Implement QD to automatically call `cmk::exit` when idle

[NK-Nikunj]

An empty charmlite program such as follows fails to run to completion with non-SMP (and potentially SMP) builds:

#include <charmlite/charmlite.hpp>

int main(int argc, char* argv[])
{
    cmk::initialize(argc, argv);

    {
        // Some code OR no code
    }

    cmk::finalize();

    return 0;
}

[jszaday]

It's a little awkward, but we require an explicit call to cmk::exit at the moment. We have not implemented QD to automatically detect when the runtime has processed all messages.

Subsequently, have you tried the following:

#include <charmlite/charmlite.hpp>

int main(int argc, char* argv[])
{
    // Initialize Converse and CharmLite 
    cmk::initialize(argc, argv);
    // Broadcast a message to all PEs to
    // start shutting down
    if (CmiMyNode() == 0) {
        cmk::exit();
    }
    // Then run the Converse scheduler
    // loop until it exits on this node
    cmk::finalize();
    return 0;
}

[NK-Nikunj]

cmk::exit does work in this situation. We may want to pin this issue until we get QD to automatically detect that there was no message created in the first place so we don't need an explicit call to cmk::exit.