1 Reply Latest reply on Aug 8, 2015 2:39 AM by dipak

    Local memory barrier and work group size


      I have a work group of size 128. I can guarantee that for each of the four subsets of consecutive 32 work items,

      that all items in the subset hit a local memory barrier. But, across subsets, this may not be the case.


      Will this be a problem?  Do all 128 items need to hit the barrier?  What are the risks if not all them do?



      Subset 0:  0,1,2....31

      Subset 1: 32,33,....64


      Subset 3: 96,97....128