{"id":4970,"date":"2026-03-18T16:51:34","date_gmt":"2026-03-18T08:51:34","guid":{"rendered":"https:\/\/www.ihub1.com\/?p=4970"},"modified":"2026-03-18T16:52:47","modified_gmt":"2026-03-18T08:52:47","slug":"%e8%8b%b1%e4%bc%9f%e8%be%be%e6%9c%80%e5%bc%bab200%e7%ae%97%e5%8a%9b%e6%b5%aa%e8%b4%b960%ef%bc%81%e6%99%ae%e6%9e%97%e6%96%af%e9%a1%bf%e5%9b%a2%e9%98%9f%e5%87%ba%e6%89%8b%ef%bc%8c%e5%88%a9%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.ihub1.com\/index.php\/2026\/03\/18\/%e8%8b%b1%e4%bc%9f%e8%be%be%e6%9c%80%e5%bc%bab200%e7%ae%97%e5%8a%9b%e6%b5%aa%e8%b4%b960%ef%bc%81%e6%99%ae%e6%9e%97%e6%96%af%e9%a1%bf%e5%9b%a2%e9%98%9f%e5%87%ba%e6%89%8b%ef%bc%8c%e5%88%a9%e7%94%a8\/","title":{"rendered":"\u82f1\u4f1f\u8fbe\u6700\u5f3aB200\u7b97\u529b\u6d6a\u8d3960%\uff01\u666e\u6797\u65af\u987f\u56e2\u961f\u51fa\u624b\uff0c\u5229\u7528\u7387\u5347\u81f371%"},"content":{"rendered":"\t\t
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\u6240\u6709\u7528\u82f1\u4f1f\u8fbeBlackwell B200\u7684\u4eba\uff0c\u90fd\u5728\u82b1\u51a4\u6789\u94b1\uff1f\uff1f<\/p>

\u666e\u6797\u65af\u987f\u5927\u5b66\u7b49\u8054\u5408\u56e2\u961f\u6307\u51fa\uff0c\u8fd9\u6b3eGPU\u5c45\u7136\u56e0\u4e3a\u8f6f\u786c\u4ef6\u9002\u914d\u95ee\u9898<\/b>\u767d\u767d\u6d6a\u8d39\u4e8660%\u7684\u8ba1\u7b97\u8d44\u6e90<\/b>\u3002<\/p>

<\/div><\/figure>

\u7b97\u529b\u6d6a\u8d39\u4e86\uff0c\u548b\u529e\u5462\u2014\u2014FlashAttention-4<\/a><\/b>\u7ed9\u51fa\u4e86\u7b54\u6848\u3002<\/p>

\u8fd9\u6b3e\u4e13\u4e3aBlackwell\u67b6\u6784GPU\u91cf\u8eab\u6253\u9020\u7684\u6ce8\u610f\u529b\u7b97\u6cd5\uff0c\u4e00\u4e3e\u5c06\u5229\u7528\u7387\u4ece\u884c\u4e1a\u666e\u904d\u768420%-30%\u63a8\u81f371%<\/b>\u3002<\/p>

FlashAttention-4\u7531Tri Dao<\/a>\u9886\u8854\u3001\u643a\u624bMeta<\/a>\u3001Together AI<\/a>\u7b49\u56e2\u961f\u5171\u540c\u7814\u53d1\u3002<\/p>

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<\/div><\/figure>

Blackwell B200\u6709\u529b\u4f7f\u4e0d\u51fa<\/h2>

\u82f1\u4f1f\u8fbeBlackwell B200\u4f5c\u4e3a\u65b0\u4e00\u4ee3\u6570\u636e\u4e2d\u5fc3GPU\uff0c\u5176tensor core\u5f20\u91cf\u6838\u5fc3\u7b97\u529b\u8fbe\u52302.25 PFLOPS\uff0c\u662f\u4e0a\u4e00\u4ee3Hopper H100<\/a>\u76842\u500d\u3002<\/p>

