OpenCL performance vs OpenMP

Discussion created by rcloud on Aug 31, 2011
Latest reply on Aug 31, 2011 by rick.weber


Have there been any studies done camparing OpenCL performance to OpenMP?  Specifically I am interested in the overhead cost of launching threads with OpenCL, e.g., if one were to decompose the domain into a very large number of individual work items each run by a thread doing a small job versus heavier weight threads in OpenMP were the domain was decomposed into sub domains whose number equals the number of cores.
It seems that the OpenCL programming model is more targeted towards massively parallel chips, GPUs for instance rather than CPUs that have fewer but more powerful cores.  
Can OpenCL be an effective replacement for OpenMP?