pid

How do I found out which node an erlang process is running on?

由 喜你入骨 提交于 2019-12-08 15:20:43
问题 Given that I can send PIDs from a process to an other, even across nodes, if I receive a Pid from a process within a different process (possibly on a different node) how do I find out which node the PID in question runs in/on? erlang:process_info(Pid) does not seem to have that information in it. Thanks. 回答1: erlang:node/1 node(Arg) -> Node Returns the node where Arg is located. Arg can be a pid, a reference, or a port. If the local node is not alive, nonode@nohost is returned. 来源： https:/

How to get pid of my make command in the Makefile?

由 和自甴很熟 提交于 2019-12-08 14:47:14
问题 I want to use a temp directory that will be unique to this build. How can I get the pid of my make command in the Makefile? I tried: TEMPDIR = /tmp/myprog.$$$$ but this seems to store TEMPDIR as /tmp/myprog.$$ and then eval as a new pid for every command which refs this! How do I get one pid for all of them (I'd prefer the make pid, but anything unique will do). Thanks in advance. 回答1: Try mktemp for creating unique temporary filenames. The -d option will create a directory instead of a file.

fork() returns 0, but the child process getpid()!=0. Why?

由 吃可爱长大的小学妹 提交于 2019-12-08 14:20:37
问题 This is the C code to test fork() system call: #include<stdio.h> #include<stdlib.h> #include<sys/types.h> #include<unistd.h> #include<wait.h> int main(int argc, char *argv[]) { printf("I am: %d\n", (int)getpid()); pid_t pid = fork(); printf("fork returned: %d\n", (int)pid); if (pid < 0) { perror("fork failed"); } if (pid==0) { printf("I am the child with pid %d\n", (int)getpid()); sleep(5); printf("Child exiting...\n"); exit(0); } printf("I am the parent with pid %d, waiting for the child\n",

Identify the PID of a Executing Batch File in Powershell

由 ℡╲_俬逩灬. 提交于 2019-12-08 08:12:41
问题 I need to identify the P(rocess) ID of an executing batch file from a PowerShell (v1.0) script. Can anyone suggest a way of doing this? Thanks, MagicAndi. 回答1: Well, whether that's possible depends on how you executed the batch file. In general, the only way you could possibly find this out is to look at the command line used to start the batch. If you double-click a batch file in Windows Explorer you'll get a command line like cmd /c ""C:\Users\Me\test.cmd" " In Powershell you can then use

In a vbscript, how can i get the process id of the cmd.exe in which the vb script is running

由 五迷三道 提交于 2019-12-08 06:38:14
问题 within a vb script, I want to assign a variable with the process id of the cmd.exe in which the vb script is running. Is there any command? 回答1: Below is the example VB script procedure returning parent process caption and id: GetParentProcessInfo sCaption, sProcessId MsgBox "Parent Process Caption '" & sCaption & "'" & vbCrLf & "Parent Process Id '" & sProcessId & "'" Sub GetParentProcessInfo(sCaption, sProcessId) With GetObject("winmgmts:\\.\root\CIMV2:Win32_Process.Handle='" & CreateObject

Run python script after another is terminated

由 末鹿安然 提交于 2019-12-08 05:11:15
问题 I have a python script that takes several hours to complete. I usually run it as: python myscript.py arg1 arg2 ... argN 2> log.err > log.out & I'd like to have a shell script that runs several time the same python script (with different parameters). This script has to start the second python script ONLY when the first one has terminated and so on. I think I should use PID of the processes and iteratively check using sleep within some while loops. Any suggestions? The scripts are executed in a

python连接mysql

由 故事扮演 提交于 2019-12-07 23:44:29
from __future__ import division import pymysql coon = pymysql.connect( host = '',user = 'r',passwd = 'bQ', port =,db = '',charset = '' ) f =file('ddd.txt') i = 0 p_id_dic = {} lists = [] cur = coon.cursor() for line in f: i += 1 chunk = line.strip().split('\t') p_id = chunk[0] price = round(float(chunk[2]) / 1, 2) p_id_dic[int(p_id)] = price lists.append(p_id) if i % 1000: sql = "select p_id, pay_price,total_price from map_ugc_core.task_package where p_id in (%s)" % ','.join(lists) cur.execute(sql) res = cur.fetchall() for db_pid, db_price,total_price in res: if abs(db_price - p_id_dic.get(db

Is there a way to link a linux's thread TID and a pthread_t “thread ID”

由 ぃ、小莉子 提交于 2019-12-07 20:55:50
问题 On linux a thread is identified by a pthread_t or a TID. I'm looking for bridges between these two kinds of thread ids: given a pthread_t can I get it's TID ? apparently not without hacking in pthread's internals :( but i'm still asking in case someone has a clean way to do it. given a TID (or PID ), can I get a pthread_t handle to it ? Because the term "thread id" is ambiguous in this context (and in the documentation), a bit of background: The POSIX pthread API defines a pthread_t type, all

MySQL: error on El Capitan OS after Yosemite OS update

由 為{幸葍}努か 提交于 2019-12-07 20:09:18
问题 I have problems with MySQL on my MacBook. I had updated my OS from Yosemite to El Capitan before I installed MySQL server. Now, when I try to run MySQL on Terminal, I got the error like this ERROR! The server quit without updating PID file Anyone can help me please? Thanks a lot! 回答1: Try updating your my.cnf file to set the location of the PID file manually. Here's how you do that. In your Terminal run the following command. ps -ax | grep mysql This will list all the locations of the

jstat的用法

由 ￣綄美尐妖づ 提交于 2019-12-07 15:08:57
jstat的用法 用以判断JVM是否存在内存问题呢？如何判断JVM垃圾回收是否正常？一般的top指令基本上满足不了这样的需求，因为它主要监控的是总体的系统资源，很难定位到 java 应用程序。 Jstat是JDK自带的一个轻量级小工具。全称“Java Virtual Machine statistics monitoring tool”，它位于java的bin目录下，主要利用JVM内建的指令对Java应用程序的资源和性能进行实时的命令行的监控，包括了对Heap size和垃圾回收状况的监控。可见，Jstat是轻量级的、专门针对JVM的工具，非常适用。由于JVM内存设置较大，图中百分比变化不太明显 一个极强的监视VM内存工具。可以用来监视VM内存内的各种堆和非堆的大小及其内存使用量。 jstat工具特别强大，有众多的可选项，详细查看堆内各个部分的使用量，以及加载类的数量。使用时，需加上查看进程的进程id，和所选参数。 执行：cd $JAVA_HOME/bin中执行jstat，注意jstat后一定要跟参数。 语法结构： Usage: jstat -help|-options jstat -<option> [-t] [-h<lines>] <vmid> [<interval> [<count>]] 参数解释： Options — 选项，我们一般使用 -gcutil 查看gc情况
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