{"id":3451,"date":"2021-01-04T10:12:18","date_gmt":"2021-01-04T02:12:18","guid":{"rendered":"http:\/\/blog.coolcoding.cn\/?p=3451"},"modified":"2021-01-04T10:12:54","modified_gmt":"2021-01-04T02:12:54","slug":"ue%e9%ab%98%e7%ba%a7%e6%80%a7%e8%83%bd%e5%89%96%e6%9e%90%e6%8a%80%e6%9c%af%e4%b9%8brhi","status":"publish","type":"post","link":"https:\/\/blog.coolcoding.cn\/?p=3451","title":{"rendered":"UE\u9ad8\u7ea7\u6027\u80fd\u5256\u6790\u6280\u672f\u4e4bRHI"},"content":{"rendered":"\n

\u539f\u6587\uff1ahttps:\/\/www.gameres.com\/853198.html<\/a><\/p>\n\n\n\n

\n\n\u57fa\u4e8eUE\u7684\u624b\u6e38\u5ba2\u6237\u7aef\u7684\u6027\u80fd\u4e3b\u8981\u7531\u8fd9\u4e03\u5927\u90e8\u5206\u6784\u6210\uff1aCPU\u903b\u8f91\u3001CPU\u6e32\u67d3\u3001\u56fe\u5f62API\uff08\u63d0\u4ea4\uff09\u3001GPU\u6e32\u67d3\u3001\u5185\u5b58\u3001\u5e26\u5bbd\u3001\u52a0\u8f7d\u65f6\u95f4\u3002\u8fd9\u51e0\u4e2a\u57fa\u672c\u5143\u7d20\u53c8\u4f1a\u5408\u529b\u884d\u751f\u51fa\u4e00\u4e9b\u65b0\u7684\u6027\u80fd\u6307\u6807\uff0c\u4f8b\u5982\u529f\u8017\uff08\u5f80\u5f80\u540cGPU\u8d1f\u8f7d\u548c\u5e26\u5bbd\u7d27\u5bc6\u76f8\u5173\uff09\u3002\u540c\u65f6\u8fd9\u4e03\u90e8\u5206\u53c8\u6784\u6210\u4e00\u4e2a\u95ed\u5408\u7684\u6728\u6876\uff0c\u6700\u957f\u7684\u4e00\u5757\u662f\u4e3b\u8981\u74f6\u9888\uff0c\u5e76\u4e14\u74f6\u9888\u53ef\u4ee5\u5728\u8fd9\u51e0\u5757\u8f6c\u79fb\u6d41\u52a8\u3002<\/p>\n\n\n\n

\u4f5c\u4e3a\u5f00\u53d1\u8005\uff0c\u6211\u4eec\u89e3\u51b3\u6027\u80fd\u95ee\u9898\u7684\u6b65\u9aa4\u4e00\u822c\u90fd\u662f\u6309\u7167\u505a\u6027\u80fd\u5256\u6790\u3001\u89e3\u8bfb\u7ed3\u679c\u3001\u5b9a\u4f4d\u95ee\u9898\u3001\u589e\u52a0\u5256\u6790\u4ee3\u7801\u3001\u4f18\u5316\u95ee\u9898\u3001\u91cd\u590d\u5256\u6790\u7684\u8fed\u4ee3\u8fc7\u7a0b\u6765\u6267\u884c\u3002\u800c\u9ad8\u6548\u51c6\u786e\u8be6\u7ec6\u7684\u5bf9\u6027\u80fd\u8fdb\u884c\u5256\u6790\u5f97\u5230\u7ed3\u679c\u662f\u7b2c\u4e00\u6b65\uff0c\u5728\u4efb\u4f55\u5f15\u64ce\u4e0a\uff0c\u53ea\u8981\u6211\u4eec\u80fd\u505a\u5230\u5728\u4efb\u610f\u65f6\u523b\u51c6\u786e\u7684\u83b7\u53d6\u60f3\u8981\u7684\u6027\u80fd\u5256\u6790\u7ed3\u679c\uff0c\u90a3\u4e48\u624d\u4f1a\u80f8\u6709\u6210\u7af9\u4e0d\u4f1a\u614c\uff0c\u8be5\u7cfb\u5217\u6587\u7ae0\u5c06\u5f52\u7eb3\u603b\u7ed3\u5728UE\u4e0b\u5bf9\u6bcf\u4e00\u6027\u80fd\u6307\u6807\u7684\u5256\u6790\u65b9\u6cd5\uff0c\u505a\u6df1\u5165\u5206\u6790\uff0c\u6211\u4eec\u9700\u8981\u5de5\u5177\u7684\u5e2e\u52a9\uff0c\u4e5f\u9700\u8981\u7a0b\u5e8f\u5458\u7406\u89e3\u5f15\u64ce\u5e76\u77e5\u9053\u5982\u4f55\u53bb\u7f16\u5199\u5408\u9002\u7684\u5256\u6790\u4ee3\u7801\u3002<\/p>\n\n\n\n

