{"id":4912,"date":"2026-01-12T10:26:41","date_gmt":"2026-01-12T02:26:41","guid":{"rendered":"https:\/\/www.caiqinyi.cn\/?p=4912"},"modified":"2026-01-12T10:26:41","modified_gmt":"2026-01-12T02:26:41","slug":"dispatch_ids","status":"publish","type":"post","link":"https:\/\/www.caiqinyi.cn\/index.php\/2026\/01\/12\/dispatch_ids\/","title":{"rendered":"Dispatch IDs"},"content":{"rendered":"<p><script type=\"text\/javascript\" async src=\"https:\/\/www.caiqinyi.cn\/wp-content\/MathJax\/MathJax.js?config=TeX-AMS_CHTML\">\n<\/script><br \/>\n<script type=\"text\/x-mathjax-config\">\n    MathJax.Hub.Config({\n        tex2jax: {inlineMath: [['$','$']]},\n        TeX: {equationNumbers: {autoNumber: [\"AMS\"], useLabelIds: true}},\n        \"HTML-CSS\": {linebreaks: {automatic: true}},\n        SVG: {linebreaks: {automatic: true}}\n    });\n<\/script><\/p>\n<p>\u6700\u8fd1\u5f00\u59cb\u5728\u7814\u7a76GPU Marching Cube\u76f8\u5173\u7684Compute Shader\u903b\u8f91, \u5176\u4e2d\u5b58\u5728\u5c06SV_DispatchThreadID\u7c7b\u578b\u7684\u6570\u636e\u8f6c\u5316\u4e3aCube\u6570\u91cf\u7684\u8fd0\u7b97, \u7531\u4e8e\u76ee\u524d\u5bf9Compute Shader\u4e2d\u7684\u5404\u79cd\u5185\u7f6e\u8bed\u4e49\u503c\u7684\u5de5\u4f5c\u539f\u7406\u4e86\u89e3\u5f97\u4e0d\u591f, \u6545\u5bf9\u8be5\u8f6c\u5316\u59cb\u7ec8\u672a\u80fd\u6709\u4e00\u4e2a\u6e05\u6670\u7684\u7406\u89e3. \u6070\u5de7\u4e5f\u53d1\u73b0\u4e00\u7bc7\u4e0d\u9519\u7684\u5173\u4e8eCompute Shader\u4e2dDispatch IDs\u7684\u82f1\u6587\u535a\u5ba2, \u7279\u4ee5\u672c\u6587\u7ffb\u8bd1\u5b66\u4e60\u4e00\u6ce2~<\/p>\n<p><!--more--><\/p>\n<p><strong>\u53c2\u8003\u6750\u6599<\/strong><br \/>\n1. <a href=\"https:\/\/www.jeremyong.com\/graphics\/2023\/08\/26\/dispatch-ids-and-you\/\">Dispatch IDs and you<\/a><br \/>\n2. <a href=\"https:\/\/zhuanlan.zhihu.com\/p\/390868528\">Compute Shader \u53c2\u6570\u542b\u4e49\u603b\u7ed3<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.caiqinyi.cn\/wp-content\/uploads\/2026\/01\/threadgroupids.png\" alt=\"\" width=\"666\" height=\"615\" class=\"aligncenter size-full wp-image-4914\" srcset=\"https:\/\/www.caiqinyi.cn\/wp-content\/uploads\/2026\/01\/threadgroupids.png 666w, https:\/\/www.caiqinyi.cn\/wp-content\/uploads\/2026\/01\/threadgroupids-300x277.png 300w\" sizes=\"(max-width: 666px) 100vw, 666px\" \/><\/p>\n<p>\u53ef\u4ee5\u5728\u5404\u79cd\u53d8\u91cfSV_*\u7684Win32\u6587\u6863\u9875\u9762\u4e0a\u627e\u5230\u8fd9\u5f20\u56fe\u7247, \u4f8b\u5982<a href=\"https:\/\/learn.microsoft.com\/en-us\/windows\/win32\/direct3dhlsl\/sv-dispatchthreadid\">\u6b64\u9875\u9762<\/a>.