Signed-off-by: Yang Rong <rong.r.y...@intel.com> --- docs/Beignet.mdwn | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/docs/Beignet.mdwn b/docs/Beignet.mdwn index 64d33dc..b0fea71 100644 --- a/docs/Beignet.mdwn +++ b/docs/Beignet.mdwn @@ -158,6 +158,18 @@ Supported Targets * 6th Generation Intel Core Processors "Skylake" and "Kabylake". * 5th Generation Intel Atom Processors "Broxten" or "Apollolake". +OpenCL 2.0 +---------- +From release v1.3.0, beignet support OpenCL 2.0. By default, OpenCL 2.0 support is disabled, you can enable it when cmake with option +-DENABLE_OPENCL_20=1. Please remember that to enable OpenCL 2.0, there are some dependencies. First, OpenCL 2.0 only support the targets +from Skylake, include Skylake, Kabylake and Apollolake. Then, only clang support all OpenCL 2.0 feature from 3.9. So to enable OpenCL 2.0, +you must update LLVM/clang to 3.9 or later. And also requeired libdrm at least 2.4.66. +After enable OpenCL 2.0, beignet complies with OpenCL 2.0 spec, but some OpenCL 2.0 features is simulated by software, there is no performance +gain, such as pipe and device queues, especially device queues. +If you build beignet with enable OpenCL 2.0 and your kernel don't use the OpenCL 2.0 features, please pass a build option -cl-std=CL1.2 for +performance, the OpenCL 2.0 uses more registers and has lots of long operations, which may hurt performance, and beignet will continue to improve +OpenCL 2.0 performance. + Known Issues ------------ -- 2.1.4 _______________________________________________ Beignet mailing list Beignet@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/beignet