Date: Tue, 19 Sep 2017 14:23:57 +0000 From: Glen Barber <gjb@FreeBSD.org> To: Wolfram Schneider <wosch@FreeBSD.org> Cc: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: Re: svn commit: r50880 - head/share/mk Message-ID: <20170919142357.GD20908@FreeBSD.org> In-Reply-To: <201709191003.v8JA3QSW076795@repo.freebsd.org> References: <201709191003.v8JA3QSW076795@repo.freebsd.org>
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[-- Attachment #1 --] On Tue, Sep 19, 2017 at 10:03:26AM +0000, Wolfram Schneider wrote: > Author: wosch > Date: Tue Sep 19 10:03:26 2017 > New Revision: 50880 > URL: https://svnweb.freebsd.org/changeset/doc/50880 > > Log: > Implement workaround for a parallel doc build > > $ make p-all > > It works for the sub-directories in a given directory. > > On a standard quad core machine the build time goes down > from ca. 20min to 5 minutes. > > PR: 222322 > > Modified: > head/share/mk/doc.project.mk > > Modified: head/share/mk/doc.project.mk > ============================================================================== > --- head/share/mk/doc.project.mk Tue Sep 19 09:57:15 2017 (r50879) > +++ head/share/mk/doc.project.mk Tue Sep 19 10:03:26 2017 (r50880) > @@ -104,3 +104,9 @@ DOC_LOCAL_MK= ${DOC_PREFIX}/${LANGCODE}/share/mk/doc.l > > # Subdirectory glue. > .include "doc.subdir.mk" > + > +# parallel build for target "all" > +NCPU?= 8 > +p-all: > + make -V SUBDIR | sed -E 's/[ ]+$$//' | tr " " "\n" | sed -E 's/^/make -C /' | tr '\n' '\0' | xargs -0 -n1 -P${NCPU} /bin/sh -c > + > Would it be more preferable to use the number of CPUs available on the system, instead of hard-coding a value? Such as: NCPU?= $$(sysctl -n hw.ncpu) This would allow those with fewer than 8 CPUs to not need to specify CPU=n when invoking make(1). On an additional point, is there any reason in particular you did not make parallel builds the default? Glen [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEjRJAPC5sqwhs9k2jAxRYpUeP4pMFAlnBKH0ACgkQAxRYpUeP 4pOh+w/7BcZ2JTYUlH2naL44Nm4C7UkakWJ2RS/mSKYcOQ23V3KvZSeIfA9Tu3E5 hIW5I6OXO38mvA6qgLhFZVc6uYhO4mkAFF3LCm8JKiSYfMVeQKbSWY4NROatqVpY FZcSecnSUxwLYpQu+rCfavRm3BegOVaqdo3zsrawNf/EM6xAZvX6qh+Wxd4I0NII 4nCUyHM7s/xB5yEhpzjnD3R9yHuynNwLCaZeOJOe3FykX65yWcvLzrPZHaER8W/a Q3Bw3k/fkY6udvZgDrCL/cLCWFE7tj3H0a7iZM4IXtDwOm/irSqBFgisO6arUMAm K7fkY+bmxaJGSRcJipv5UuCxqBpDM0jEPi1irtLRBf/Xd1BEDpQrVvQBSOo2LIHv omJ5a67fKQiE9SKkXi6Ger6WdULYKIndG0Ww++U0JyEs/2z2kEpZBK9d00ijEzOK 2yOqkD3nudLIeoAmucMbb5spvg1WGVl11/7M156aI1fzWNs9XQY7iKMAAjUisWDA DHn3pSli8fN4Ls/A0xHhdr2k9G245w1LGndwkyim0jRSvSlO369Bj/JGGQ/BArDo NGDT9CABuP8/7f+bzKki50ACiVbeZoalmJCu8eWFVH9fRO9IzO4yElDDjIo4Oi4h RGPxCRwn/hvMmeFEVgkc8Pqa75aED/+ga3MQ2htupjCvHT9GIjw= =qDzJ -----END PGP SIGNATURE-----
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