<br \/>\n$\\\\$ \u5982\u679c\u4e0d\u719f\u6089\u7684\u8bdd, \u5f88\u5bb9\u6613\u6df7\u6dc6\u4f55\u65f6\u8be5\u4f7f\u7528\u54ea\u4e2a\u8bed\u4e49\u503c. \u6700\u91cd\u8981\u7684\u662f\u8bb0\u4f4fSV_GroupID\u548cSV_GroupIndex\u7684\u547d\u540d\u5b58\u5728\u8bef\u5bfc\u6027(\u6216\u81f3\u5c11\u662f\u547d\u540d\u4e0d\u4e00\u81f4\u7684\u95ee\u9898). \u53ef\u7528\u7684Compute Shader\u8bed\u4e49\u5982\u672c\u6587\u7ed3\u5c3e\u5904\u7684\u603b\u7ed3\u8868\u683c\u6240\u793a.<\/p>\n<p><strong>1. Compute Shader\u8bed\u4e49<\/strong><\/p>\n<p>\u6211\u4eec\u9700\u8981\u8003\u8651\u4e09\u4e2aID:<br \/>\n$\\\\$ $\\cdot$ SV_DispatchThreadID<br \/>\n$\\\\$ $\\cdot$ SV_GroupThreadID<br \/>\n$\\\\$ $\\cdot$ SV_GroupID<br \/>\n$\\\\$ \u56de\u60f3\u4e00\u4e0b, \u8ba1\u7b97\u8c03\u5ea6\u7684\u7ed3\u6784\u5206\u4e3a\u4e24\u4e2a\u5c42\u7ea7(\u6682\u65f6\u5ffd\u7565WaveSize\u7684\u6982\u5ff5). \u9996\u5148, \u7ebf\u7a0b\u4f1a\u88ab\u7ec4\u7ec7\u6210\u7ebf\u7a0b\u7ec4. \u6bcf\u4e2a\u7ebf\u7a0b\u7ec4\u7684\u5927\u5c0f\u7531\u9644\u52a0\u5728Compute Shader\u5165\u53e3\u70b9\u4e0a\u7684numthreads\u5c5e\u6027\u7684\u4e09\u4e2a\u53c2\u6570\u6307\u5b9a. \u8fd9\u4e9b\u7ebf\u7a0b\u7ec4\u672c\u8eab\u5219\u901a\u8fc7\u8c03\u7528Dispatch\u5728\u4e3b\u673a\u7aef\u542f\u7528, \u8fd9\u6784\u6210\u4e86\u5c42\u7ea7\u7ed3\u6784\u7684\u4e0a\u5c42. \u7ebf\u7a0b\u7ec4\u5185\u7684\u7ebf\u7a0b\u6570\u91cf\u4e0e\u8c03\u5ea6\u7684\u7ebf\u7a0b\u7ec4\u6570\u91cf\u662f\u76f8\u4e92\u72ec\u7acb\u7684.<br \/>\n$\\\\$ \u56e0\u6b64, \u5982\u679c\u5165\u53e3\u51fd\u6570\u58f0\u660e\u5982\u4e0b\u6240\u793a:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"HLSL\" data-enlighter-theme=\"monokai\">\r\n\r\n[numthreads(5, 5, 1)]\r\nvoid main();\r\n\r\n<\/pre>\n<p>\u90a3\u4e48\u7ebf\u7a0b\u7ec4\u7684\u603b\u5927\u5c0f\u5c06\u662f25\u4e2a\u7ebf\u7a0b, \u5206\u5e03\u5728$5 \\times 5 \\times 1$\u7684\u6982\u5ff5\u6027\u4e09\u7ef4\u7a7a\u95f4\u4e2d, \u8be5\u7a7a\u95f4\u4e2d\u7684\u6bcf\u4e2a\u5355\u5143\u683c\u90fd\u5bf9\u5e94\u4e00\u4e2a\u72ec\u7acb\u7684\u7ebf\u7a0b\u6216\u8c03\u7528\u5b9e\u4f8b. \u7ebf\u7a0b\u7ec4\u5185\u7ebf\u7a0b\u7684\u5730\u5740\u7531SV_GroupThreadID\u503c\u6307\u5b9a, \u8be5\u503c\u662f\u4e00\u4e2auint3\u7c7b\u578b. \u5173\u952e\u7684\u662f, SV_GroupThreadID\u4e0e\u7279\u5b9a\u8c03\u5ea6\u4e2d\u5b58\u5728\u7684\u7ebf\u7a0b\u7ec4\u6570\u91cf\u5b8c\u5168\u65e0\u5173.