\u6700\u8fd1\u521a\u597d\u505a\u8fc7\u4e00\u8f6eRHI\u7ebf\u7a0b\u7684\u5256\u6790\uff0c\u7b2c\u4e00\u7bc7\u5c31\u4eceRHI\u5f00\u59cb\uff0c\u6211\u4f1a\u575a\u6301\u628a\u540e\u9762\u51e0\u7bc7\u5199\u4e0b\u53bb\u3002<\/p>\n\n\n\n

\u6e32\u67d3API\u74f6\u9888<\/strong><\/p>\n\n\n\n

\u6e32\u67d3API\u74f6\u9888\u662f3D\u624b\u6e38\u7684\u5e38\u89c1\u74f6\u9888\uff0c\u6211\u4eec\u5e38\u8bf4\u7684drawcall\u8fc7\u591a\u4e86\uff0c\u5361\u6e32\u67d3\u5c31\u662f\u6307\u7684\u5361\u5728\u8fd9\u91cc\uff0c\u5176\u5b9e\u8fd9\u4e2a\u5361\u6e32\u67d3\u5361\u7684\u662fCPU\u3002\u4e3a\u4ec0\u4e48drawcall\u4f1a\u5361\uff0c\u56e0\u4e3aCPU\u9700\u8981\u901a\u8fc7\u5bf9\u6e32\u67d3API\u7684\u8c03\u7528\u6765\u9a71\u52a8GPU\u505a\u4e8b\u60c5\uff0c1\u4e2adrawcall\u7684\u80cc\u540e\u662f\u4e00\u5806\u6e32\u67d3API\u7684\u8c03\u7528\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u5e38\u89c1\u7684drawcall\u8fc7\u7a0b\u3002<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u53ef\u4ee5\u770b\u5230\u4e3a\u4e86\u4e00\u6b21\u7ed8\u5236\uff081\u4e2adrawcall\uff09\uff0c\u8981\u8bbe\u7f6eshader\uff0c\u521b\u5efabuffer\u7b49\u7b49\uff0c\u8fd9\u4e9b\u76f8\u6bd4\u6700\u540e\u7684draw\u90a3\u4e00\u6b65\u6765\u8bf4\u90fd\u662f\u76f8\u5bf9\u66f4\u8d39\u65f6\u7684\u3002<\/p>\n\n\n\n

\u5f53\u6d4b\u8bd5\u53cd\u9988\u7ed9\u6211\u4eec\u5361drawcall\u7684\u65f6\u5019\uff0c\u4f5c\u4e3a\u7a0b\u5e8f\u6211\u4eec\u9700\u8981\u4e00\u79cd\u624b\u6bb5\u6765\u8861\u91cf\u51fa\u786e\u5207\u7684\u5f53\u524d\u505a\u54ea\u4e9bdrawcall\uff0c\u6216\u8005\u8bf4\u7ed8\u5236\u54ea\u4e9b\u4e1c\u897f\u66f4\u8017\uff0c\u6700\u597d\u662f\u7cbe\u786e\u5230\u8017\u5728\u7ed8\u5236\u54ea\u4e2a\u6a21\u578b\u7684\u54ea\u4e2aAPI\u8c03\u7528\u4e0a\uff0c\u6211\u4eec\u624d\u80fd\u771f\u6b63\u7684\u7ed9\u7f8e\u672f\u4e88\u4ee5\u4f18\u5316\u6307\u5bfc\u3002<\/p>\n\n\n\n

UE\u4e2d\u7cbe\u786e\u5b9a\u4f4dRHI\u74f6\u9888<\/strong><\/p>\n\n\n\n

\u5728UE\u4e2d\uff0cPC\u548candroid\u5e73\u53f0\u901a\u5e38\u6e32\u67d3API\u7684\u8c03\u7528\u4f1a\u653e\u5728\u4e00\u4e2a\u5355\u72ec\u7684\u7ebf\u7a0b\uff0c\u53eb\u505aRHI\u7ebf\u7a0b\uff0c\u8fd9\u4e2a\u7ebf\u7a0b\u4e13\u95e8\u8d1f\u8d23\u6e32\u67d3\u6307\u4ee4\u7684\u63d0\u4ea4\uff0c\u5373\u8c03\u7528\u663e\u5361\u7684API\u3002\u6211\u4eec\u5206\u6790\u6e32\u67d3\u63d0\u4ea4\u7684\u5361\u987f\u5c31\u662f\u8981\u5206\u6790\u8fd9\u4e2aRHI\u7ebf\u7a0b\u3002<\/p>\n\n\n\n

