On mac os, programs may need Instruments to tuning, and when you face too many probe messages, you'll need some Flame Graphs. Here I introduce Brendan Gregg and his blog: http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html and he mestioned on…

转自 https://www.infoq.com/news/2015/08/JVM-Option-mixed-mode-profiles Java has added a new launch option “-XX:+PreserveFramePointer” in JDK versions 8 and 9, that enables generation of mixed-mode flame graphs. Flame graphs visually present the data ga…

http://www.brendangregg.com/flamegraphs.html Flame graphs are a visualization of profiled software, allowing the most frequent code-paths to be identified quickly and accurately. They can be generated using my open source programs ongithub.com/brenda…

转自:http://www.brendangregg.com/blog/2017-07-30/coloring-flamegraphs-code-type.html I recently improved flame graph code coloring. If you're automating or implementing flame graphs, this is a small detail that may interest you. (For an intro to flame…

火焰图(Flame Graphs) 一.概述: 火焰图(flame graph)是性能分析的利器,通过它可以快速定位性能瓶颈点. perf 命令(performance 的缩写)是 Linux 系统原生提供的性能分析工具,会返回 CPU 正在执行的函数名以及调用栈(stack). 本文介绍它的安装和基本用法. 二.安装perf和可视化生成器 # yum install perf -y           //yum方式安装perf # git clone https://github.com/b…

关键词:Flame Graph.perf.perl. FlameGraph是由BrendanGregg开发的一款开源可视化性能分析工具,形象的成为火焰图. 从底向上像火苗一样逐渐变小,也反映了相互之间的包含关系,下面的框条包含上面内容. 经过FlameGraph.git处理,最终生成矢量SVG图形,可以形象的看出不同部分占用情况,以及包含与被包含情况. 除了反应CPU使用情况的CPU FlameGraph,还有几种Flame Graph:Memory Flame Graph.Off-CPU Fl…

http://www.brendangregg.com/flamegraphs.html http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/e8260b6328fb http://techblog.netflix.com/2015/07/java-in-flames.html https://github.com/jrudolph/perf-map-agent http://www.brendangregg.com/perf.html http…

原文:[Xamarin 跨平台机制原理剖析] [看了请推荐,推荐满100后,将发补丁地址] Xamarin项目从喊口号到现在,好几个年头了,在内地没有火起来,原因无非有三,1.授权费贵 2.贵 3.原生态Java开发Android的越来越多,人工费用成本降低. 上面说的3条,都跟钱相关,不占技术边,看起来跟本文的标题严重不符.但是,细细看来,如果这个产品的圈子打不开,再牛的技术,也是枉然.因为技术是在不断推进的, 性能问题,技术问题,实现问题,等等都可以随着时间的推动去解决,但是,Xamarin…

home Choosing a Linux Tracer (2015) 08 Jul 2015 Linux Tracing is Magic! A tracer is an advanced performance analysis and troubleshooting tool, but don't let that intimidate you... If you've used strace(1) or tcpdump(8) – you've used a tracer. System…

原文:[Xamain 跨平台机制原理剖析] [看了请推荐,推荐满100后,将发补丁地址] Xamarin项目从喊口号到现在,好几个年头了,在内地没有火起来,原因无非有三,1.授权费贵 2.贵 3.原生态Java开发Android的越来越多,人工费用成本降低. 上面说的3条,都跟钱相关,不占技术边,看起来跟本文的标题严重不符.但是,细细看来,如果这个产品的圈子打不开,再牛的技术,也是枉然.因为技术是在不断推进的, 性能问题,技术问题,实现问题,等等都可以随着时间的推动去解决,但是,Xamarin公…