<br \/>\n$\\\\$ \u76f8\u6bd4\u4e4b\u4e0b, SV_DispatchThreadID\u4e5f\u662f\u4e00\u4e2a\u7ebf\u7a0bID, \u56e0\u6b64\u6211\u4eec\u671f\u671b\u5b83\u7684\u503c\u80fd\u4ee5\u67d0\u79cd\u65b9\u5f0f\u6807\u8bc6\u4e00\u4e2a\u7ebf\u7a0b. \u8fd9\u91cc\u7684\u524d\u7f00Dispatch\u7ed9\u4e86\u6211\u4eec\u4e00\u4e2a\u63d0\u793a: SV_GroupThreadID\u6807\u8bc6\u7684\u662f\u7ebf\u7a0b\u7ec4\u4f5c\u7528\u57df\u5185\u7684\u7ebf\u7a0b, \u800cSV_DispatchThreadID\u6807\u8bc6\u7684\u662f\u6574\u4e2a\u8c03\u5ea6\u4f5c\u7528\u57df\u5185\u7684\u7ebf\u7a0b(\u5373\u5168\u5c40\u552f\u4e00\u7684\u7ebf\u7a0b\u6807\u8bc6).<br \/>\n$\\\\$ \u4f8b\u5982, \u5982\u679c\u6211\u4eec\u4ee5\u4e0a\u8ff0\u5165\u53e3\u51fd\u6570\u8c03\u7528Dispatch(3, 2, 4), \u603b\u5171\u4f1a\u8c03\u5ea6$3 \\times 2 \\times 4 = 24$\u4e2a\u7ebf\u7a0b\u7ec4, \u5bf9\u5e94$24 \\times 25 = 600$\u4e2a\u603b\u7ebf\u7a0b. \u6b64\u65f6SV_DispatchThreadID\u4f1a\u5728Shader\u6267\u884c\u671f\u95f4\u53d6\u5230600\u4e2a\u552f\u4e00\u503c. \u4e0e\u7ebf\u7a0b\u7ec4\u5185\u7684\u7ebf\u7a0b\u7c7b\u4f3c, \u8c03\u5ea6\u4e2d\u7684\u7ebf\u7a0b\u7ec4\u540c\u6837\u662f\u901a\u8fc7\u4e09\u7ef4\u5750\u6807\u5b9a\u4f4d\u7684. \u56e0\u6b64, \u5c06\u7ebf\u7a0b\u7ec4\u5730\u5740(\u7ec4ID) \u4e0e\u7ec4\u5185\u7ebf\u7a0b\u5730\u5740(\u7ec4\u7ebf\u7a0bID) \u7ec4\u5408\u8d77\u6765, \u5c31\u80fd\u7406\u89e3\u4e3a\u4f55SV_DispatchThreadID\u540c\u6837\u662fuint3\u7c7b\u578b(\u4e0eSV_GroupThreadID\u4e00\u81f4).<br \/>\n$\\\\$ \u8fd9\u8ba9\u6211\u4eec\u6765\u5230SV_GroupID\u7684\u5b9a\u4e49. \u987e\u540d\u601d\u4e49, \u4e0e\u7528\u4e8e\u6807\u8bc6\u7279\u5b9a\u4f5c\u7528\u57df\u5185\u7ebf\u7a0b\u7684SV_*ThreadID\u4e0d\u540c, SV_GroupID\u6807\u8bc6\u7684\u662f\u7ebf\u7a0b\u7ec4\u672c\u8eab. \u8fd9\u91cc\u7684\u4f5c\u7528\u57df\u6ca1\u6709\u660e\u786e\u8bf4\u660e, \u56e0\u4e3a\u5b9e\u9645\u4e0a\u53ea\u6709\u4e00\u79cd\u53ef\u80fd\u7684\u4f5c\u7528\u57df: SV_GroupID\u6807\u8bc6\u7684\u662f\u8c03\u5ea6\u4e2d\u7684\u7ebf\u7a0b\u7ec4. \u4f8b\u5982, \u5728\u8c03\u7528Dispatch(3, 2, 4)\u7684\u60c5\u51b5\u4e0b, SV_GroupID\u4f1a\u53d6\u503c\u4e8e24\u4e2a\u7ebf\u7a0b\u7ec4(\u6bcf\u4e2a\u7ec4\u5185\u5305\u542b$5 \\times 5 \\times 