1.\u591a\u7ebf\u7a0b\u6e32\u67d3\u5de5\u4f5c\u6a21\u578b<\/strong><\/p>\n\n\n\n

\u4f46\u662fRHI\u7ebf\u7a0b\u4e0d\u662f\u5355\u72ec\u5b58\u5728\u7684\uff0c\u5b83\u9700\u8981\u540cGame\uff0cRender\u7ebf\u7a0b\u534f\u4f5c\uff0cRHI\u7684\u5361\u987f\u53ef\u80fd\u4e0d\u53ea\u662fRHI\u7684\u5361\u987f\uff0c\u9996\u5148\u9700\u8981\u6e05\u695aUE\u91cc\u9762RHI\u7ebf\u7a0b\u548c\u5176\u4ed6\u7ebf\u7a0b\u7684\u5de5\u4f5c\u6a21\u5f0f\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u8fd9\u91cc\u9762Game\u3001Render\u3001RHI\u3001GPU\u5206\u522b\u57284\u4e2a\u5e76\u884c\u7684\u5de5\u4f5c\u7ebf\u4e0a\uff0c\u6709\u8fd9\u6837\u51e0\u4e2a\u7279\u70b9\uff1a<\/p>\n\n\n\n

1.Game thread\u6700\u591a\u53ef\u4ee5\u7b49\u6e32\u67d3\u4e00\u5e27\uff0c\u4e5f\u5c31\u662f\u8bf4\u6e32\u67d3\u5982\u679c\u7b2cN\u5e27\u7684\u6e32\u67d3\u5728\u7b2cN+1\u5e27\u7684Game tick\u7ed3\u675f\u65f6\u8fd8\u6ca1\u6709\u5b8c\u6210\uff0c\u90a3\u4e48\u6e32\u67d3\u5c31\u4f1a\u628aGame\u5361\u4f4f\uff0cRender\u548cRHI\u4e0d\u4f1a\u6709\u5e27\u5ef6\u8fdf\u3002<\/p>\n\n\n\n

2.Game\u662fRender\u548cRHI\u7684\u6e90\u9a71\u52a8\u8005\uff0cGame\u7684\u5361\u987f\u53ef\u80fd\u4f1a\u5361\u4f4f\u6e32\u67d3\u3002<\/p>\n\n\n\n

3.Render\u8d1f\u8d23\u4ea7\u751fdrawcall\uff0cRHI\u8d1f\u8d23\u63d0\u4ea4drawcall\uff0c\u56e0\u6b64Render\u7684\u5361\u987f\u4e5f\u53ef\u80fd\u5361\u4f4fRHI\u63d0\u4ea4\u3002<\/p>\n\n\n\n

4.\u6e32\u67d3\u7684\u6700\u540e\u4e00\u6b65\u8981swapbuffer\uff0c\u5373\u7b49\u5f85GPU\u5b8c\u6210\uff0c\u6240\u4ee5GPU\u7684\u5361\u987f\u4e5f\u53ef\u80fd\u4f1a\u5361\u4f4fRHI\u3002<\/p>\n\n\n\n

5.\u9664\u4e86Gamethread\u672c\u8eab\uff0cRender RHI\u548cGPU\u7684\u5de5\u4f5c\u90fd\u662f\u5b58\u5728\u95f4\u9699\u7684\uff0c\u5373Game\u903b\u8f91\u5582\u7ed9\u6e32\u67d3\u4efb\u52a1\u7684\u65f6\u673a\u4f1a\u5f71\u54cd\u6e32\u67d3\u5de5\u4f5c\u7684\u5bc6\u5ea6\uff0c\u4e5f\u4f1a\u5f71\u54cd\u5230\u6e32\u67d3\u7684\u65f6\u95f4\uff0c\u5c0f\u91cf\u591a\u6b21\u4f1a\u6d6a\u8d39\u6e32\u67d3\u6548\u7387\u3002<\/p>\n\n\n\n

2.UE\u4e2dRHI\u7684\u74f6\u9888\u6765\u6e90<\/strong><\/p>\n\n\n\n

\u73b0\u5728\u6211\u4eec\u77e5\u9053RHI\u7684\u5361\u987f\u53ef\u80fd\u6765\u81ea\u4e8e\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n

a.RHI\u6307\u4ee4\u81ea\u8eab\u7684\u5361\u987f\uff0c\u5373\u901a\u5e38\u6240\u8bf4\u7684\u5361drawcall\uff0c\u8fc7\u591a\u7684dc\uff0c\u8fc7\u591a\u7684\u6e32\u67d3\u72b6\u6001\u5207\u6362\uff0c\u8fc7\u591a\u7684\u6e32\u67d3\u8d44\u6e90\u521b\u5efa\uff0c\u7b49\u7b49\uff1b<\/p>\n\n\n\n

b.Game\u6216\u8005Render thread\u7684\u5361\u987f\uff1b<\/p>\n\n\n\n

c.GPU\u7684\u5361\u987f\u3002<\/p>\n\n\n\n

\u5bf9\u4e8e\u60c5\u51b5b\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7UE\u7684status\u770b\u5f53\u524d\u7684Game\u548cRender\u7684\u7ebf\u7a0b\u6267\u884c\u65f6\u95f4\u6765\u5bb9\u6613\u7684\u5224\u65ad\u51fa\u6765\uff0c\u6765\u6392\u9664\u662fRHI\u4e0a\u51fa\u4e86\u95ee\u9898\u3002<\/p>\n\n\n\n

