Linux process vs thread Question I have a query related to the implementation of threads in Linux. Linux does not have an explicit thread support. In userspace, we might use an thread library (like NPTL) for creating threads. Now if we use NPTL its s…

Process program program==code+data; 一个进程可以对应多个程序,一个程序也可以变成多个进程.程序可以作为一种软件资源长期保存,以文件的形式存放在硬盘 process: 相应的程序+CPU上下文+一组系统资源 动态性, 独立性, 并发性 一个CPU,任何时刻最多只能有一个进程去使用它 process VS thread 进程的资源分配的基本单位,是分配资源的抽象:进程把一组相关资源组合起来,构成了一个资源平台,或者说资源环境,包括运行上下文,内存地址空间,打开的文…

process vs thread http://blog.csdn.net/mishifangxiangdefeng/article/details/7588727 6.进程与线程的区别:系统调度是对进程还是线程,线程与进程共享的内存空间.公共地址空间等: A.操作系统只调度进程,不调度线程 B.线程共享内存地址空间,进程不共享 C.线程间可共享内存数据,但进程不可以 D.进程可以通过IPC通信,但线程不可以7.内存管理:段页式管理,地址映射表是?(操作系统方面的知识也不能掉以轻心呀) A.…

Activity, Service,Task, Process and Thread之间到底是什么关系呢? 首先我们来看下Task的定义,Google是这样定义Task的:a task is what the user experiences as an "application." It's a group of related activities, arranged in a stack. A task is a stack of activities, not a class…

1.刚才未启动zookeeper集群的时候,直接启动kafka脚本程序,kafka报错了,但是进程号启动起来来,再次启动出现如下所示的问题,这里先将进程号杀死,再启动脚本程序. [hadoop@slaver1 script_hadoop]$ kafka-start.sh start kafkaServer... [-- ::,] INFO Verifying properties (kafka.utils.VerifiableProperties) [-- ::,] INFO Property…

Shell script for logging cpu and memory usage of a Linux process http://www.unix.com/shell-programming-and-scripting/223177-shell-script-logging-cpu-memory-usage-linux-process.html…

1. 问题现象 启动 kafka 时报错:Failed to acquire lock on file .lock in /tmp/kafka-logs. A Kafka instance in another process or thread is using this directory. 2. 解决方案 2.1 方案一 删除 /tmp/kafka-logs 目录,然后重启 kafka: 2.2 方案二 修改配置的日志文件目录 在 config/server.properties 中修改…

问题描述: yum 安装更新提示 rpmdb: Thread/process failed: Thread died in Berkeley DB library 问题解决: 01.删除yum临时库文件 rm -fr /var/lib/rpm/__db.* 02.重建rpm数据库 rpm --rebuilddb 03.清理缓存及生产yumdb缓存 yum clean all yum makecache…

[root@bigdata-server-02 /]# ps --help all Usage: ps [options] Basic options: -A, -e all processes -a all with tty, except session leaders a all with tty, including other users -d all except session leaders -N, --deselect negate selection r only runni…

What are the differences between a process and a thread? How are they similar? How can 2 threads communicate? How can 2 process communicate? Both processes and threads are independent sequences of execution. The main difference is that threads (of th…