1$\u7684\u7ebf\u7a0b) \u6240\u6784\u6210\u7684\u4e09\u7ef4\u5750\u6807\u8303\u56f4(uint3\u7c7b\u578b). \u4e2a\u4eba\u8ba4\u4e3a\u8fd9\u4e2a\u547d\u540d\u5b58\u5728\u7f3a\u9677\u7684\u539f\u56e0\u662f: \u5c3d\u7ba1\u8be5ID\u7684\u4f5c\u7528\u57df\u662f\u660e\u786e\u7684(\u6bd5\u7adf\u5b83\u5fc5\u987b\u5c5e\u4e8e\u4e00\u6b21\u8c03\u5ea6), \u4f46\u5b83\u7684\u547d\u540d\u4e0e\u4e4b\u524d\u7684SV_GroupThreadID\u548cSV_DispatchThreadID\u4e0d\u4e00\u81f4. \u5982\u679c\u7b14\u8005\u662f\u8bbe\u8ba1\u8005, \u7b14\u8005\u4f1a\u66f4\u503e\u5411\u4e8e\u4f7f\u7528SV_DispatchGroupID\u8fd9\u6837\u7684\u547d\u540d, \u4ee5\u4fdd\u6301\u4e0e\u5176\u5b83\u4e24\u4e2a\u503c\u547d\u540d\u89c4\u5219\u7684\u7edf\u4e00\u6027. \u5982\u679c\u603b\u662f\u8bb0\u6df7\u8fd9\u4e9b\u6982\u5ff5, \u53ef\u4ee5\u5c1d\u8bd5\u5c06SV_GroupID\u7406\u89e3\u4e3aSV_DispatchGroupID, \u8fd9\u6837\u80fd\u6062\u590d\u4e0e\u5176\u5b83\u672f\u8bed\u4e4b\u95f4\u7684\u903b\u8f91\u4e00\u81f4\u6027.<br \/>\n$\\\\$ \u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u7406\u6e05\u4e86\u524d\u9762\u7684\u672f\u8bed, \u63a5\u4e0b\u6765\u8981\u8bb0\u4f4f\u6700\u540e\u4e00\u4e2a\u503c: SV_GroupIndex. \u4e0eSV_GroupID(\u5176\u503c\u6620\u5c04\u5230\u7ebf\u7a0b\u7ec4) \u4e0d\u540c, SV_GroupIndex\u7684\u503c\u6620\u5c04\u5230\u7ebf\u7a0b. \u5177\u4f53\u6765\u8bf4, SV_GroupIndex\u7684\u503c\u5bf9\u5e94\u7684\u662f\u7ec4\u5185\u7684\u7ebf\u7a0b. \u4ee5\u4e4b\u524d\u5e26\u6709[numthreads(5, 5, 1)]\u5c5e\u6027\u7684\u5165\u53e3\u51fd\u6570\u4e3a\u4f8b, SV_GroupIndex\u7684\u53d6\u503c\u8303\u56f4\u662f0\u523024(\u5305\u542b\u4e24\u7aef). \u8fd9\u4e2a\u547d\u540d\u5c24\u5176\u4ee4\u4eba\u8d39\u89e3: \u5c3d\u7ba1\u5b83\u63cf\u8ff0\u7684\u662f\u7ebf\u7a0b, \u4f46\u540d\u79f0\u4e2d\u5374\u5b8c\u5168\u6ca1\u6709\u51fa\u73b0Thread\u8fd9\u4e2a\u8bcd.<br \/>\n$\\\\$ \u9700\u8981\u6ce8\u610f\u7684\u662f, DirectX\u5e76\u672a\u63d0\u4f9bSV_DispatchIndex\u8fd9\u6837\u7684\u8bed\u4e49\u503c\u2014\u2014 \u7406\u8bba\u4e0a\u5b83\u5e94\u8be5\u662f\u4e00\u4e2a\u80fd\u6807\u8bc6\u6574\u4e2a\u8c03\u5ea6\u4e2d\u552f\u4e00\u7ebf\u7a0b\u5c55\u5e73\u540e\u7684\u7d22\u5f15(\u5373\u5168\u5c40\u552f\u4e00\u7684\u7ebf\u6027\u7d22\u5f15). \u5728Compute Shader\u4e2d, \u8fd9\u4e2a\u503c\u6709\u65f6\u975e\u5e38\u6709\u7528, \u4f46\u901a\u5e38\u9700\u8981\u5f00\u53d1\u8005\u81ea\u884c\u901a\u8fc7\u5c55\u5e73SV_GroupThreadID\u6765\u8ba1\u7b97. \u4f8b\u5982, \u82e5\u7ebf\u7a0b\u7684\u4e09\u7ef4\u5750\u6807\u4e3a$(x, y, z)$, \u4e14\u8c03\u5ea6\u7684\u603b\u7ef4\u5ea6\u4e3a$(dimX, dimY, dimZ)$, \u5219\u53ef\u4ee5\u901a\u8fc7\u516c\u5f0f:$$index = x + y \\times dimX + z \\times dimX \\times dimY$$\u5c06\u4e09\u7ef4\u5750\u6807\u8f6c\u6362\u4e3a\u4e00\u7ef4\u7d22\u5f15. \u8fd9\u79cd\u65b9\u5f0f\u80fd\u5e2e\u52a9\u5b9e\u73b0\u7c7b\u4f3cSV_DispatchIndex\u7684\u529f\u80fd.