GNU make: should -j equal number the number of CPU cores in a system?

Posted by Johan on Stack Overflow See other posts from Stack Overflow or by Johan
Published on 2010-03-23T10:29:10Z Indexed on 2010/03/23 10:33 UTC
Read the original article Hit count: 432

Filed under:

make

|

gnumake

Hi

What is you experience with the make -j flag?

There seem to be some controversial if the jobs are supposed to be equal to the numbers of cores, or if you can maximize the build by adding one extra job that can be cued up while the others "work".

The question is if it is better to use -j4 or -j5?

And have you seen (or done) any benchmarking that support one or the other?

Thanks Johan

Related posts about gnumake

How can I capture GNUMake differences between two directories

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a tricky issue with gmake, when I build from the parent directory, something is different and the make does not build all the .o(s) it needs and fails, but if I cd to the directory and do a make it builds them fine. How can I get GNUmake to tell me the difference between these two runs? There… >>> More
Why does Gnumake from parent directory behave differently?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am stumped as to why when I do a gnumake from the parent directory it behaves incorrectly, whereas, if I cd to the subdirectory and do gnumake it works correctly. In the parent makefile, I have a rule like this: .PHONY: zlib-1.2.5 zlib-1.2.5: @ echo Issuing $(MAKE) in $@ ... pushd zlib-1… >>> More
VERBOSE=yes makefile option on gnu make under cygwin not working for me.

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I use gnumake version GNU Make 3.81 under cygwin on windows. Cygwin version is CYGWIN_NT-6.1-WOW64 1.7.7(0.230/5/3) 2010-08-31 09:58 i686 Cygwin In my makefile used to build the source, when i say VERBOSE=yes, i still do not see detailed commands and options used to compile,link the code. So… >>> More
How to build this project?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I've been a visual studio developer for long and just trying to understand how things are in linux/unix worl. I found an open source project (Gcomandos) in source forge and tried to build it. when I download the source, I get these files: 16/02/2007 05:16 PM 25,987 aclocal.m4 16/02/2007… >>> More
How to write Android.mk for library using Gnu makefile

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to make an Android application using native libraries which use the Gnu build tools (gnu makefile). My question is how to write the "Android.mk" files for these libraries in order to build them using the Android build system or the Android NDK. Thanks in advance >>> More

Developer IT

GNU make: should -j equal number the number of CPU cores in a system? - Developer IT

GNU make: should -j equal number the number of CPU cores in a system?

make

gnumake

Related posts about make

Related posts about gnumake

How can I capture GNUMake differences between two directories

Why does Gnumake from parent directory behave differently?

VERBOSE=yes makefile option on gnu make under cygwin not working for me.

How to build this project?

How to write Android.mk for library using Gnu makefile

Categories cloud