DragonFly BSD
DragonFly commits List (threaded) for 2004-12
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cvs commit: src/usr.bin/make

From: Max Okumoto <okumoto@xxxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 9 Dec 2004 17:16:25 -0800 (PST)

okumoto     2004/12/09 17:16:25 PST

DragonFly src repository

  Modified files:
    usr.bin/make         job.c job.h main.c make.c 
  Add code to enforce the paralleism count (-j N) for the entire tree
  of submakes spawned during processing.
  We create a fifo and stuff one character into it for each job we are
  allowed to run.  The name of the fifo is passed to child processes
  in the MAKE_JOBS_FIFO environment variable.
  A make which finds this variable on startup will open the fifo and
  only spawn jobs when it managed to read a token from the fifo.
  When the job completes a token is writen back to the fifo.
  Slave make processes get one token for free: the one their parent
  make got in order to run them.  This makes the make processes
  themselves invisible in the process counts.
  The net effect is that "make -j 12 -s buildworld" will start at
  most 12 jobs at the same time, instead of as previously up to
  65 jobs would get started.
  Taken-from: FreeBSD
  Author: phk
  Revision  Changes    Path
  1.25      +115 -28   src/usr.bin/make/job.c
  1.14      +1 -1      src/usr.bin/make/job.h
  1.30      +3 -0      src/usr.bin/make/main.c
  1.11      +2 -2      src/usr.bin/make/make.c


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