<\/p>\n<p><strong>2. \u603b\u7ed3<\/strong><\/p>\n<p>\u4ee5\u4e0b\u8868\u683c\u5c55\u793a\u4e86\u5404\u8bed\u4e49\u503c\u7684\u539f\u59cb\u540d\u79f0(\u5de6\u5217), \u529f\u80fd\u63cf\u8ff0(\u4e2d\u5217) \u4ee5\u53ca\u5efa\u8bae\u7684\u66f4\u540d(\u53f3\u5217). \u8fd9\u4e9b\u66f4\u540d\u4e3b\u8981\u4f5c\u4e3a\u8bb0\u5fc6\u8f85\u52a9\u5de5\u5177, \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b(\u5982\u547d\u540d\u5df2\u6e05\u6670\u65f6), \u539f\u59cb\u540d\u79f0\u4ecd\u53ef\u63a5\u53d7.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.caiqinyi.cn\/wp-content\/uploads\/2026\/01\/compute_shader_semantics_summary.png\" alt=\"\" width=\"670\" height=\"242\" class=\"aligncenter size-full wp-image-4928\" srcset=\"https:\/\/www.caiqinyi.cn\/wp-content\/uploads\/2026\/01\/compute_shader_semantics_summary.png 670w, https:\/\/www.caiqinyi.cn\/wp-content\/uploads\/2026\/01\/compute_shader_semantics_summary-300x108.png 300w\" sizes=\"(max-width: 670px) 100vw, 670px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u5f00\u59cb\u5728\u7814\u7a76GPU Marching Cube\u76f8\u5173\u7684Compute Shader\u903b\u8f91, \u5176\u4e2d\u5b58\u5728\u5c06SV_Di &hellip; <a href=\"https:\/\/www.caiqinyi.cn\/index.php\/2026\/01\/12\/dispatch_ids\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">Dispatch IDs<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,7],"tags":[],"_links":{"self":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/4912"}],"collection":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/comments?post=4912"}],"version-history":[{"count":15,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/4912\/revisions"}],"predecessor-version":[{"id":4929,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/4912\/revisions\/4929"}],"wp:attachment":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/media?parent=4912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/categories?post=4912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/tags?post=4912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}