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Re: Parallel build consequences from GNU make

From: SF Markus Elfring
Subject: Re: Parallel build consequences from GNU make
Date: Mon, 1 Feb 2016 15:55:27 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1

> I tried to use the following command for parallel build but it is not working.
> *Make **–**j 7 **–**f makefile.mak build*

I find your impression strange.

> When I execute the above command, I can see that the GNU make is utilizing
> 40%-60% of CPU.

Which tools did you use to check the run time situation?

> When I execute the same command using *clearmake**(clearmake **–**j 7 
> makefile.mak build)***process,

Do you suggest a software comparison with a tool like the ClearCase build 

> I can see that it is always utilizing 80-100% of CPU.

Are there any more details to inspect?

> Which informs that the GNU make process is not using the parallelism.

Would you like to reconsider your conclusion once more?

Do you distinguish how many computation resources are needed by the build tool
itself in comparison what is really required for the execution of commands
from make recipes?


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