Hello, I'm trying to use Beignet driver to use OpenCL:
I have tested in on two platforms: Platform #1 i5-3470 with Intel® HD Graphics 2500 -------------------------------------------------------------------------- Some of clinfo output: Platform Profile: FULL_PROFILE Platform Version: OpenCL 1.2 beignet 1.3 Platform Name: Intel Gen OCL Driver Platform Vendor: Intel ... Local memory type: Global Local memory size: 65536 ... Unified memory for Host and Device: 1 ... Name: Intel(R) HD Graphics IvyBridge GT1 Vendor: Intel Device OpenCL C version: OpenCL C 1.2 beignet 1.3 Driver version: 1.3 I tested both beignet 1.2.1 and now recent 1.3 using Linux 4.4 The biggest issue is immediate graphical glitches I get when I start an OpenCL program including clinfo. So even when computation complete fine the GUI becomes unusable until reboot. ------------------------------------------------------------- Platform #2 i5-6600 with Intel® HD Graphics 530 Works OK but significantly slower than using same GPU under Windows with Intel OpenCL drivers. The biggest hit that I see in profiling comes from reduction - use of local memory is very slow: I see same: ----------- Local memory type: Global -------- On beignet 1.2.1 - using Global memory for local simulation gives significant performance reduction and makes the performance mush slower for comparable CPU implementation On Windows OpenCL implementation I see that the Local memory type is Local and performance is much better. Question: 1. Is there any fix for graphical glitches that occur? 2. Is there a way to enable Local memory support as LOCAL memory and not Global. Thanks, Artyom _______________________________________________ Beignet mailing list Beignet@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/beignet