\u7406\u8bba\u4e0a\u80fd\u8ba9\u6ce8\u610f\u529b\u8ba1\u7b97\u7684\u901f\u5ea6\u5b9e\u73b0\u8de8\u8d8a\u5f0f\u63d0\u5347\u3002<\/p>

\u4f46\u7406\u60f3\u5f88\u4e30\u6ee1\u2026\u2026<\/p>

\u8fd9\u6b3eGPU\u53d1\u751f\u4e86\u4e25\u91cd\u7684\u504f\u79d1\u3002<\/p>

\u6838\u5fc3\u7b97\u529b\u731b\u589e\u7684\u540c\u65f6\uff0c\u5173\u952e\u7684\u914d\u5957\u8ba1\u7b97\u5355\u5143\u5374\u539f\u5730\u8e0f\u6b65\u3002<\/p>

\u5176\u4e2d\uff0c\u8d1f\u8d23\u6307\u6570\u8fd0\u7b97\u7684MUFU\u5355\u5143<\/a>\u541e\u5410\u91cf\u4e0eHopper\u67b6\u6784\u5b8c\u5168\u4e00\u81f4\uff0c\u6ca1\u6709\u4efb\u4f55\u63d0\u5347\uff1b<\/p>

\u5171\u4eab\u5185\u5b58\u7684\u5e26\u5bbd\u4e5f\u4fdd\u6301\u539f\u6837\uff0c\u5e76\u672a\u8ddf\u968f\u5f20\u91cf\u6838\u5fc3\u540c\u6b65\u5347\u7ea7\u3002<\/p>

\u8fd9\u4e00\u786c\u4ef6\u8bbe\u8ba1\u7684\u4e0d\u5bf9\u79f0\u6027\uff0c\u76f4\u63a5\u5bfc\u81f4\u4e86\u6027\u80fd\u74f6\u9888\u7684\u53cd\u8f6c\u3002<\/p>

\u5728\u5927\u6a21\u578b\u6838\u5fc3\u7684\u6ce8\u610f\u529b\u8ba1\u7b97\u8d1f\u8f7d\u4e2d\uff0c\u539f\u672c\u7684\u6027\u80fd\u74f6\u9888\u77e9\u9635\u4e58\u6cd5\uff0c\u5982\u4eca\u8017\u65f6\u8fdc\u4f4e\u4e8e\u8f85\u52a9\u73af\u8282\uff0c\u5171\u4eab\u5185\u5b58\u7684\u8bfb\u5199\u64cd\u4f5c\u548c\u6307\u6570\u8fd0\u7b97\u7684\u8017\u65f6\uff0c\u53cd\u800c\u6bd4\u77e9\u9635\u4e58\u6cd5\u591a\u51fa25%-60%<\/b>\u3002<\/p>

\u7b97\u529b\u7ffb\u500d\u7684Tensor Core\u957f\u671f\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\uff0c\u5927\u91cf\u8ba1\u7b97\u8d44\u6e90\u5c31\u8fd9\u4e48\u88ab\u95f2\u7f6e\u4e86\u3002<\/p>

\u4e8e\u662f\uff0c\u5927\u91cf\u5f00\u53d1\u8005\u82b1\u8d39\u91cd\u91d1\u90e8\u7f72\u7684B200 GPU\uff0c\u56e0\u6838\u5fc3\u7b97\u529b\u4e0e\u914d\u5957\u5355\u5143\u7684\u8131\u8282\uff0c\u8d85\u516d\u6210\u8d44\u6e90\u88ab\u767d\u767d\u6d6a\u8d39<\/b>\u3002<\/p>

\u7b97\u529b\u7ffb\u500d\uff1f<\/p>

No\uff01\u660e\u660e\u662f\u6709\u529b\u4f7f\u4e0d\u51fa\u2026\u2026<\/p>

FlashAttention-4\u4e09\u62db\u7834\u89e3\u74f6\u9888<\/h2>

\u9488\u5bf9Blackwell GPU\u7684\u504f\u79d1\u95ee\u9898\uff0cFlashAttention-4\u91cf\u8eab\u6253\u9020\u4e86\u4e09\u5927\u4f18\u5316\u7b56\u7565\u3002<\/p>