\u5bf9\u4e8e\u60c5\u51b5c\uff0cUE\u7684status\u4e2d\u5728RHI\u7ebf\u7a0b\u4e0a\u4f1a\u7edf\u8ba1\u4e00\u4e2a\u53eb\u505aswapbuffer\u7684\u65f6\u95f4\uff0c\u5982\u679c\u8fd9\u4e2a\u65f6\u95f4\u8fc7\u957f\uff0c\u90a3\u4e48\u5c31\u662fGPU\u74f6\u9888\u4e86\u3002<\/p>\n\n\n\n

\u771f\u6b63\u6bd4\u8f83\u9ebb\u70e6\u7684\u662f\u5b9a\u4f4d\u60c5\u51b5a\uff0c\u5373\u5bf9\u4e8eRHI\u6307\u4ee4\u672c\u8eab\u7684\u5361\u987f\u74f6\u9888\u3002\u5bf9\u4e8e\u8fd9\u79cd\u60c5\u51b5UE\u81ea\u5e26\u7684stat\u5de5\u5177\u901a\u5e38\u4e0d\u80fd\u7ed9\u51fa\u6bd4\u8f83\u6709\u529b\u7684\u5206\u6790\u7ed3\u679c\uff0c\u81ea\u5e26\u7684\u65b9\u6cd5\u53ea\u80fd\u7edf\u8ba1\u4e00\u5e27\u5728RHI\u4e0a\u505a\u51e0\u79cd\u7ed9\u5b9a\u64cd\u4f5c\u7684\u65f6\u95f4\uff0c\u4f46\u662f\u5728\u590d\u6742\u7684\u7ebf\u7a0b\u6761\u4ef6\u4e0b\uff0c\u6709\u65f6\u5f88\u96be\u786e\u5b9a\u8fd9\u4e9b\u5361\u987f\u7684\u5e55\u540e\u539f\u56e0\uff0c\u6709\u65f6RHI\u95ee\u9898\u53ea\u662f\u4e00\u4e2a\u8868\u8c61\uff0c\u4e3a\u4e86\u5f97\u5230rhi\u7ebf\u7a0b\u74f6\u9888\u7684\u786e\u5207\u539f\u56e0\uff0c\u6211\u4eec\u81f3\u5c11\u8981\u80fd\u591f\u660e\u786e\u4ee5\u4e0b\u51e0\u4e2a\u4e8b\u60c5\uff1a<\/p>\n\n\n\n

1.RHI\u7ebf\u7a0b\u7684\u6267\u884c\u662f\u7531\u4e00\u5806\u6709\u5e8f\u7684RHI command\u7ec4\u6210\u7684\uff0c\u6211\u4eec\u8981\u80fd\u6355\u6349\u5230\u5177\u4f53\u7684\u90a3\u4e00\u4e2aRHI command\u7684\u6267\u884c\u65f6\u95f4\u6bd4\u8f83\u957f\uff0c\u6bd4\u5982\u662f\u521b\u5efa\u573a\u666f\u4e2d\u54ea\u4e2a\u623f\u5b50\u7684vb\uff1f<\/p>\n\n\n\n

2.\u662f\u5728Render thread\u7684\u54ea\u4e00\u4e2a\u6b65\u9aa4\u585e\u5165\u7684\u6e32\u67d3\u6570\u636e\u5bfc\u81f4\u4e86\u8fd9\u4e2aRHI command\u6267\u884c\u7684\u65f6\u95f4\u6bd4\u8f83\u957f\uff0c\u662f\u5728\u6e32\u67d3\u9634\u5f71\u7684\u65f6\u5019\uff0c\u8fd8\u662f\u6e32\u67d3basepass\uff0c\u8fd8\u662f\u505a\u906e\u6321\u5254\u9664\uff1f<\/p>\n\n\n\n

3.\u662f\u5728Game thread\u7684\u54ea\u4e00\u4e2a\u6b65\u9aa4\u585e\u5165\u7684\u6e32\u67d3\u6570\u636e\u5bfc\u81f4\u4e86\u8fd9\u4e2aRHI command\u6267\u884c\u7684\u65f6\u95f4\u6bd4\u8f83\u957f\uff1f\u662f\u5728\u52a0\u8f7d\u573a\u666f\uff1f\u8fd8\u662f\u5728\u7ed8\u5236UI\u7684\u65f6\u5019\uff1f<\/p>\n\n\n\n

