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Questions tagged [htop]

htop is an interactive process viewer for Linux. It is a text-mode application (for console or X terminals) and requires ncurses.

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Debian: Cannot fork (Memory Issue)

Recently my processes started to randomly die with an out of memory exception. Furthermore the restart script for those processes printed: ./start.sh: 4: ./start.sh: Cannot fork The script looks like this: #!/bin/sh #EU1 while : do if ! screen…
Jalau
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With an n core machine why does htop continously claim only 1 process running?

While reading about htop: "In the top right corner, htop shows the total number of processes and how many of them are running." If I have an 8 core machine (seen above), and I'm currently running over 100 processes, why is htop always…
Trevor Hickey
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htop reporting Tomcat 8.5 as consuming 4GB when I've set -Xmx1024M

I have configured my Tomcat instance to not use more than 1GB of RAM by setting the following in setenv.sh: $ cat /opt/tomcat8.5/bin/setenv.sh #!/bin/sh export JAVA_OPTS="-Djava.awt.headless=true -server -Xms48m -Xmx1024M…
Marcus Junius Brutus
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What causes an openmp program to run some threads in D state for large dataset size?

I am implementing an OpenMP multithreaded program on following machine. x86_64, On-line CPU(s) list: 0-23 Thread(s) per core: 2 Core(s) per socket: 6 Socket(s): 2 It is a multithreaded clustering program. It shows expected…
Hardik Malhotra
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Single threaded Java application - htop shows 14 rows

I have a simple single-threaded application in Java. Surprisingly, when I run it and open htop, I see some 14 child entries, as captured in the following screenshot. What do these entries represent?
Dušan Rychnovský
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htop cross compiled for arm, getting the error "Error opening terminal: console." when htop is executed

cross compiled htop for arm, when htop is executed on the target, I am getting the error "Error opening terminal: console." can anyone help what could be the issue ?
enthu
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ubuntu. How run echo script in cron?

I want to log my system from htop. How run this script in cron? echo q | htop | aha --black --line-fix > htop.html
user2497209
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htop and OpenMP threads

In my main function I set: omp_set_num_threads(20); which tells OpenMP to use 20 threads (have 40 threads available). I then execute my code which contains the directive: #pragma omp parallel for shared(x,y,z) for the main for loop, and monitor…
user1938803
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Slurm starting more jobs than I ask

I am running a job on a multinode cluster with slurm, OpenMPI, and python (anaconda with MKL). When I submit the job it all seems to work as expected. However, if I login to one of the nodes running the job and use htop to see the running processes…
gex
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Does Socket.IO forks or spawns a new process when run?

I have a node application that uses Socket.IO for the messaging. And I run it using node --expose_gc /path/to/app.js Now, when I check on the htop utility, I noticed that instead of 1, I am getting multiple processes of the same command. Can…
Aldee
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Get thread Id for a process programmatically that matches htop's corresponding pid

I have seen that in htop's tree mode my multithreaded program has several processes under it. I know they are thread ids. But this id doesn't match the thread id that was returned by the pthread_create function. int _id =…
Tahlil
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measure CPU usage per second of a dynamically linked library

I have a sample application which uses a dynamically linked library library.so. I was measuring CPU usage of the sample application with the top command. But it shows CPU usage of both sample app and library.so per second. But I want to see the CPU…
Tahlil
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How does htop display work?

I want to write a program that displays its output in the shell like htop does, as opposed to just running the program and using the watch command. I have looked through the htop source code and am still a little lost. Is there a output beyond tty…
yeahwhatever10
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Go not using cpu fully

I've been playing around with a simple raytracer in go that has been working pretty neatly so far. I'm using multiple goroutines to render different parts of the image, which then place their results into a shared film. Against my expectations, my…
panmari
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"used memory" high, but seems inaccurate - ksysguardd compared to htop?

I'm monitoring a remote machine using ksysguardd, and it reports a flat unchanging timeline of 3.6 gigs, with free memory of .20 (the machine has 3.85 gigs available) Yet with htop a range of 400-600 / 3830MB is used.(Which it signifies by a full…
Orangeman555
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