steal.pdf http://supertech.csail.mit.edu/papers/steal.pdf This paper studies the problem of eciently scheduling fully strict (i.e., wellstructured) multithreaded computations on parallel computers. A popular and practical method of scheduling this ki…

worksteal的场景 对于一个线程池,每个线程有一个队列,想象这种场景,有的线程队列中有大量的比较耗时的任务堆积,而有的线程队列却是空的,现象就是有的线程处于饥饿状态,而有的线程处于消化不良的状态,这时就需要一种方法来解决这个问题. 需要worksteal,顾名思义就是任务窃取,当一个线程处于饥饿状态时,它就会去其它的线程队列中窃取任务,解决线程饥饿导致的效率底的问题. worksteal要点 每个工作线程将任务放到它内部的队列中: 队列是一个双端队列,支持LIFO的push_front和p…

http://geek.rohitkalhans.com/2013/09/enhancedMTS-deepdive.html   科学上网 Introduction Re-applying binary logs generated from highly concurrent master on the slave has always been an area of focus. It is important for various reasons. First, in real-time…

BACKGROUND OF THE INVENTION  1. Field of the Invention  The present invention relates generally to heterogeneous computer systems.  2. Background Art  Computers and other such data processing devices have at least one control processor that is genera…

Minimizing the overall power conservation in a symmetric multiprocessor system disposed in a system-on-chip (SoC) depends on using voltage islands operated at different voltages such that similar circuits will perform at significantly different level…

spark论文中说他使用了延迟调度算法,源于这篇论文:http://people.csail.mit.edu/matei/papers/2010/eurosys_delay_scheduling.pdf 同时它也是hadoop的调度算法. Abstract delay scheduling: when the job that should be scheduled next according to fairness cannot launch a local task, it waits f…

原文在http://rerun.me/2014/10/06/akka-notes-actorsystem-in-progress/ 像我们前面看到的,我们可以用ActorSystem的actorof方法来创建Actor.其实你可以用ActorSystem做更多事.我们可以先看下Configuration和Scheduling. 让我们先看下ActorSystem 的方法. 1. 配置管理 还记得前一篇我们用application.conf文件来配置我们的日志级别吗?这个文件跟java里用的.pr…

.定时任务的实现,比如有个任务是要晚上2点10分的时候要去触发的,先定义这个任务类RskBookFilterInitDiningService.cs,这里其实有两种实现,一种是需要继承QuartzJobObject任务类的,比如下面这个,还有一种直接指定执行某个service的某个方法,先说第一种 namespace Bll.ExtFunc { public class RskBookFilterInitDiningService : QuartzJobObject { public strin…

目录 . 引言 . 进程优先级 . 进程的生命周 . 进程表示 . 进程管理相关的系统调用 . 进程调度 . 完全公平调度类 . 实时调度类 . 调度器增强 . 小结 1. 引言 在多处理器系统中,可以真正并行运行的进程数目,取决于物理CPU的数目内核和处理器建立了多任务的"错觉",即可以并行做几种操作,这是通过以很短的间隔在系统运行的应用程序之间不停切换而做到的,这种系统管理方式引发了几个内核必须解决的问题 . 除非明确地要求,否则应用程序不能彼此干扰,例如 ) 应用程序A的错误不能…

端口偷窃(Port Stealing)技术   该技术主要用于局域网中间人攻击中,尤其目标计算机采用静态ARP后,导致ARP欺骗无效.   背景知识:路由器为了方便转发数据包,会在内部记录每个接口和Mac地址的对应关系.例如,当计算机A通过网线向路由器发送了一个数据包,路由器会自动将该计算机Mac地址和网线所连接的接口B进行绑定.如果路由器收到要转发给A的数据包,就会将该包从接口B发出.A就可以顺利接受到数据包.这样,路由器就避免广播发包,同时其他计算机也无法获取A的数据包.   技术实现:其他…

Machine scheduling Time Limit : 5000/2000ms (Java/Other)   Memory Limit : 32768/32768K (Java/Other) Total Submission(s) : 4   Accepted Submission(s) : 1 Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description A Baidu’s engineer n…

在项目中又用到了定时器,对于定时器的应用总是模模糊糊的,今天结合网上找到的资料与自己在项目中写的简单地在此写一下,以备需要时查阅. 一个Quartz的CronTrigger表达式分为七项子表达式,其中每一项以空格隔开,从左到右分别是:秒,分,时,月的某天,月,星期的某天,年:其中年不是必须的,也就是说任何一个表达式最少需要六项.例:0 0 12 ? * WED 表示每个星期三的12点执行,这里没有“年”这项. 先看示列:"0 0/30 8-10 5,20 * ?" 表示“每个月的5日和…

最近做一个 Spring4.1.0 集成 quartz1.8.2 定时器功能,一直报 class not found : org.springframework.scheduling.quartz.JobDetailBean : 困扰许久,后来仔细检查发现问题为 :spring-context-support-3.1.0.RELEASE.jar 包没有: 后导入,代码成功编译:贴出代码,以免再犯错! 1.application 配置如下: <bean name="exampleJob&qu…