\u7b14\u8005\u5728\u9879\u76ee\u4e2d\u9047\u5230\u8fc7\u4e00\u4e2a\u95ee\u9898\uff0c\u5728\u4e00\u4e9b\u4f4e\u7aef\u673a\uff0cRHI\u4f1a\u6709\u65f6\u7a81\u7136\u5361\u987f\u51e0\u79d2\u4ee5\u4e0a\uff0c\u770bstat\u6587\u4ef6\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u6211\u53ea\u80fd\u770b\u5230\u5728RHI\u7ebf\u7a0b\u7684Thcik begin\u9636\u6bb5\u53d1\u751f\u4e86\u5de8\u5927\u7684\u5361\u987f\uff0c\u7136\u540e\u5c31\u6ca1\u6709\u7ec6\u8282\u4e86\uff0c\u4e0d\u77e5\u9053\u662f\u5177\u4f53\u54ea\u4e2aRHI command\uff0c\u7136\u540e\u770bGame thread\u5728wait\uff0c\u4e5f\u4e0d\u77e5\u9053\u662fGame thread\u7684\u54ea\u4e00\u6b65\u89e6\u53d1\u4e86\u8fd9\u4e2aRHI\u74f6\u9888\u3002\u6211\u4eec\u9700\u8981\u4e00\u4e9b\u529e\u6cd5\u3002<\/p>\n\n\n\n

\u5b9a\u4f4dUE\u4e2dRHI\u7ebf\u7a0b\u7684\u74f6\u9888<\/strong><\/p>\n\n\n\n

\u6211\u4eec\u9700\u8981\u5206\u522b\u5c06\u4e0a\u9762\u4e09\u79cd\u539f\u56e0\u6355\u6349\u5230\uff0c\u5c31\u80fd\u89e3\u5f00\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n

\u9996\u5148\u5b9a\u4e49\u4e00\u4e2a\u5b8f\uff0c\u53ea\u6709\u6211\u4eec\u9700\u8981\u6355\u6349\u8fd9\u4e9b\u8be6\u7ec6\u7684RHI\u74f6\u9888\u65f6\u5f00\u542f\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u64cd\u4f5c\u4f1a\u5b58\u5728\u8f83\u5927\u7684overhead\u3002<\/p>\n\n\n\n

1.\u5b9a\u4f4d\u5177\u4f53RHI Command\u7684\u65f6\u95f4<\/strong><\/p>\n\n\n\n

\u5bf9\u4e8eRHI Command\u7684\u5177\u4f53\u6267\u884c\u65f6\u95f4\uff0c\u6211\u5728FRHICommand\u7684\u6700\u7ec8\u6267\u884c\u9636\u6bb5ExecuteAndDestruct\u4e2d\u521b\u5efa\u4e00\u4e2aFScopeCycleCounter\uff0ccounter\u7684\u540d\u5b57\u5c31\u76f4\u63a5rtti\u5f53\u524dcommand\u7684typename\u3002<\/p>\n\n\n\n

\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u66f4\u7ec6\u8282\u7684\u77e5\u9053\u8fd9\u4e2aCommand\u9664\u4e86\u7c7b\u578b\u5916\u7684\u4fe1\u606f\uff0c\u4f8b\u5982\u5982\u679c\u8fd9\u662f\u4e00\u4e2acreatevb\u7684Command\uff0c\u90a3\u4e48vb\u7684\u539f\u59cb\u6a21\u578b\u540d\u5b57\u662f\u4ec0\u4e48\uff0cvb\u5927\u5c0f\u7b49\uff0c\u6211\u5728\u4e00\u4e9bCommand\u5904\u989d\u5916\u4f20\u4e86\u4e00\u4e9bdebug\u7528\u7684string\uff0c\u7136\u540e\u5728\u8fd9\u4e9bCommand\u7684\u6267\u884c\u524d\u8865\u4e0a\u4e00\u4e2aFScopeCycleCounter\u3002\u8fd9\u6837\u6211\u4eec\u5c31\u80fd\u62ff\u5230\u7cbe\u786e\u5230\u5177\u4f53RHI ommand\u7684\u63d0\u4ea4\u8017\u65f6\u4e86\u3002\u7ecf\u8fc7\u8fd9\u4e2a\u8865\u5145\uff0c\u6211\u80fd\u62ff\u5230\u8fd9\u6837\u7684RHI\u7ebf\u7a0b\u6267\u884c\u65f6\u95f4\u7edf\u8ba1\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u8fd9\u6837\u8c1c\u5e95\u5c31\u6e05\u6670\u4e86\u5f88\u591a\uff0c\u539f\u6765\u8fd9\u65f6\u5019\u5b58\u5728\u5927\u91cf\u7684vb\u521b\u5efa\uff0c\u6570\u4e86\u4e00\u4e0b\uff0c\u6709\u51e0\u767e\u4e2a\uff0c\u5728\u540c\u4e00\u5e27\u5185\u51e0\u767e\u4e2avb\u7684\u521b\u5efa\uff0c\u5728\u4f4e\u7aefandroid\u4e0a\u4f1a\u4ea7\u751f5\u79d2\u949f\u7684\u8d85\u7ea7\u5361\u987f\uff0c\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0c\u4e3a\u4f55\u5728\u8fd9\u4e00\u5e27\u4f1a\u540c\u65f6\u4ea7\u751f\u8fd9\u4e48\u591a\u7684vb\u5361\u987f\uff0c\u662fGame\u6216\u8005Render\u4e0a\u53d1\u751f\u4e86\u4ec0\u4e48\u4e8b\u60c5\uff0c\u5982\u679c\u6211\u4eec\u67e5\u770b\u5f53\u524d\u7684Game thread\uff0c\u5b83\u663e\u793a\u7684\u662fwait\uff0c\u662f\u4e0d\u77e5\u9053\u539f\u56e0\u7684\uff0c\u56e0\u4e3aGame\uff0cRender\uff0cRHI\u662f\u5206\u5f00\u5de5\u4f5c\u7684\uff0c\u6211\u4eec\u73b0\u5728RHI\u5904\u4e8e\u74f6\u9888\u5df2\u7ecf\u4e0d\u662f\u4e8b\u6545\u7684\u201c\u7b2c\u4e00\u73b0\u573a\u201d\u4e86\uff0c\u6211\u4eec\u9700\u8981\u8fdb\u4e00\u6b65\u8ba9\u4f60\u53d1\u751f\u5728\u7b2c\u4e00\u73b0\u573a\u3002<\/p>\n\n\n\n