<\/div><\/figure>

\u7b2c\u4e00\u62db\uff0c\u591a\u7ba1\u9f50\u4e0b\u5316\u89e3\u6307\u6570\u8fd0\u7b97\u4e0e\u5185\u5b58\u8bfb\u5199\u96be\u9898\u3002<\/p>

\u56e2\u961f\u4e00\u65b9\u9762\u901a\u8fc7\u8f6f\u4ef6\u6a21\u62df\u6307\u6570\u51fd\u6570<\/b>\uff0c\u501f\u52a9\u591a\u9879\u5f0f\u8fd1\u4f3c\u7684\u65b9\u6cd5\uff0c\u8ba9\u9ad8\u901f\u7684FMA\u8ba1\u7b97\u5355\u5143\u53c2\u4e0e\u5230\u539f\u672c\u7531MUFU\u5355\u5143\u8d1f\u8d23\u7684\u6307\u6570\u8fd0\u7b97\u4e2d\uff0c\u5927\u5e45\u63d0\u5347\u6307\u6570\u8ba1\u7b97\u7684\u541e\u5410\u91cf\uff1b<\/p>

\u540c\u65f6\u901a\u8fc7\u6df7\u5408\u786c\u4ef6\u8ba1\u7b97\u4e0e\u8f6f\u4ef6\u6a21\u62df\u7684\u65b9\u5f0f\uff0c\u5728\u63d0\u901f\u7684\u540c\u65f6\u4fdd\u8bc1\u8ba1\u7b97\u7cbe\u5ea6\u3002<\/p>

<\/div><\/figure>

\u53e6\u4e00\u65b9\u9762\u63a8\u51fa\u6761\u4ef6\u6027softmax rescaling<\/b>\u7b56\u7565\uff0c\u4ec5\u5728\u5fc5\u8981\u65f6\u6267\u884csoftmax\u7684\u7f29\u653e\u64cd\u4f5c\uff0c\u76f4\u63a5\u8df3\u8fc7\u5927\u91cf\u65e0\u7528\u7684\u8ba1\u7b97\u6b65\u9aa4\uff0c\u51cf\u5c11\u975e\u77e9\u9635\u4e58\u6cd5\u7684\u8fd0\u7b97\u91cf\u3002<\/p>

\u6b64\u5916\uff0c\u56e2\u961f\u5145\u5206\u5229\u7528Blackwell\u67b6\u6784\u76842-CTA MMA<\/b>\u6a21\u5f0f\uff0c\u8ba9\u4e24\u4e2a\u8ba1\u7b97\u5355\u5143\u642d\u6863\u5b8c\u6210\u77e9\u9635\u8fd0\u7b97\uff0c\u5404\u81ea\u4ec5\u52a0\u8f7d\u4e00\u534a\u7684\u8fd0\u7b97\u6570\u636e\u3002<\/p>

\u8fd9\u5c31\u5c06\u5171\u4eab\u5185\u5b58\u7684\u8bfb\u5199\u91cf\u76f4\u63a5\u780d\u534a\uff0c\u540c\u65f6\u8fd8\u51cf\u5c11\u4e86\u540e\u7eed\u7684\u539f\u5b50\u64cd\u4f5c\uff0c\u4ece\u6839\u6e90\u4e0a\u7f13\u89e3\u5171\u4eab\u5185\u5b58\u7684\u5e26\u5bbd\u538b\u529b\u3002<\/p>

<\/div><\/figure>

\u7b2c\u4e8c\u62db\uff0c\u91cd\u6784\u8ba1\u7b97\u6d41\u6c34\u7ebf\uff0c\u5b9e\u73b0\u7b97\u529b\u7684\u5e76\u884c\u6700\u5927\u5316\u3002<\/p>

