Re: Emulate remote signals with MPI

In article <3j2ikeFnnu7oU1@xxxxxxxxxxxxxx>,
Georg Sauthoff <g_sauthof@xxxxxx> wrote:

>The question is: How efficient is MPI_Iprobe usually if
>there is no new message?

It is not so expensive if you don't call it too often. So it comes
down to how often you want to check, and whether or not there's a
good place in your code to insert the check.

For example, if checking once per second is adequate, you can easily
write a function which calls Iprobe up to once per second. Then you
can call this function very frequently during your computation and it
will keep the cost of Iprobing down.

-- greg
.

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