2.\u5b9a\u4f4d\u5728Render\u54ea\u4e2a\u9636\u6bb5\u53d1\u751f\u4e86RHI\u74f6\u9888<\/strong><\/p>\n\n\n\n

UE\u7684RHIcommandlist\u81ea\u5e26\u4e86\u4e00\u4e2a\u51fd\u6570FRHICommandListImmediate::SetCurrentStat\uff0c\u53ef\u4ee5\u7528\u6765\u8ba9Render\u7ed9RHI\u52a0\u4e00\u4e2a\u6807\u8bb0\uff0c\u8fd9\u4e2a\u6807\u8bb0\u5c31\u53ef\u4ee5\u8ba4\u4e3a\u662fRender\u7684\u67d0\u4e2a\u9636\u6bb5\u7684\u540d\u5b57\uff0cUE\u81ea\u5e26\u4e86\u5728Render\u7684\u5f88\u591a\u9636\u6bb5\u4e0b\u4e86\u8fd9\u4e2a\u6807\u8bb0\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u81ea\u5df1\u8865\u5145\uff0c\u8fd9\u4e2a\u51fd\u6570\u7684\u539f\u7406\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u8fd9\u4e2astatus\u672c\u8eab\u4e5f\u662f\u4ee5command\u7684\u5f62\u5f0f\u63d2\u5165\u961f\u5217\uff0c\u6240\u4ee5\u6bcf\u4e00\u6761RHI\u6267\u884c\u7684cmd\u4f1a\u88ab\u7edf\u8ba1\u5230\u5b83\u4e4b\u524d\u6700\u8fd1\u7684\u90a3\u4e2astatus tag\u4e0b\u9762\uff0c\u901a\u8fc7\u4e0d\u65ad\u7684\u7ec6\u5206\u63d2\u5165\u8fd9\u4e9btag\uff0c\u6211\u4eec\u53ef\u4ee5\u8ddf\u8e2a\u5230RHI\u7684cmd\u4ece\u662f\u5728Render\u7684\u54ea\u4e2a\u9636\u6bb5\u88ab\u4ea7\u751f\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\u8fd9\u4e2atag\u53ea\u80fd\u5728Render thread\u91cc\u63d2\u5165\u3002\u6211\u4e3aRender thread\u8865\u5145\u4e86\u4e00\u4e9b\u7ec6\u5316\u7684tag\u540e\uff0c\u5982\u524d\u9762\u7684\u56fe\uff0c\u6211\u53d1\u73b0\u8fd9\u4e2a\u5927\u91cf\u7684vb\u521b\u5efa\u53d1\u751f\u5728\u6e32\u67d3\u7ebf\u7a0b\u7684\u4e00\u5e27\u6e32\u67d3\u7ed3\u675f\u5230\u4e0b\u4e00\u5e27\u6e32\u67d3\u5f00\u59cb\u4e4b\u524d\uff0c\u5728\u8fd9\u4e2a\u9636\u6bb5\u6709Game\u903b\u8f91\u5f80Render\u91cc\u9762\u5806\u5165\u4e86\u5927\u91cf\u521b\u5efavb\u7684\u6307\u4ee4\uff0c\u6240\u4ee5\u95ee\u9898\u8fd8\u8981\u7ee7\u7eed\u5f80Game thread\u4e0a\u627e\u201c\u7b2c\u4e00\u73b0\u573a\u201d\u3002<\/p>\n\n\n\n

3.\u5b9a\u4f4d\u5728Game\u54ea\u4e2a\u9636\u6bb5\u4ea7\u751fRHI\u74f6\u9888<\/strong><\/p>\n\n\n\n