3.8 Describe the differences among short-term, medium-term, and longterm scheduling. 答案: 长期调度决定哪些进程进入到系统中,. 中期调度决定进入到系统中的进程哪些可以竞争处理器, 即哪些进程可以进入到就绪队列. 短期调度决定将处理器分配给就绪队列中的哪些进程. 扩展: 长期调度(long-term scheduling)又叫做高级调度(High-level scheduling)或作业调度(job sched…

Machine scheduling Time Limit: 5000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1000    Accepted Submission(s): 363 Problem Description A Baidu's engineer needs to analyze and process large amount of data o…

Scheduling Lectures Time Limit:3000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu Submit Status Practice UVA 607 Appoint description:  System Crawler  (2015-08-26) Description   You are teaching a course and must cover n ( ) topics. The leng…

Stealing Harry Potter's Precious Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description Harry Potter has some precious. For example, his invisible robe, his wand and his owl. When Hogwarts school is in…

Exceeded maximum number of retries. Exceeded max scheduling attempts 3 for instance…

Exceeded maximum number of retries. Exceeded max scheduling attempts 3 for instance 7d90eb80-29e2-4238-b658-ade407ff9456. Last exception: [u'Traceback (most recent call last):\n', u' File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py"…

linux内核打印"BUG: scheduling while atomic"和"bad: scheduling from the idle thread"错误的时候, 通常是在中断处理函数中调用了可以休眠的函数,如semaphore,mutex,sleep之类的可休眠的函数, 而linux内核要求在中断处理的时候,不允许系统调度,不允许抢占,要等到中断处理完成才能做其他事情. 因此,要充分考虑中断处理的时间,一定不能太久. 另外一个能产生此问题的是在idle进程里…

最近因使用Spring.Net框架而接触.了解到其与Quartz.Net的集成,即Spring.Scheduling.Quartz模块. Spring通过对Quartz.Net的封装,采用了spring核心注入思路,给我们提供更为简单.便利的使用方式.当然直接使用Quartz.Net也是可以的. 在使用的过程中Spring.Net版本为1.3.2,而该版本的Spring.Scheduling.Quartz只支持Quartz.Net(1.0.3版),无法支持Quartz.Net(>=2.0.1版)…

http://pages.videotron.com/aminer/threadpool.htm http://pages.videotron.com/aminer/zip/threadpool.zip  FPC Pascal v2.2.0+ / Delphi 5+ http://pages.videotron.com/aminer/zip/pthreadpool_xe4.zip (for Delphi XE to XE4) http://pages.videotron.com/aminer/z…

Close Enough Computations 题目连接: https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2193 Descriptionww.co The nutritional food label has become ubiquitous. A sample label is shown to the right…

Part 95   Deadlock in a multithreaded program class Program { static void Main(string[] args) { Console.WriteLine("main start"); Account a1 = ,); Account a2 = ,); AccountManager m1 = ); Thread t1 = new Thread(m1.Transfer); t1.Name = "t1&quo…

Quartz.NET是JAVA Job Scheduling框架Quartz在.NET平台上的实现,可以满足小型乃至大型企业应用中的Job Scheduling. 通过Nuget安装Quartz.NET: Install-Package Quartz 创建一个简单的Job Scheduling: using Quartz; using Quartz.Impl; using System; namespace QuartzFirstDemo { public class JobDemo : IJo…

 UVa 1380 A Scheduling Problem 题目: http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=41557 思路:   给出一个任务调度树,单向边u->v表示u必须在v之前完成,双向边u-v表示无所谓方向. 题目给出定理,首先dfs求得忽略无向边后的最长链点数k,那么问题就是判断是否可以通过无向边定向从而使得最长链点数不超过k.用dp的判断. 设f[i]表示以i为根的子树中所有的边定向后最长链点数不超过…

在一个业务类有下列属性 private SchedulerFactoryBeanscheduler; public SchedulerFactory BeangetScheduler() { return scheduler; } public void setScheduler(SchedulerFactoryBean scheduler) { this.scheduler = scheduler; } 用spring 进行装配: <property name="scheduler&qu…

A Scheduling Problem   Description There is a set of jobs, say x1, x2,..., xn <tex2html_verbatim_mark>, to be scheduled. Each job needs one day to complete. Your task is to schedule the jobs so that they can be nished in a minimum number of days. Th…

The code for this tutorial can be downloaded here: threadworms.py or from GitHub. This code works with Python 3 or Python 2, and you need Pygame installed as well in order to run it. Click the animated gif to view a larger version. This is a tutorial…

This tutorial demonstrates the use of the boost::asio::strand class to synchronise callback handlers in a multithreaded program. The previous four tutorials avoided the issue of handler synchronisation by calling the boost::asio::io_service::run() fu…