Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
I am using Scientific linux. I am using simulation toolkit Geant4. For this, I am using terminal to run and compile the program (GCC). I have core i5 processor. For running the program, how can I use all the four cores for it so that I can increase the speed???
make -j4 will only speed up the compiling, not the program itself.
As I can see it Geant4 uses C++, so you have to learn how to do proper multithreading in C++ and in which way you can use that knowledge with the Geant4 framework. Since I neither program in C++ nor know much about Geant4 I can't help you with that.
If you want the program to make use of your four cores you need Geant4-MT. The make -j4 option is only to speed up the compilation (creation) time of the program. And that is a one time proces. Until there is a new version of course and you want to use the new functions or get rid of a annoying bug, then you have to compile the new program ones.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.