Advice about Barriers (1)

• It is very easy to reach deadlock if barriers are not handled correctly. PGENESIS tries to warn you by printing a message that it is waiting at a barrier.
• Examples of incorrect barrier usage:
  • Each node executes: barrier {mynode}
  • Each node executes: barrier@all
  • A single node executes: barrier@others; barrier; However: async barrier@others; barrier will work!

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