[Developers] Problems with make -j

Peter Diener diener at cct.lsu.edu
Mon May 21 11:48:24 CDT 2007


On Sun, 20 May 2007, Erik Schnetter wrote:

> Sometimes when I build a Cactus configuration with "make -j4", the "-j4" 
> option is ignored, and make builds sequentially.  I think this occurs mostly 
> when the CST stage needs to run.
> Has anybody observed this as well?  Do you know what the cause could be?

I have seen this as well. And I agree with the observation that it happens 
when the CST is run.

> Maybe related is the fact that, when configuring, Cactus picks up the options 
> "-fds 3,4", which are used by make to communicate between sub-makes to ensure 
> that no more than 4 processes are running at the same time.  Could this maybe 
> confuse make?

I have no idea...



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