OpenCL\u67b6\u6784\u53ef\u5206\u4e3a\u5e73\u53f0\u6a21\u578b\u3001\u6267\u884c\u6a21\u578b\u3001\u5b58\u50a8\u6a21\u578b\u548c\u7f16\u7a0b\u6a21\u578b\u3002<\/p>\n
2 MultiCL<\/h1>\n
OpenCL\u6807\u51c6\u8981\u6c42\u5f00\u53d1\u4eba\u5458\u5728\u7a0b\u5e8f\u7f16\u7801\u9636\u6bb5\u5c31\u786e\u5b9aOpenCL\u7a0b\u5e8f\u7684\u8c03\u5ea6\u65b9\u6848\uff0c\u4f7fOpenCL\u9762\u4e34\u8c03\u5ea6\u96be\u5ea6\u9ad8\u3001\u9002\u5e94\u6027\u5dee\u3001\u8d44\u6e90\u7ade\u4e89\u3001\u6548\u7387\u4f4e\u4e0b\u7b49\u95ee\u9898\u3002\u4e3a\u4e86\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898Ashwin M\u7b49\u4eba\u5728SunCL\u57fa\u7840\u4e0a\u8fdb\u4e00\u6b65\u5f00\u53d1\u7684OpenCL\u4efb\u52a1\u7ea7\u5e76\u884c\u8c03\u5ea6\u6846\u67b6\uff0c\u8be5\u6846\u67b6\u63d0\u4f9b\u4e86\u8de8\u5382\u5546\u7684OpenCL\u8fd0\u884c\u65f6\u652f\u6301\u3002MultiCL\u5b9e\u73b0\u4e86\u4e0a\u4e0b\u6587\u7ea7\u522b\u7684\u5168\u961f\u5217\u8c03\u5ea6\u548c\u9488\u5bf9\u7279\u5b9a\u547d\u4ee4\u961f\u5217\u7684\u672c\u5730\u8c03\u5ea6\u529f\u80fd\uff0c\u4f5c\u8005\u4ee5\u6b64\u4e3a\u57fa\u7840\u5b9e\u73b0\u4e86OpenCL\u4efb\u52a1\u7684\u52a8\u6001\u8c03\u5ea6\u3002
\nOpenCL\u5185\u6838\u8c03\u5ea6\u7b56\u7565\u53d6\u51b3\u4e8e\u7f16\u7a0b\u6a21\u578b\uff0c\u5f00\u53d1\u8005\u5fc5\u987b\u4e8b\u5148\u660e\u786e\u7a0b\u5e8f\u4e2d\u6240\u5305\u542b\u7684\u5185\u6838\u8c03\u5ea6\u7684\u65b9\u6848\uff0c\u4e3a\u4e86\u5b9e\u73b0OpenCL\u7684\u81ea\u9002\u5e94\u4efb\u52a1\u8c03\u5ea6\uff0cAshwin M\u7b49\u4eba\u5bf9OpenCL API\u8fdb\u884c\u4e86\u6269\u5c55\u3002\u88681\u63cf\u8ff0\u4e86MultiCL\u7684\u6269\u5c55\u5c5e\u6027\u3002<\/p>\n
\u88681 MultiCL\u6269\u5c55\u5c5e\u6027<\/p>\n
\n \u4e3a\u4e86\u8868\u8fbe\u5168\u5c40\u961f\u5217\u8c03\u5ea6\u673a\u5236\uff0cMultiCL\u6846\u67b6\u6269\u5c55\u4e86\u4e00\u4e2a\u65b0\u7684\u4e0a\u4e0b\u6587\u5c5e\u6027CL_CONTEXT_SCHEDULER\uff0c\u8be5\u6269\u5c55\u5c5e\u6027\u5b9e\u73b0\u4e86\u4e0a\u4e0b\u6587\u7ea7\u522b\u7684OpenCL\u81ea\u9002\u5e94\u8c03\u5ea6\uff0c\u91c7\u7528CL_CONTEXT_SCHEDULER\u521b\u5efa\u7684\u4e0a\u4e0b\u6587\uff0c\u8be5\u4e0a\u4e0b\u6587\u5173\u8054\u7684\u547d\u4ee4\u961f\u5217\u4e0eOpenCL\u8bbe\u5907\u89e3\u8026\u5408\uff0c\u5373\u521b\u5efaOpenCL\u547d\u4ee4\u961f\u5217\u662f\u4e0d\u7528\u6307\u5b9aOpenCL\u8bbe\u5907\uff0c\u4ece\u4e0a\u4e0b\u6587\u5c42\u9762\u89e3\u51b3\u4e86OpenCL\u5185\u6838\u8c03\u5ea6\u9700\u8981\u5728\u7f16\u7801\u9636\u6bb5\u5b8c\u6210\u7684\u95ee\u9898\u3002OpenCL\u4e0a\u4e0b\u6587\u5c5e\u6027\u5305\u542b\u4e24\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u5bf9\u5e94\u4e86\u4e24\u79cd\u5168\u5c40\u8c03\u5ea6\u7b56\u7565\uff1a\u5faa\u73af\u8c03\u5ea6\uff08ROUND_ROBIN\uff09\u548c\u81ea\u9002\u5e94\u8c03\u5ea6\uff08AUTO_FIT\uff09\u3002\u5faa\u73af\u8c03\u5ea6\u662f\u5728\u89e6\u53d1\u8c03\u5ea6\u7a0b\u5e8f\u65f6\uff0c\u5c06\u547d\u4ee4\u961f\u5217\u8c03\u5ea6\u5230\u4e0b\u4e00\u4e2a\u53ef\u7528\u8bbe\u5907\u4e0a\uff0c\u5728\u5b9e\u9645\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u7531\u4e8eGPU\u8bbe\u5907\u652f\u6301\u591a\u5185\u6838\u540c\u65f6\u6267\u884c\uff0c\u8be5\u65b9\u6848\u8c03\u5ea6\u65f6\u9009\u62e9\u8ba1\u7b97\u8d44\u6e90\u5145\u8db3\u7684\u8bbe\u5907\u8fdb\u884c\u8c03\u5ea6\uff0c\u8fd9\u79cd\u65b9\u6cd5\u4f1a\u6709\u6700\u5c0f\u7684\u8c03\u5ea6\u5f00\u9500\uff0c\u4f46\u662f\u5e76\u4e0d\u603b\u662f\u9009\u62e9\u6700\u4f73\u7684\u961f\u5217-\u8bbe\u5907\u6620\u5c04\u3002\u81ea\u52a8\u8c03\u5ea6\u7b56\u7565\u662fMultiCL\u6846\u67b6\u63d0\u51fa\u7684\u57fa\u4e8e\u5185\u6838\u9884\u6267\u884c\u7684\u52a8\u6001\u8c03\u5ea6\u7b56\u7565\uff0cMultiCL\u6846\u67b6\u5c06\u6839\u636e\u52a8\u6001\u8c03\u5ea6\u7b56\u7565\u9009\u62e9\u6700\u4f73\u7684\u961f\u5217-\u8bbe\u5907\u6620\u5c04\u3002<\/p>\n \u540c\u65f6\u4e3a\u4e86\u5b9e\u73b0\u672c\u5730\u8c03\u5ea6\u7b56\u7565\uff0c\u5bf9OpenCL API\u547d\u4ee4\u8c03\u5ea6\u961f\u5217\u5c5e\u6027\u8fdb\u884c\u4e86\u6269\u5c55\uff0c\u6dfb\u52a0\u4e86SCHED_AUTO__\u6216SCHED_OFF\uff0c\u5206\u522b\u786e\u5b9a\u7279\u5b9a\u7684\u961f\u5217\u662f\u9009\u62e9\u81ea\u52a8\u8c03\u5ea6\u6a21\u5f0f\u8fd8\u662f\u624b\u52a8\u8c03\u5ea6\u6a21\u5f0f\u3002MultiCL\u6846\u67b6\u7ed9\u7528\u6237\u63d0\u4f9b\u4e86\u9009\u9879\uff0c\u7528\u6237\u53ef\u4ee5\u9009\u7528SCHED_OFF\u6807\u5fd7\u624b\u52a8\u6307\u5b9a\u8c03\u5ea6\u65b9\u6848\uff0c\u7528\u6237\u4e5f\u53ef\u4ee5\u5728\u521b\u5efa\u547d\u4ee4\u961f\u5217\u65f6\u6dfb\u52a0SCHED_AUTO__\u6807\u5fd7\u6765\u5b9e\u73b0\u81ea\u52a8\u8c03\u5ea6\uff0c\u5176\u4e2d\u5305\u62ec\u9759\u6001\u8c03\u5ea6\uff08SCHED_AUTO_STATIC\uff09\u548c\u52a8\u6001\u8c03\u5ea6\uff08SCHED_AUTO_DYNAMIC\uff09\u3002\u9488\u5bf9\u547d\u4ee4\u961f\u5217\u5c5e\u6027\u7684\u4fee\u6539\u65e8\u5728\u4f5c\u4e3a\u8c03\u5ea6\u7684\u5fae\u8c03\u53c2\u6570\uff0c\u9488\u5bf9\u4e0d\u540c\u7a0b\u5ea6\u7684OpenCL\u5f00\u53d1\u4eba\u5458\uff0c\u5236\u5b9a\u4e86\u4e0d\u540c\u7a0b\u5ea6\u7684\u8c03\u5ea6\u7b56\u7565\u3002\u5bf9\u4e8e\u5177\u6709\u4e30\u5bcc\u7ecf\u9a8c\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u53ef\u4ee5\u76f4\u63a5\u5ffd\u7565MultiCL\u6846\u67b6\u63d0\u4f9b\u7684\u547d\u4ee4\u961f\u5217\u53c2\u6570\uff0c\u9009\u62e9\u624b\u52a8\u8c03\u5ea6\u6240\u6709\u961f\u5217\uff0c\u4fbf\u4e8e\u5f00\u53d1\u4eba\u5458\u6839\u636e\u5f02\u6784\u7cfb\u7edf\u5e95\u5c42\u7279\u70b9\u5b9e\u73b0\u4efb\u52a1\u5212\u5206\u548c\u5185\u6838\u4f18\u5316\uff0c\u5bf9\u4e8e\u4e2d\u7b49\u7ea7\u522b\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u5bf9\u5e95\u5c42\u67b6\u6784\u6709\u4e00\u5b9a\u4e86\u89e3\uff0c\u53ef\u6839\u636eOpenCL\u5185\u6838\u7684\u8d1f\u8f7d\u7c7b\u578b\uff08\u4f8b\u5982\uff1aSCHED_IO_BOUND\uff0c SCHED_COMPUTE_BOUND\u7b49\uff09\u9009\u62e9\u547d\u4ee4\u961f\u5217\u5c5e\u6027\u4f5c\u4e3a\u7cfb\u7edf\u7684\u8c03\u5ea6\u63d0\u793a\uff0c\u4fbf\u4e8eMultiCL\u6846\u67b6\u6839\u636eOpenCL\u5185\u6838\u7c7b\u578b\u63d0\u793a\u6784\u5efa\u5fae\u578b\u5185\u6838\u548c\u8fdb\u884c\u8c03\u5ea6\uff0c\u5bf9\u4e8e\u521d\u7ea7\u5f00\u53d1\u4eba\u5458\uff0c\u5219\u53ef\u4ee5\u91c7\u7528MultiCL\u6846\u67b6\u63d0\u4f9b\u7684\u81ea\u9002\u5e94\u52a8\u6001\u8c03\u5ea6\uff0c\u7531MultiCL\u8fd0\u884c\u65f6\u51b3\u5b9a\u5185\u6838\u8c03\u5ea6\u65b9\u6848\uff0c\u8be5\u65b9\u5f0f\u4f1a\u5e26\u6765\u4e00\u5b9a\u7684\u8fd0\u884c\u65f6\u5f00\u9500\u3002<\/p>\n MultiCL\u6269\u5c55\u7684clSetCommandQueueSchedProperty\u547d\u4ee4\u7528\u4e8e\u6807\u8bb0\u8c03\u5ea6\u7a0b\u5e8f\u533a\u57df\uff0c\u5e76\u53ef\u4ee5\u5728\u9700\u8981\u65f6\u8bbe\u7f6e\u66f4\u591a\u8c03\u5ea6\u7a0b\u5e8f\u6807\u5fd7\uff0c\u4f8b\u5982\u4f7f\u7528\u4ee5\u4e0b\u5c5e\u6027\uff1aSCHED_COMPUTE_BOUND\uff0cSCHED_MEM_BOUND\uff0cSCHED_IO_BOUND\u6216SCHED_ITERATIVE\u6307\u5b9a\u961f\u5217\u4e2d\u7684\u9884\u671f\u8ba1\u7b97\u7c7b\u578b\uff0c\u4e0eclCreateCommandQueue\u7684\u6269\u5c55\u53c2\u6570\u76f8\u5bf9\u5e94\uff