FlashAttention-4\u6df1\u5ea6\u9002\u914dBlackwell\u67b6\u6784\u7684\u5168\u5f02\u6b65MMA\u64cd\u4f5c<\/b>\u548c\u65b0\u589e\u7684\u5f20\u91cf\u5185\u5b58TMEM<\/a><\/b>\uff0c\u91cd\u65b0\u8bbe\u8ba1\u4e86\u6ce8\u610f\u529b\u8ba1\u7b97\u7684\u524d\u5411\u548c\u53cd\u5411\u6d41\u6c34\u7ebf\u3002<\/p>

\u8ba9softmax\u8ba1\u7b97\u4e0e\u77e9\u9635\u4e58\u6cd5\u8fd9\u4e24\u4e2a\u6838\u5fc3\u73af\u8282\u5b9e\u73b0\u5b8c\u5168\u7684\u8ba1\u7b97\u91cd\u53e0\u3002<\/p>

<\/div><\/figure>

\u5f53\u786c\u4ef6\u7684\u5f20\u91cf\u6838\u5fc3\u5728\u5904\u7406\u4e00\u4e2a\u77e9\u9635\u5757\u65f6\uff0c\u53e6\u4e00\u90e8\u5206\u786c\u4ef6\u8d44\u6e90\u53ef\u540c\u65f6\u5bf9\u53e6\u4e00\u4e2a\u6570\u636e\u5757\u6267\u884csoftmax\u8ba1\u7b97\uff0c\u907f\u514d\u786c\u4ef6\u7b97\u529b\u7684\u7a7a\u95f2\u3002<\/p>

\u7b2c\u4e09\u62db\uff0c\u517c\u987e\u786c\u4ef6\u8fed\u4ee3\uff0c\u4e3a\u4e0b\u4e00\u4ee3GPU\u9884\u7559\u4f18\u5316\u7a7a\u95f4\u3002<\/p>

\u7814\u53d1\u56e2\u961f\u540c\u65f6\u8003\u8651\u5230Blackwell\u67b6\u6784\u7684\u786c\u4ef6\u5347\u7ea7\u8d8b\u52bf\uff0c\u76ee\u524dB300\/GB300 GPU\u7684\u6307\u6570\u8fd0\u7b97\u5355\u5143\u541e\u5410\u91cf\u5df2\u7ffb\u500d\u81f332 ops\/clock\/SM<\/b>\u3002<\/p>

\u9488\u5bf9\u8fd9\u4e00\u53d8\u5316\uff0c\u56e2\u961f\u660e\u786e\u8868\u793a\uff0cFlashAttention-4\u5f53\u524d\u7684\u8f6f\u4ef6\u6a21\u62df\u6307\u6570\u8fd0\u7b97\u65b9\u6848\uff0c\u5728\u4e0b\u4e00\u4ee3\u786c\u4ef6\u4e0a\u4f1a\u6839\u636e\u5b9e\u9645\u6027\u80fd\u8868\u73b0\u91cd\u65b0\u6743\u8861\uff0c\u786e\u4fdd\u7b97\u6cd5\u80fd\u6301\u7eed\u9002\u914d\u786c\u4ef6\u7684\u8fed\u4ee3\u5347\u7ea7\u3002<\/p>

\u544a\u522b C++\uff0c\u7f16\u8bd1\u901f\u5ea6\u72c2\u98d930\u500d<\/h2>

\u9664\u4e86\u7b97\u6cd5\u5c42\u7684\u6df1\u5ea6\u4f18\u5316\uff0cFlashAttention-4\u5728\u5f00\u53d1\u5c42\u9762\u4e5f\u5e26\u6765\u4e86\u53d8\u5316\u3002<\/p>

\u4e0e\u6b64\u524d\u57fa\u4e8eC++\u6a21\u677f\u5f00\u53d1\u7684FlashAttention-3\u4e0d\u540c\uff0cFlashAttention-4\u7684\u5168\u90e8\u4ee3\u7801\u57fa\u4e8ePython\u7684\u9886\u57df\u4e13\u7528\u7248\u672cCuTe-DSL\u6846\u67b6<\/a>\u7f16\u5199\uff0c\u5b9e\u73b0\u4e86\u96f6C++\u4ee3\u7801\u5f00\u53d1<\/b>\u3002<\/p>

