今天发现一个系统innodb的spin rounds per wait为负,感觉很奇怪,原来是个bug: For example (output from PS but we have no patches here), ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation OS WAIT ARRAY INFO: signal Mutex spin waits , rounds , OS waits RW, rounds…

编辑 | MingMing 尽管机器学习的历史可以追溯到1959年,但目前,这个领域正以前所未有的速度发展.最近,我一直在网上寻找关于机器学习和NLP各方面的好资源,为了帮助到和我有相同需求的人,我整理了一份迄今为止我发现的最好的教程内容列表. 通过教程中的简介内容讲述一个概念.避免了包括书籍章节涵盖范围广,以及研究论文在教学理念上做的不好的特点. 我把这篇文章分成四个部分:机器学习.NLP.Python和数学. 每个部分中都包含了一些主题文章,但是由于材料巨大,每个部分不可能包含所有可能的主题…

超过 150 个最佳机器学习,NLP 和 Python教程 微信号 & QQ:862251340微信公众号:coderpai简书地址:http://www.jianshu.com/p/2be3... 我把这篇文章分为四个部分:机器学习,NLP,Python 和 数学.我在每一部分都会包含一些关键主题,但是网上资料太广泛了,所以我不可能包括每一个可能的主题. 如果你发现好的教程,请告诉我.在这篇文章中,我把每个主题的教程数量都是控制在五到六个,这些精选出来的教程都是非常重要的.每一个链接都会链接到…

墙外通道:http://thinkiii.blogspot.com/2014/05/a-brief-introduction-to-per-cpu.html per-cpu variables are widely used in Linux kernel such as per-cpu counters, per-cpu cache. The advantages of per-cpu variables are obvious: for a per-cpu data, we do not n…

Copied From:https://computing.llnl.gov/tutorials/parallel_comp/ Author: Blaise Barney, Lawrence Livermore National Laboratory UCRL-MI-133316 Table of Contents Abstract Overview What is Parallel Computing? Why Use Parallel Computing? Who is Using Para…

http://blog.chinaunix.net/uid-15007890-id-106930.html   CPU hotplug Support in Linux(tm) Kernel Linux支持CPU的热插拔功能 Maintainers:                    CPU Hotplug Core:                             Rusty Russell <rusty@rustycorp.com.au>                    …

http://www.grymoire.com/unix/sed.html Quick Links - NEW Sed Commands : label # comment {....} Block =- print line number a \- Append b label- Branch c \ - change dand D- Delete gand G- Get hand H- Hold i \- Insert l- Look nand N- Next pand P- Print q…

Lock-free programming is a challenge, not just because of the complexity of the task itself, but because of how difficult it can be to penetrate the subject in the first place. I was fortunate in that my first introduction to lock-free (also known as…

SMP Primer for Android 1.In this document Theory Memory consistency models Processor consistency CPU cache behavior Observability ARM’s weak ordering Data memory barriers Store/store and load/load Load/store and store/load Barrier instructions Addres…

Introduction to Linux Threads A thread of execution is often regarded as the smallest unit of processing that a scheduler works on. A process can have multiple threads of execution which are executed asynchronously. This asynchronous execution brings…