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What is the difference between concurrency, parallelism and asynchronous methods?
..., which means that it processes multiple sub-tasks of a task in multi-core CPU at same time.
An application can be neither parallel – nor concurrent, which means that it processes all tasks one at a time, sequentially.
An application can be both parallel – and concurrent, which means that it p...
fastest (low latency) method for Inter Process Communication between Java and C/C++
...e send/received,
2 Java processes just spawned, without assigning specific CPU cores with taskset:
TCP - 25 microseconds
Named pipes - 15 microseconds
Now explicitly specifying core masks, like taskset 1 java Srv or taskset 2 java Cli:
TCP, same cores: 30 microsecond...
Context switches much slower in new linux kernels
...ance problem in recent kernels has to do with the switch to the intel_idle cpuidle driver from acpi_idle, the driver used in older kernels. Sadly, the intel_idle driver ignores the user's BIOS configuration for the C-states and dances to its own tune. In other words, even if you completely disable a...
Why is volatile not considered useful in multithreaded C or C++ programming?
...g is to use a memory barrier, which indicates both to the compiler and the CPU that no memory access may be reordered across this point. Placing such barriers around our volatile variable access ensures that even non-volatile accesses won't be reordered across the volatile one, allowing us to write ...
为什么你越努力，却越焦虑？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...谈谈。如果有所疏漏偏颇，期待大家指正！
看到这个问题，我顿时有一股扑面而来的辛酸，因为我曾经在人生最该拼搏的时候，沉溺在一段不努力也不焦虑的「舒适」中。回头看看这段经历，我想我能够立刻给这个问题一个...
携程遭超长宕机：内部数据管理恐存严重漏洞 - 资讯 - 清泛网 - 专注C/C++及内核技术
...目前官方透露的信息判断，携程网站数据层、网络层均没问题，那么问题就在应用层或存储逻辑层。很可能关键性的系统部署和配置数据已被删除或篡改了。
不过，前支付宝运维团队创始人智锦撰文指出，携程网宕机很可能并...
Simple proof that GUID is not unique [closed]
...s licensed under the following terms: you must pay me $0.0001 per hour per CPU core you run it on. Fees are payable at the end of each calendar month. Please contact me for my paypal account details at your earliest convenience.
using System;
using System.Collections.Generic;
using System.Linq;
na...
C# 能否获取一个对象所占内存的大小？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...所占内存的大小？今日，在项目重构的时候忽然想到一个问题，一个类哪些成员的增加，会影响一个类所占内存的大小？C#有没有办法知道一个对象占多少内存呢？ ...今日，在项目重构的时候忽然想到一个问题，一个类哪些成员...
程序员羊皮卷下载版.pdf - 文档下载 - 清泛网 - 专注C/C++及内核技术
...救世主
20 第2 章 四招找到好工作
20 求职中的心理健康问题
20 大专生求职受歧视
21 这世界并不亏欠我们什么
23 求职中的正确态度
24 面试前充分准备
24 专注于真正的机会
25 五个步骤查实公司信息
26 筛选重点应聘目标
27 ...
Difference between a “coroutine” and a “thread”?
...ple threads may be executing at any given time. (Traditionally, on single-CPU, single-core machines, that concurrency was simulated with some help from the OS -- nowadays, since so many machines are multi-CPU and/or multi-core, threads will de facto be executing simultaneously, not just "conceptual...