\u8fd9\u4e00\u8bbe\u8ba1\u5e26\u6765\u7684\u662f\u7f16\u8bd1\u7684\u6548\u7387\u8dc3\u5347\u3002<\/p>

\u524d\u5411\u4f20\u64ad\u5185\u6838\u7684\u7f16\u8bd1\u65f6\u95f4\u4eceFlashAttention-3\u768455\u79d2\u7f29\u77ed\u81f32.5\u79d2\uff0c\u63d0\u901f22\u500d\uff1b<\/p>

\u53cd\u5411\u4f20\u64ad\u7684\u7f16\u8bd1\u65f6\u95f4\u4ece45\u79d2\u964d\u81f31.4\u79d2\uff0c\u63d0\u901f32\u500d\uff0c\u6574\u4f53\u7f16\u8bd1\u901f\u5ea6\u6700\u9ad8\u72c2\u98d930\u500d\u3002<\/p>

<\/div><\/figure>

\u5728B200 GPU\u4e0a\u7684\u5b9e\u6d4b\u6570\u636e\u663e\u793a\uff0c\u5176\u524d\u5411\u4f20\u64ad\u7b97\u529b\u6700\u9ad8\u8fbe\u52301613 TFLOPS\/s<\/b>\uff0c\u4e00\u4e3e\u5b9e\u73b071%\u7684\u7406\u8bba\u5cf0\u503c\u5229\u7528\u7387\u3002<\/p>

\u5bf9\u6bd4\u4e3b\u6d41\u7684\u8ba1\u7b97\u6846\u67b6\uff0cFlashAttention-4\u7684\u4f18\u52bf\u4e5f\u6bd4\u8f83\u660e\u663e\u3002<\/p>

\u6bd4\u82f1\u4f1f\u8fbe\u5b98\u65b9\u7684cuDNN 9.13\u5feb1.1-1.3\u500d\uff0c\u6bd4\u5e38\u7528\u7684Triton\u6846\u67b6\u5feb2.1-2.7 \u500d\u3002<\/p>

<\/div><\/figure>

\u4e14\u5728\u957f\u5e8f\u5217\u3001\u56e0\u679c\u63a9\u7801\u7b49\u5927\u6a21\u578b\u8bad\u7ec3\u63a8\u7406\u7684\u6838\u5fc3\u573a\u666f\u4e2d\uff0c\u6027\u80fd\u4f18\u52bf\u66f4\u4e3a\u7a81\u51fa\u3002<\/p>

One More Thing<\/h2>

\u8bba\u6587\u8fd8\u6307\u51fa\uff0ccuDNN\u4ece9.13\u7248\u672c\u5f00\u59cb\u5c31\u5df2\u7ecf\u5f00\u59cb\u53cd\u5411\u5438\u6536\u4e86FA4\u7684\u6838\u5fc3\u6280\u672f\u3002<\/p>

<\/div><\/figure>

\u770b\u6765\uff0c\u82f1\u4f1f\u8fbe\u81ea\u5df1\u4e5f\u5fcd\u4e0d\u4f4f\u6284\u4f5c\u4e1a\u4e86\uff08doge\uff09\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

\u95fb\u4e50 \u53d1\u81ea \u51f9\u975e\u5bfa<\/p>\n","protected":false},"author":1,"featured_media":4972,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4970","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/posts\/4970","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/comments?post=4970"}],"version-history":[{"count":7,"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/posts\/4970\/revisions"}],"predecessor-version":[{"id":4978,"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/posts\/4970\/revisions\/4978"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/media\/4972"}],"wp:attachment":[{"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/media?parent=4970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/categories?post=4970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ihub1.com\/index.php\/wp-json\/wp\/v2\/tags?post=4970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}