\u5176\u5b9e\u6211\u4eec\u4ecd\u7136\u53ef\u4ee5\u6a21\u4effRenderthread\u4e00\u6837\u5728Game thread\u4e0a\u7ed9RHI\u7684command list\u91cc\u9762\u63d2\u5165tag\uff0c\u4f46\u662f\u6709\u4e2a\u95ee\u9898\uff0cRenderthread\u662f\u4e00\u79cd\u76f8\u5bf9\u7b80\u5355\u7684Render command\u7684\u961f\u5217\u7684\u987a\u5e8f\u6267\u884c\uff0ctag\u91cf\u6709\u9650\u76f8\u5bf9\u5bb9\u6613\u64cd\u4f5c\uff0c\u4f46\u662fGame thread\u91cc\u9762\u903b\u8f91\u6781\u5176\u590d\u6742\uff0c\u6211\u4eec\u5e0c\u671b\u53ef\u4ee5\u590d\u7528Game thread\u4e0a\u9762\u5df2\u7ecf\u57cb\u597d\u7684\u4e00\u4e9bscope counter\uff0c\u4e0d\u8fc7Game\u548cRHI\u662f\u4e24\u6761\u5e76\u884c\u7684thread\uff0c\u9700\u8981\u5728\u6211\u4eec\u5173\u5fc3\u7684scope\u5904\u8ba9\u4e8c\u8005\u80fd\u591f\u5f3a\u884c\u540c\u6b65\u4f4f\uff0c\u624d\u80fd\u5bb9\u6613\u7684\u4f7f\u7528Game\u81ea\u5df1\u7684scope counter\u6293\u4f4fRHI\u7684\u6267\u884c\u3002\u6211\u4eec\u8fd9\u6837\u53bb\u5b9e\u73b0\uff0c\u5047\u8bbe\u4e0b\u9762\u662f\u6211\u4eec\u5173\u5fc3\u7684\u4e00\u4e2aGame thread\u7684\u533a\u6bb5\uff0c\u5728\u524d\u540e\u52a0\u4e0a\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n

