a linux trace/probe tool. 官网:https://sourceware.org/systemtap/ 探測点 SystemTap脚本主要是由探測点和探測点处理函数组成的,来看下都有哪些探測点可用. The essential idea behind a systemtap script is to name events, and to give them handlers. Systemtap works by translating the script to C,…
题目信息 1078. Hashing (25) 时间限制100 ms 内存限制65536 kB 代码长度限制16000 B The task of this problem is simple: insert a sequence of distinct positive integers into a hash table, and output the positions of the input numbers. The hash function is defined to be "H(…
參考: 网络编程–IO模型演示样例 几种server端IO模型的简介及实现 背景知识 堵塞和非堵塞 对于一个套接字的 I/O通信,它会涉及到两个系统对象.一个是调用这个IO的进程或者线程,还有一个就是系统内核. 比方当一个读操作发生时.它会经历两个阶段: ①等待数据准备 (Waiting for the data to be ready) ②将数据从内核复制到进程中 (Copying the data from the kernel to the process) 堵塞,在linux中,默认情况…