Re: CVS commit: src/usr.bin/make

["J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>]

> On 12. May 2018, at 20:17, Simon J. Gerraty <sjg%netbsd.org@localhost> wrote:
> 
> Module Name:	src
> Committed By:	sjg
> Date:		Sat May 12 18:17:04 UTC 2018
> 
> Modified Files:
> 	src/usr.bin/make: job.c
> 
> Log Message:
> Skip setting wantToken.
> 
> polling the job token pipe adds a lot of overhead
> for little gain.
> For now, just leave wantToken=0
> 
> And avoid busy waiting when no tokens are available and
> no jobs are running.
> 
> Reviewed by: christos
> 
> 
> To generate a diff of this commit:
> cvs rdiff -u -r1.192 -r1.193 src/usr.bin/make/job.c
> 
> Please note that diffs are not public domain; they are subject to the
> copyright notices on the relevant files.
> 

After this commit parallel builds take much longer.  Building
amd64 release with -j16 for example goes from 45 to 380 minutes.

--
J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig (Germany)