HTTP/2 Push を Service Worker + Cache Aware Server Push で効率化したい話 - Block Rockin’ Codes
intro このエントリは、 http2 advent calendar の 1 日目です。 http2study の分かってる人にとっては、「casper の JS 版を作ってる」だけで伝わるかもしれませんが、そうでない場合非常に話すべきことがたくさん有る気がするので、順を追って説明します。 今回理解すべき内容は以下 http2 push の問題点 cache aware server push bloom filter と golomb coded set cache fingerprinting dispenser.js (最初は casper.js と言ってたけど、よく考えると被ってるのがあるので dispenser.js に変えました) そして結論からいうと、まだまだ想定していた挙動まではいけませんでした。。 http2 push の問題点 http2 で push することで、
The Calibrator (v0.9e), a Cache-Memory and TLB Calibration Tool
The Calibrator (v0.9e), a Cache-Memory and TLB Calibration Tool Introduction The Source Code and how to compile it Binary Executables How to use The Calibrator Sample Output The Calibrated Hardware Database Request for Contributions and Feedback 1. Introduction The Calibrator is a small C program that is supposed to analyze a computers (cache-) memory system and extract the following parameters: n
bcache
Bcachefs Bcache is done and stable - but work hasn't stopped. Bcachefs is the hot new thing: a next generation, robust, high performance copy on write filesystem. You could think of it as bcache version two, but it might be more accurate to call bcache the prototype for what's happening in bcachefs - incrementally developing a filesystem was part of the bcache plan since nearly the beginning. It's
Hoytech
vmtouch - the Virtual Memory Toucher Portable file system cache diagnostics and control Download from github Read the online manual vmtouch is a tool for learning about and controlling the file system cache of unix and unix-like systems. It is BSD licensed so you can basically do whatever you want with it. Quick install guide: $ git clone https://github.com/hoytech/vmtouch.git $ cd vmtouch $ make
Intel® Performance Counter Monitor - A Better Way to Measure CPU...
Contributors (in historical order) Roman Dementiev, Thomas Willhalm, Otto Bruggeman, Patrick Fay, Patrick Ungerer, Austen Ott, Patrick Lu, James Harris, Phil Kerly, Patrick Konsor,Andrey Semin, Michael Kanaly, Ryan Brazones, Rahul Shah, Jacob Dobkins Introduction to Intel® PCM (Performance Counter Monitor) The complexity of computing systems has tremendously increased over the last decades. Hierar
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CPU内キャッシュ効率とベクトル演算（SIMD）を利用した計算密度向上のための2分木構築 - maropuのメモ墓場
最近、現実逃避でやっていた作業結果のメモ． SIGMOD'10のintel lab.論文の内容を実際に自分でプログラムして、評価してみた． 2000年以降DB研究界隈では、データ領域が全てメモリ上に載る環境を前提としたボトルネック分析/改善提案を積極的に行っていて、最近は特にその傾向が強い． 今後の研究作業の役に立つだろうと思い、上の論文を題材にoprofileを使ってCPU内処理分析をやってみた（ノウハウ獲得のために）．oprofileを使うと、xxstat系では分からない、CPU使用率の内訳を取得することができる． 参考論文は以下． http://portal.acm.org/citation.cfm?id=1807167.1807206 論文内では、簡単にいえば以下3点を行っている． 1. ポインタを利用した2分木実装ではノード移動毎にCache/TLBミスが発生し、CPU内処理がス
Portable Hardware Locality (hwloc)
The Portable Hardware Locality (hwloc) software package provides a portable abstraction (across OS, versions, architectures, ...) of the hierarchical topology of modern architectures, including NUMA memory nodes (DRAM, HBM, non-volatile memory, CXL, etc.), processor packages, shared caches, cores and simultaneous multithreading. It also gathers various system attributes such as cache and memory in
How to use the cachegrind output to optimize the application
I need to improve the throughput of the system. The usual cycle of optimization has been done and we have already achieved 1.5X better throughput. I am now beginning to wonder if I can utilize the cachegrind output to improve the system's throughput. Can somebody point me to how to begin on this? What I understand is we need to ensure most frequently used data should be kept small enough so that i
Gallery of Processor Cache Effects
Most of my readers will understand that cache is a fast but small type of memory that stores recently accessed memory locations. This description is reasonably accurate, but the “boring” details of how processor caches work can help a lot when trying to understand program performance. In this blog post, I will use code samples to illustrate various aspects of how caches work, and what is the impa
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GitHub - golang/groupcache: groupcache is a caching and cache-filling library, intended as a replacement for memcached in many cases.
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Research Blog: A Runtime Solution for Online Contention Detection and Response