https://community.intel.com/t5/OpenCL-for-CPU/Intel-GPU-BARRIER-CLK-GLOBAL-MEM-FENCE-behaviour/m-p/936736#M1658 Can anyone please direct me to a documentation source on the intel Ivy Bridge GPU? Namely, I'm trying to figure out if BARRIER(CLK_GLOBAL_MEM_FENCE) will behave similarly to ADM or Nvidia devices. If there is an over-subscription of hardware threads will it draw a device deadlock with threads spinning on threads that cannot spawn reaching the barrier. TY for your help. Fri, 19 Apr 2013 18:17:07 GMT andradx 2013-04-19T18:17:07Z https://community.intel.com/t5/OpenCL-for-CPU/Intel-GPU-BARRIER-CLK-GLOBAL-MEM-FENCE-behaviour/m-p/936736#M1658 Can anyone please direct me to a documentation source on the intel Ivy Bridge GPU? Namely, I'm trying to figure out if BARRIER(CLK_GLOBAL_MEM_FENCE) will behave similarly to ADM or Nvidia devices. If there is an over-subscription of hardware threads will it draw a device deadlock with threads spinning on threads that cannot spawn reaching the barrier. TY for your help. Fri, 19 Apr 2013 18:17:07 GMT https://community.intel.com/t5/OpenCL-for-CPU/Intel-GPU-BARRIER-CLK-GLOBAL-MEM-FENCE-behaviour/m-p/936736#M1658 andradx 2013-04-19T18:17:07Z https://community.intel.com/t5/OpenCL-for-CPU/Intel-GPU-BARRIER-CLK-GLOBAL-MEM-FENCE-behaviour/m-p/936737#M1659 <P>If workitems within a workgroup follow the same path ( e.g. when your barrier is under <EM>if</EM>- clause), then no deadlock should occur by the best of my knowledge. All vendors follow the same OpenCL* pec so I suggest you rely on the specific description and recomendations from the OpenCL* standard as well.</P> Mon, 22 Apr 2013 07:18:00 GMT https://community.intel.com/t5/OpenCL-for-CPU/Intel-GPU-BARRIER-CLK-GLOBAL-MEM-FENCE-behaviour/m-p/936737#M1659 Maxim_S_Intel 2013-04-22T07:18:00Z