Posted by Wade Walker on Oct 29, 2014; 3:24pm
URL: https://forum.jogamp.org/How-to-get-CL-KERNEL-PREFERRED-WORK-GROUP-SIZE-MULTIPLE-tp4033302p4033467.html

For JOCL, it looks like the right way to get this is CLKernel.getWorkGroupInfo(), with a flag value of CLKernelBinding.CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE.