原文:http://kate-butenko.blogspot.tw/2012/07/investigating-issues-with-unmanaged.html I want to write this blogpost really fast, until I forget everything, despite I have absolutely no time and need to work on other cases :( Let's count this as part of…

转载自:http://developer.android.com/intl/zh-cn/tools/debugging/debugging-memory.html Because Android is designed for mobile devices, you should always be careful about how much random-access memory (RAM) your app uses. Although Dalvik and ART perform ro…

1. Introduction. 1.1 Managed structures that contain strings are a common sight. The trouble is that managed strings are non-blittable. This means that they do not have a single common representation in the unmanaged world. However, there are several…

Symptom You have questions related to the SAP HANA memory. You experience a high memory utilization or out of memory dumps. Environment SAP HANA Cause 1. Which indications exist for SAP HANA memory problems?2. How can I collect information about the…

NET Memory Profiler 跟踪.net 应用内存 用 .NET Memory Profiler 跟踪.net 应用内存使用情况--基本应用篇 作者:肖波      .net 框架号称永远不会发生内存泄漏,原因是其引入了内存回收的机制.但实际应用中,往往我们分配了对象但没有释放指向该对象的引用,导致对象永远无法释放.最常见的情况就是给对象添加了事件处理函数,但当不再使用该对象时却没有将该函数从对象的事件handler中减掉.另外如果分配了非托管内存,而没有手工释放,GC同样无能为力.…

还是说Memory Model,gcc的__sync_synchronize真是太坑爹了! 时间 2012-01-29 03:18:35  IT牛人博客聚合网站 原文  http://www.udpwork.com/item/6751.html 主题 GCC 嗯,还是说可见性的问题.由于CPU和编译器的乱序执行功能,我们经常不得不在代码中手动插入memory barrier.如果你还不清楚memory barrier是什么,那么请先读这个 http://en.wikipedia.org/wiki…

.net 框架号称永远不会发生内存泄漏,原因是其引入了内存回收的机制.但实际应用中,往往我们分配了对象但没有释放指向该对象的引用,导致对象永远无法释放.最 常见的情况就是给对象添加了事件处理函数,但当不再使用该对象时却没有将该函数从对象的事件handler中减掉.另外如果分配了非托管内存,而没有手工 释放,GC同样无能为力.所以当.net应用发生内存泄漏后如何跟踪应用的内存使用情况,定位到程序设计中的缺陷显得非常重要.本文将介绍通过.NET Memory Profiler来跟踪.net应用的内存…

原文地址:https://www.simple-talk.com/dotnet/.net-framework/the-dangers-of-the-large-object-heap/ You'd have thought that memory leaks were a thing of the past now that we use .NET. True, but we can still hit problems. We can, for example, prevent memory…

1. Introduction. 1.1 In part 1 of this series of blogs we studied how to pass a managed structure (which contains strings) to unmanaged code. The structure was passed as an "in" (by-value) parameter, i.e. the structure was passed to the unmanage…

1. Introduction. 1.1 In part 1 of this series of blogs we studied how to pass a managed structure (which contains strings) to unmanaged code. The structure was passed as an "in" (by-value) parameter, i.e. the structure was passed to the unmanage…

小结: 1. conflicting access 2.性能危害 优化 The cost of race detection varies by program, but for a typical program, memory usage may increase by 5-10x and execution time by 2-20x. 3.典型案例与修复 Accidentally shared variable // ParallelWrite writes data to file1…

目录 在 C# 中使用 Span 和 Memory 编写高性能代码 .NET 中支持的内存类型 .NET Core 2.1 中新增的类型 访问连续内存: Span 和 Memory Span 介绍 C# 中的 Span Span 和 Arrays Span 和 ReadOnlySpan Memory 入门 ReadOnlyMemory Span 和 Memory 的优势 连续和非连续内存缓冲区 不连续的缓冲区: ReadOnly 序列 实际场景 Benchmarking 基准测试 安装 NuGe…

Investigating Your RAM Usage In this document Interpreting Log Messages                 内存分析日志中各消息的含义 Viewing Heap Updates               查看当前内存快照的2种方法 Tracking Allocations                    跟踪记录内存分配2种方法 Viewing Overall Memory Allocations  用adb站在全局角度…

Part 5: Parallel Programming In this section, we cover the multithreading APIs new to Framework 4.0 for leveraging multicore processors: Parallel LINQ or PLINQ The Parallel class The task parallelism constructs The concurrent collections SpinLock and…

C#动态调用C++编写的DLL函数 动态加载DLL需要使用Windows API函数:LoadLibrary.GetProcAddress以及FreeLibrary.我们可以使用DllImport在C#中使用这三个函数. [DllImport("Kernel32")] public static extern int GetProcAddress(int handle, String funcname); [DllImport("Kernel32")] public…

事实上这一直是个非常无解的问题.最好的办法是将C++类库写成COM. 可是有时候往往不能这个做.那就仅仅有两种办法:转成C函数形式或者Manage C++封装. 下文就介绍了这两种方法. 原帖:http://www.codeproject.com/KB/cs/marshalCPPclass.aspx Introduction I recently needed to marshal some legacy C++ classes into a C# project on which I was…

今天,我们继续redis源代码test下测试在封装中的其它文件.今天读数memtest档,翻译了,那是,memory test 存储器测试工具..可是里面的提及了非常多东西,也给我涨了非常多见识,网上关于memtest这样的类似的redis内部边缘的文件解析基本没有,所以自己从头開始学习.机器的内存检測会和机器的CPU位数有关,32位或64位会影响后面的一些宏定义參数. 首先亮出memtest中的API: /* 内存检測API */ void memtest_progress_start(cha…

Introduction Span<T> is a new type we are adding to the platform to represent contiguous regions of arbitrary memory, with performance characteristics on par with T[]. Its APIs are similar to the array, but unlike arrays, it can point to either mana…

原文:Finding Memory Leaks in WPF-based applications There are numbers of blogs that folks wrote about memory leaks in Microsoft .Net Framework managed code and unmanaged code based applications. In this blog I wanted to: Show coding practices that can…

这是一篇Dr. Dobb's Journal对STL之父stepanov的采访.文中数次提到STL的基本思想.语言的特性.编程的一些根本问题等,非常精彩.这篇文章让我想去拜读下stepanov的大作<Elements of Programming>了.原文链接: http://www.stepanovpapers.com/drdobbs-interview.html 我先对文章内容做下总结,并在最后附上原文,把一些认为重要又精彩的语句进行了标红. Stepanov讲到其关于“泛型编程”(gen…

背景 随着集群规模和负载增加,MapReduce JobTracker在内存消耗,线程模型和扩展性/可靠性/性能方面暴露出了缺点,为此需要对它进行大整修. 需求 当我们对Hadoop MapReduce框架进行改进时,需要时刻谨记的一个重要原则是用户的需求.近几年来,从Hadoop用户那里总结出MapReduce框架当前最紧迫的需求有: (1)可靠性(Reliability)– JobTracker不可靠 (2)可用性(Availability)– JobTracker可用性有问题 (3) 扩展…

In [8]: import numpy as np import matplotlib.pyplot as plt import matplotlib as mpl from sklearn.preprocessing import StandardScaler from sklearn.naive_bayes import GaussianNB, MultinomialNB from sklearn.pipeline import Pipeline from sklearn.neighbor…

转载 略谈GCHandle C# - Marshal.StructureToPtr方法简介 Marshal类 两个方法StructureToPtr和PtrToStructure实现序列化 字节 数组 转换 using System; using System.Collections.Generic; using System.Linq; using System.Runtime.InteropServices; using System.Text; using System.Threading.…

private void btnPrinter_Click(object sender, EventArgs e) { #region ESC 热敏图像点阵像素点读取打印 //Bitmap bitmap = new Bitmap(@"D:\450X100.bmp"); //NetPOSPrinter netPOSPrinter = new NetPOSPrinter(); //netPOSPrinter.PrintPic(bitmap); #endregion #region EPL…

ZPL(Zebra Programming Language) 是斑马公司(做条码打印机的公司)自己设计的语言, 由于斑马打印机是如此普遍, 以至于据我所见所知, 条码打印机全部都是斑马的, 所以控制条码打印机几乎就变成了对ZPL的使用. 总的逻辑分为以下两步: (1)编写ZPL指令 (2)把ZPL作为C#的字符串, 由C#把它送至连接打印机的端口. 其中, 用C#把字符串送并口的写法是固定的, 这部分的代码如下: public class Printer { [System.Runtime.I…

这段时间比较闲,研究下内存管理,从官方文档开始啃起<TCMalloc : Thread-Caching Malloc>. 1.动机 TCMalloc要比glibc 2.3的malloc(可以从一个叫作ptmalloc2的独立库获得)和其他我测试过的malloc都快.ptmalloc在一台2.8GHz的P4机器上执行一次小对象malloc及free大约需要300纳秒,而TCMalloc的版本同样的操作大约只需要50纳秒.malloc版本的速度是至关重要的,因为如果malloc不够快,应用程序的作…

示例1:分配一个新的内存地址给新变量 Point p; // Initialize unmanged memory to hold the struct. IntPtr pnt = Marshal.AllocHGlobal(Marshal.SizeOf(p)); // Copy the struct to unmanaged memory. Marshal.StructureToPtr(p, pnt, false); // Create another point. Point anotherP…

原文链接: http://blogs.msdn.com/b/tess/archive/2009/03/20/debugging-a-net-crash-with-rules-in-debug-diag.aspx 原文用到的软件其实名字是叫: Debug Diagnostics 微软的网站上有下载 原文内容如下: During mine and Micke’s presentation at TechDays this week I showed a demo of setting up rule…

最近在用latex写毕业论文,编辑环境用的是Sublime Text 2 加 latextools 插件,在使用latextools的\cite命令来引用参考文献时,我们希望输入\cite{ 后自动弹出所有参考文献提示,本文总结一下设置过程中遇到的坑. 首先要保证设置文件LaTeXTools.default-settings中参考文献自动补全命令设置为true:“"cite_auto_trigger": true” latextools插件中当输入\cite{ 时会触发一个名为“lat…

在ASP.NET中,用于处理的请求,需要封装为HttpWorkerRequest类型的对象.该类为抽象类,定义在命名空间System.Web下. #region Assembly System.Web.dll, v4.0.0.0 // C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Web.dll #endregion using System; using Sys…