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← What If P Is Too Big Or Small - Intro to Parallel Programming

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Showing Revision 4 created 05/24/2016 by Udacity Robot.

  1. The answer, too big: If P has more threads than a thread block is allowed to have,
  2. then we can't use shared memory to share data among all P threads,
  3. because we have to distribute that tile across multiple thread blocks.
  4. Another consideration is making sure that we have at least as many thread blocks as SMs
  5. or else SMs will sit idle.