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PPT修正 StreamK 条件为 P<C/2

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2026-08-23 10:21:14 +00:00
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commit 80aadc10ed
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BMM算子优化分析_Release/BMM算子优化分析_v0.7_讲解PPT.html
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@@ -169,7 +169,8 @@ body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:#0f172a;c
<div class="slide" id="s10">
<h2>9. StreamK — K 维核间切分</h2>
<p><b>思路</b>：B/M/N 都填不满核时，把 K 切给多个核各算一段，再归约</p>
<p style="margin-top:12px"><b>进入条件</b>：P = B·MN·4B/L0C < 32；K/grid_K ≥ 128 元素（dValue 256B）</p>
<p style="margin-top:12px"><b>进入条件</b>：P = B·MN·4B/L0C &lt; 16（=C/2）；K/grid_K ≥ 128 元素（dValue 256B）</p>
<p class="sub">阈值取 C/2：grid_K≥2 时每块需 2 核，P×2 ≤ C 才放得下</p>
<p><b>归约代价</b>（按实现流程推导）：</p>
<div class="code">第1步：grid_K 个 AIC 各算 K/grid_K 段，L0C 原地累加
第2步：fixpipe 写部分和到 workspace（驻留 L2，走 5.2TB/s 写口）