#if STAT_RHI_ADVANCED\nFlushRenderingCommands(true)\n   DECLARE_SCOPE_CYCLE_COUNTER(TEXT(\"XXX\"), STAT_XXX, STATGROUP_RHI_GAME_SYNC);\n#endif\n  \/\/game \u4ee3\u7801\u6bb5\n    \u2026\n    \u2026\n\/\/\n#if STAT_RHI_ADVANCED\nFlushRenderingCommands(true);\n#endif<\/code><\/pre>\n\n\n\n
\u590d\u5236\u4ee3\u7801<\/em>
FlushRenderingCommands(true)\u7684\u610f\u601d\u662f\u5728\u8fd9\u4e2a\u4f4d\u7f6e\u5f3a\u5236\u5c06\u6240\u6709\u5f53\u524d\u7684RHIcommand\u6267\u884c\u5b8c\u6bd5\uff0c\u963b\u585e\u4f4f\u5f53\u524d\u7ebf\u7a0b\uff0c\u6240\u4ee5\u4e0a\u9762\u8fd9\u4e2a\u4ee3\u7801\u6bb5\u7684\u539f\u6709\u7684XXX\u7edf\u8ba1\u7684\u65f6\u95f4\u5c06\u5305\u62ec\u8fd9\u6bb5\u65f6\u95f4\u5185\u56e0\u4e3aGame thread\u4e0a\u53d1\u751f\u7684\u6e32\u67d3\u4e8b\u4ef6\u7684\u6e32\u67d3\u800c\u82b1\u8d39\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n
\u901a\u8fc7\u5728Game thread\u7684\u4e3b\u8981\u903b\u8f91\u5904\uff0c\u63d2\u5165\u8fd9\u4e9b\u540c\u6b65RHI\u7ebf\u7a0b\u7684\u4ee3\u7801\uff0c\u5f53RHI\u7ebf\u7a0b\u53d1\u751f\u74f6\u9888\u7684\u65f6\u5019\uff0c\u6211\u4eec\u53ea\u8981\u67e5\u770b\u5f53\u524dGamethread\u5728\u54ea\u91cc\u505c\u4f4f\uff08wait event\uff09\uff0c\u5c31\u53ef\u4ee5\u5224\u65ad\u662f\u4ec0\u4e48Game\u903b\u8f91\u5bfc\u81f4\u4e86RHI\u7ebf\u7a0b\u7684\u74f6\u9888\u3002\u6709\u4e86\u8fd9\u4e2a\u673a\u5236\uff0c\u6211\u4eec\u63a5\u7740\u622astat\u6587\u4ef6\uff0c\u4f1a\u770b\u5230\u5f53RHI\u5904\u4e8e\u5de8\u5927\u74f6\u9888\u65f6\uff0cGame thread\u505c\u5728\u4e86\u8fd9\u91cc\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u51f6\u624b\u88ab\u6293\u4f4f\u4e86\uff0c\u662f\u4e00\u4e2a\u8d44\u6e90\u6b63\u5728\u88ab\u7f13\u5b58\u6c60\u9884\u52a0\u8f7d\uff01<\/p>\n\n\n\n
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\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0c\u4e00\u4e2a\u8d44\u6e90\u7684\u52a0\u8f7d\u4e3a\u4f55\u4f1a\u5bfc\u81f4\u6d77\u91cf\u7684vb\u540c\u65f6\u521b\u5efa\uff1f\u901a\u8fc7\u8fdb\u4e00\u6b65\u7684\u5206\u6790\u4ee3\u7801\uff0c\u4f1a\u53d1\u73b0\u56e0\u4e3a\u8fd9\u91cc\u7528\u7684\u662f\u540c\u6b65\u52a0\u8f7d\uff0c\u800cUE\u7684\u540c\u6b65\u52a0\u8f7d\u7684\u673a\u5236\uff0c\u662f\u521b\u5efa\u4e00\u4e2a\u52a0\u8f7d\u4efb\u52a1\u5806\u5230\u540c\u5f02\u6b65\u52a0\u8f7d\u4e00\u6837\u7684\u52a0\u8f7d\u961f\u5217\u91cc\uff0c\u56e0\u4e3a\u4e0d\u80fd\u4fdd\u8bc1\u4f9d\u8d56\u5173\u7cfb\uff0c\u6240\u4ee5\u8981\u7b49\u5f85\u5f53\u524d\u6240\u6709\u961f\u5217\u4e2d\u7684\u4efb\u52a1\u5b8c\u6210\u624d\u80fd\u7ee7\u7eed\u4e0b\u53bb\uff0c\u4e5f\u5c31\u662f\u8bf4\u5f53\u524d\u7684\u540c\u6b65\u52a0\u8f7d\u7684\u65f6\u95f4\u7edd\u4e0d\u4ec5\u4ec5\u662f\u52a0\u8f7d\u5b8c\u4f60\u8981\u7684\u8fd9\u4e2a\u6a21\u578b\u800c\u5df2\uff0c\u4ed6\u9700\u8981\u5c06\u5f53\u524d\u5f02\u6b65\u52a0\u8f7d\u4efb\u52a1\u5728\u961f\u5217\u4e2d\u7684\u6240\u6709\u8d44\u6e90\u52a0\u8f7d\u5b8c\uff01\u800c\u8fd9\u4e2a\u65f6\u5019\u6070\u6070\u5904\u4e8e\u573a\u666f\u5728level streaming\u7684\u9636\u6bb5\uff0c\u6700\u540e\u53d1\u73b0\u6b64\u4e8b\u52a0\u8f7d\u961f\u5217\u4e2d\u7684\u8d44\u6e90\u4e0a\u767e\u4e2a\uff0c\u8fd9\u4e2a\u540c\u6b65\u52a0\u8f7d\u9047\u4e0alevel streaming\u7684\u7ed3\u679c\u5c31\u662f\uff0c\u5728\u8fd9\u4e00\u5e27\u8981\u5b8c\u6210\u4e0a\u767e\u4e2a\u6a21\u578b\u7684\u521b\u5efa\uff0c\u6a21\u578b\u7684postload\u4f1a\u521d\u59cb\u5316RHI\u8d44\u6e90\uff0c\u5bfc\u81f4\u4e00\u5e27\u5185\u5927\u91cfvb\u7684\u521b\u5efa\uff0c\u5361\u6b7bRHI\uff0c\u6240\u4ee5\u7f6a\u9b41\u7978\u9996\u662f\u540c\u6b65\u52a0\u8f7d\uff0c\u540c\u6b65\u52a0\u8f7d\u5c06level streaming\u7684\u8fc7\u7a0b\u4e5f\u5f3a\u884c\u540c\u6b65\u4e86\uff0c\u627e\u5230\u4e86\u95ee\u9898\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u76f8\u5173\u7684\u4f18\u5316\u624b\u6bb5\u6765\u6392\u9664\u8fd9\u4e2a\u74f6\u9888\u3002<\/p>\n\n\n\n
RHI\u4e0a\u7684\u95ee\u9898\u53ef\u80fd\u5f80\u5f80\u4e0d\u53ea\u662fRHI\u4e0a\u7684\u95ee\u9898\u90a3\u4e48\u7b80\u5355\uff0c\u901a\u8fc7\u4e0a\u9762\u8bf4\u7684\u4e00\u4e9b\u65b9\u6cd5\u6211\u4eec\u53ef\u4ee5\u6e05\u695a\u7684\u770b\u5230\u5404\u79cdRHI\u4e0a\u74f6\u9888\u7684\u771f\u6b63\u539f\u56e0\u3002\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"
\u539f\u6587\uff1ahttps:\/\/www.gameres.com\/853198.html \u57fa\u4e8eUE\u7684\u624b\u6e38\u5ba2\u6237\u7aef\u7684\u6027\u80fd\u4e3b\u8981\u7531 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=\/wp\/v2\/posts\/3451"}],"collection":[{"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3451"}],"version-history":[{"count":2,"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=\/wp\/v2\/posts\/3451\/revisions"}],"predecessor-version":[{"id":3460,"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=\/wp\/v2\/posts\/3451\/revisions\/3460"}],"wp:attachment":[{"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.coolcoding.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}