I am trying to multiple the values of a matrix. I have both a parallel and sync version. But the parallel version is longer than the sync version. Current the sync takes around 90 seconds and the parallel over 100. Which makes no sense to me. My logic was to split the matrix into 4 parts from the first 4
Tag: parallel-processing
Executing bash script via java in background after ssh connection is closed
I am using java to execute a simple bash script on a remote linux machine. The bash script named “shortoracle.bash” have this script: Simply speaking: create 10 parallel connection that execute queries for 360 seconds. From my java program i execute the following command: The ssh executes the scri…
Run html2text using parallel
I am using html2text from Github in-which I was able to run-it on all the .html files in my folder using for file in *.html; do html2text “$file” > “$file.txt”; done but it’s some-what slow. How can I use html2text with parallel on all my .html files? Answer The original answe…
GNU Parallel – How to capture the output in files with names using input argument
Running the parallel command as: I want the respective output to be in files with names: – log_user1_tag1.txt – log_user2_tag2.txt Answer Figured out the way:
pthread is faster than serial in Windows but slower than serial in Linux
I am trying to run the same C++ parallel code to calculated pi with Monte Carlo algorithm on Windows and Linux with the same number of threads (4 threads with 4 CPUs). While the parallel code is faster than the serial implementation on Windows, it is much slower on Linux. Here is the program: output on Window…
How To Avoid SIGCHLD error In Bash Script That Uses GNU Parallel
I’m running a script.sh in a loop. The script contains a parallel wget command. I’m getting the following error: The loop looks like this: And the line that is causing the error looks like this (omitting options and settings): Research: I’m not an expert with GNU Parallel, but the script see…
Understanding software parallelization on a linux workstation
Summary I am trying to understand the limits of my compute resources when performing multiple simulations. My task is trivial in terms of parallelisation – I need to run a large number of simple independent simulations, i.e. each simulation program does not rely on another for information. Each simulati…
Looping C compilation and running through BASH
I’m trying to compile and run a C code while looping the input file through bash. Here is my code for the bash script I am using to automate it. So what I’m basically trying to do is compile filewithcode.c so that the executable is stored as compiler1, which takes outputnumber1 and readsfilename1.…
Bad File Descriptor on recv from TCP socket
I’ve got a trouble and can’t google out solution, so I hope you’ll be able to help me. There is a client-server application, something like text chat. Server accepts client’s connection, makes new socket for client and sends socket descriptor to it’s child process, that broadcast…
Do i need to install Nvidia’s SDK(CUDA) for OpenCL to detect Nvidia GPU?
I have a code written in C (using opencl specs) to list all the available devices. My PC has an AMD FirePro as well as Nvidia’s Tesla graphics card installed. I first installed AMD-APP-SDK-v3.0-0.113.50-Beta-linux64.tar.bz2 but it didn’t seem to work so thereafter I installed OpenCL™ Runtime 15.1 …