0c\u8be5\u51fd\u6570\u4fbf\u4e8e\u8c03\u5ea6\u65b9\u6848\u4f18\u5316\u3002OpenCL\u5185\u6838\u542f\u52a8\u547d\u4ee4\u7684\u53c2\u6570\u5305\u62ec\u547d\u4ee4\u961f\u5217\uff0c\u5185\u6838\u5bf9\u8c61\u548c\u5185\u6838\u7684\u542f\u52a8\u914d\u7f6e\u3002MultiCL\u4e3a\u4e86\u81ea\u52a8\u8c03\u5ea6\u7684\u65b9\u4fbf\uff0c\u5b9e\u73b0\u4e86\u65b0\u7684OpenCL API\u547d\u4ee4clSetKernelWorkGroupInfo\uff0c\u7528\u4e8e\u8bbe\u5b9a\u5185\u6838\u914d\u7f6e\u53c2\u6570\uff0cMultiCL\u6846\u67b6\u5728OpenCL\u5185\u6838\u8c03\u5ea6\u547d\u4ee4\u52a0\u5165\u547d\u4ee4\u961f\u5217\u524d\u5c31\u53ef\u4ee5\u83b7\u53d6\u5185\u6838\u7684\u5de5\u4f5c\u7ec4\u548c\u5de5\u4f5c\u7ec4\u4e2d\u5de5\u4f5c\u9879\u4fe1\u606f\uff0c\u4fbf\u4e8eMultiCL\u6846\u67b6\u8fdb\u884c\u5185\u6838\u8c03\u5ea6\u3002<\/p>\n MultiCL\u8fd0\u884c\u65f6\u8bbe\u8ba1\u5982\u56fe1\u6240\u793a\u3002<\/p>\n \u4f7f\u7528SCHED_OFF\u6807\u5fd7\u521b\u5efa\u7684\u7528\u6237\u547d\u4ee4\u961f\u5217\u5c06\u9759\u6001\u6620\u5c04\u5230\u6240\u9009\u8bbe\u5907\uff08\u7531\u5f00\u53d1\u4eba\u5458\u5728\u7f16\u7801\u9636\u6bb5\u6307\u5b9a\u6620\u5c04\u65b9\u6848\uff09\uff0c\u800c\u4f7f\u7528SCHED_AUTO\u6807\u5fd7\u521b\u5efa\u7684\u547d\u4ee4\u961f\u5217\u5c06\u7531MultiCL\u81ea\u52a8\u8c03\u5ea6\u3002MultiCL\u6846\u67b6\u5c06OpenCL\u5185\u6838\u542f\u52a8\u547d\u4ee4\u52a0\u5165\u961f\u5217\u540e\uff0c\u5982\u679c\u8be5\u547d\u4ee4\u961f\u5217\u662fSCHED_OFF\u6807\u5fd7\u521b\u5efa\u7684\u547d\u4ee4\u961f\u5217\uff0c\u5219\u91c7\u7528\u9759\u6001\u8c03\u5ea6\u65b9\u6848\uff0cMultiCL\u8fd0\u884c\u65f6\u4fdd\u7559\u4e86SunCL\u8fd0\u884c\u65f6\u9759\u6001\u8c03\u5ea6\u65b9\u6848\u7684\u90e8\u5206\uff0c\u7ed9\u5f00\u53d1\u4eba\u5458\u4fdd\u7559\u4e86\u9759\u6001\u786c\u7f16\u7801\u8c03\u5ea6\u7684\u529f\u80fd\u3002\u5982\u679c\u8be5\u547d\u4ee4\u961f\u5217\u662f\u4ee5SCHED_AUTO\u6807\u5fd7\u521b\u5efa\u7684\uff0c\u5219\u4ea4\u7531\u81ea\u9002\u5e94\u8c03\u5ea6\u5668\u6620\u5c04\u5230\u8bbe\u5907\u6c60\u4e2d\u67d0\u4e00\u8bbe\u5907\u3002\u4e0a\u8ff0\u8c03\u5ea6\u8fc7\u7a0b\u5305\u542b\u4e86\u8bbe\u5907\u9759\u6001\u5206\u6790\uff08\u5728clGetPlatformIds\u8bfb\u53d6\u8bbe\u5907\u4fe1\u606f\u9636\u6bb5\u8fdb\u884c\uff09\uff0c\u5185\u6838\u9759\u6001\u5206\u6790\uff08clBuildProgram\uff0cclCreateProgramWithSource\u6784\u5efa\u7a0b\u5e8f\u9636\u6bb5\u8fdb\u884c\uff09\uff0c\u5185\u6838\u52a8\u6001\u5206\u6790\uff08clEnqueue*\u547d\u4ee4\u9636\u6bb5\uff09\u548c\u8bbe\u5907\u6620\u5c04\u3002MultiCL\u52a8\u6001\u8c03\u5ea6\u6a21\u5757\u901a\u8fc7\u72ec\u7acb\u7ebf\u7a0b\u4e0eOpenCL\u7a0b\u5e8f\u6267\u884c\u5e76\u53d1\u6267\u884c\uff0c\u5229\u7528OpenCL\u521d\u59cb\u5316\u9636\u6bb5\u5f00\u9500\u9690\u85cfMultiCL\u8fd0\u884c\u65f6\u5185\u6838\u5206\u6790\u548c\u8bbe\u5907\u5206\u6790\u5e26\u6765\u7684\u5f00\u9500\u3002<\/p>\n \n \u56fe1 MultiCL\u8fd0\u884c\u65f6\u7ed3\u6784\u56fe<\/strong><\/p>\n MultiCL\u52a8\u6001\u8c03\u5ea6\u5305\u542b\u4e09\u4e2a\u4e3b\u8981\u7684\u8fd0\u884c\u65f6\u6a21\u5757\uff1a\u8bbe\u5907\u5206\u6790\u5668\u3001\u5185\u6838\u5206\u6790\u5668\u548c\u4efb\u52a1\u8c03\u5ea6\u5668\u3002<\/p>\n \u8bbe\u5907\u5206\u6790\u5668\u662f\u5728OpenCL clGetPlatformIds\u547d\u4ee4\u8c03\u7528\u671f\u95f4\u6267\u884c\u7684\u8bbe\u5907\u6982\u8981\u5206\u6790\u5668\u3002\u8bbe\u5907\u5206\u6790\u5668\u4ece\u8bbe\u5907\u6982\u8981\u6587\u4ef6\u4e2d\u68c0\u7d22OpenCL\u8bbe\u5907\u7684\u6982\u8981\u4fe1\u606f\u3002\u5982\u679c\u6587\u4ef6\u4e2d\u4e0d\u5b58\u5728\u8be5\u8bbe\u5907\u7684\u6982\u8981\u4fe1\u606f\uff0c\u5219MultiCL\u8fd0\u884c\u65f6\u5c06\u8fd0\u884c\u6570\u636e\u5e26\u5bbd\u548c\u6307\u4ee4\u541e\u5410\u91cf\u57fa\u51c6\u6d4b\u8bd5\uff0c\u5e76\u5c06\u6d4b\u5f97\u7684\u6307\u6807\u4f5c\u4e3a\u9759\u6001\u4fe1\u606f\u5b58\u5165\u8bbe\u5907\u6982\u8981\u6587\u4ef6\u4e2d\u3002\u57fa\u51c6\u6d4b\u8bd5\u6e90\u4e8eSHOC\u57fa\u51c6\u6d4b\u8bd5NVIDIA SDK\uff0c\u8fd9\u4e9b\u57fa\u51c6\u6d4b\u8bd5\u662fMultiCL\u8fd0\u884c\u65f6\u7684\u4e00\u90e8\u5206\u3002\u4ec5\u5f53\u7cfb\u7edf\u914d\u7f6e\u53d1\u751f\u66f4\u6539\u65f6\uff08\u4f8b\u5982\uff0c\u5728\u7cfb\u7edf\u4e2d\u6dfb\u52a0\u65b0\u8bbe\u5907\u6216\u4ece\u4e2d\u5220\u9664\u8bbe\u5907\uff09\u65f6\uff0c\u624d\u9700\u8981\u518d\u6b21\u8fd0\u884c\u57fa\u51c6\u6d4b\u8bd5\u3002<\/p>\n 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<\/figure>\n<\/p>\n![\"OpenCL\u4efb\u52a1\u8c03\u5ea6\u57fa\u7840\u4ecb\u7ecd](\"https:\/\/www.nicekj.com\/wp-content\/uploads\/replace\/4a4208db49eca5456100b8c3187526f7.png\")
<\/figure>\n<\/p>\n\n
3 \u603b\u7ed3<\/h1>\n
\n