Megampi hangs on multicore-linux-x86_64 with +CmiSleepOnIdle
Test case causing hang:
../../../bin/testrun ./pgm +p2 +vp4 +CmiSleepOnIdle Running command: ./pgm +p2 +vp4 +CmiSleepOnIdle
This hang only happens when the test is run on charity with "+CmiSleepOnIdle". It doesn't reproduce on other lab machines. It also doesn't reproduce on charity under gdb. For now I think we just remove +CmiSleepOnIdle from the autobuild TESTOPTS, take this issue of 6.9.0, and revisit it later.