From 6597de872f1bee474d9204ba258e30f551cbafcc Mon Sep 17 00:00:00 2001
From: wanghenshui <wanghenshui@qq.com>
Date: Tue, 23 Jul 2024 00:37:01 +0800
Subject: [PATCH] 164 patch

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 README.md      |  2 +-
 posts/16405.md | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 posts/16405.md

diff --git a/README.md b/README.md
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@@ -24,7 +24,7 @@ RSS使用仓库的release RSS [链接](https://github.com/wanghenshui/cppweeklyn
 
 ## 2024
 
-| [161](./posts/161.md) |[162](./posts/162.md) | [163](./posts/163.md) |[164](./posts/164.md) | | | | | | |
+| [161](./posts/161.md) |[162](./posts/162.md) | [163](./posts/163.md) |[164](./posts/164.md) [164修正](./posts/16405.md) | | | | | | |
 | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ |
 | [151](./posts/151.md) | [152](./posts/152.md) | [153](./posts/153.md) | [154](./posts/154.md) | [155](./posts/155.md) | [156](./posts/156.md) | [157](./posts/157.md) | [158](./posts/158.md) | [159](./posts/159.md) | [160](./posts/160.md) |
 |                    |                    |                    |                    | [145](./posts/145.md) | [146](./posts/146.md) | [147](./posts/147.md) | [148](./posts/148.md) | [149](./posts/149.md) | [150](./posts/150.md) |
diff --git a/posts/16405.md b/posts/16405.md
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+---
+layout: post
+title:  第164.5期
+---
+# C++ 中文周刊 164期补充
+
+
+昨天更新关于HFT的内容有误
+
+- cache warm 效果有限，加热icache缺乏其他优化验证修复，比如pgo，比如调大tlb。当然cache warm对于可以观测数据集预估业务的场景来说，简单粗暴，不过对于优化而言，很难说问题的根因在哪里，PGO应该是最直观的，cache warm给人一种野路子歪打正着的感觉，需要进一步分析。对于不可预估后端场景，cache warm就相当于CPU做无用功了，一定要测试，测试，测试
+
+- 其他例子，比如prefetch等，例子粗糙，缺少系统视角，如果缺乏这个知识需要科普，看这个小册子，反而可能造成误导
+
+
+需要系统了解可以看现代cpu性能分析与优化 有中文版本
+
+英文版 https://book.easyperf.net/perf_book
+
+中文版本可能比较旧，但对于科普系统学习知识也足够，京东77应该是涨价了，我买的时候是50
+
+公开课可以学一下mit 6.172 b站有视频 ppt可以这里下载 https://ocw.mit.edu/courses/6-172-performance-engineering-of-software-systems-fall-2018/
+
+实际上优化相关知识广，碎，杂，需要系统整体视角
+
+本文感谢崔博武 Anien 指正
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