I need to deliver a presentation on programming in MPI. I need to add a segment on how MPI works under the hood. For Example What happens when I call MPI_Init?
Do you know of any good source from where I can learn these details?
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I need to deliver a presentation on programming in MPI. I need to add a segment on how MPI works under the hood. For Example What happens when I call MPI_Init?
Do you know of any good source from where I can learn these details?
The MPI Spec contains the description of the knobs, sliders, and displays that are on the outside of the “black box” of each API.
The interior details of the black boxes will be implementation dependent…and will also depend on the interconnect (e.g. TCP, IBV, DAPL, etc), the OS (e.g. is the implementation using LSB, or native libraries, etc), and on many other factors to a lesser degree (e.g. message size thresholds will trigger different code paths, and so on). Using “strace” and “ltrace” on the a.out may provide some insight into the actual goings on inside the blackbox.
The best recommendation is to pick an open source implementation and examine the code to determine the internal details.