accept can affect
the message-rate achieved by the other thread. Please note that
MPI_Comm_Accept is a blocking call and the calling thread will be required
to wait within the library for an in-bound connection request. We do have
mechanisms for allowing a thread to yield the lock (and the cpu), but it
might still limit the message-rate that you can achieve with your
communication-thread. Please let us know if you any other questions.

Thanks,
Krishna

On Thu, Jul 14, 2011 at 7:49 PM, shucai xiao <shucai at gmail.com> wrote:

> Hello, all
>
>
>
>                 If I use two threads in a process, one of them calls the
> MPI_Comm_accept to receive connection requests; and the other thread does
> data transfer with another process, will the transfer data rate be affected
> by the function MPI_Comm_accept?
>
>
>
> Thanks
>
>
>
> Shucai
>
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