[oe] [meta-browser][PATCH 1/2] cef3: use PARALLEL_MAKE to control build parallelism

[Julien Brianceau (jbriance)]

I've added -j in http://patches.openembedded.org/patch/100133/, because chromium recipe wasn't fair to other recipes.
For instance, if bitbake is processing 8 compile tasks (incl. chromium) in parallel on a 24 cores machine, 7 recipes will
be compiled with -j${BB_NUMBER_THREADS} whereas chromium will use something like -j24

Just out of my curiosity, what "${PARALLEL_MAKE}" brings compared to "-j${BB_NUMBER_THREADS}" ?


-----Original Message-----
From: openembedded-devel-bounces at lists.openembedded.org [mailto:openembedded-devel-bounces at lists.openembedded.org] On Behalf Of Zoltan Kuscsik
Sent: jeudi 12 novembre 2015 07:08
To: openembedded-devel <openembedded-devel at lists.openembedded.org>
Subject: Re: [oe] [meta-browser][PATCH 1/2] cef3: use PARALLEL_MAKE to control build parallelism

Fair enough.

Z

On 11 November 2015 at 08:22, Andre McCurdy <armccurdy at gmail.com> wrote:

> On Tue, Nov 10, 2015 at 9:48 PM, Zoltan Kuscsik
> <zoltan.kuscsik at linaro.org> wrote:
> > Hi,
> >
> > isn't ninja picking up the number of cores separately? I'm not sure why
> > this is needed.
>
> Without any -j option, ninja will default to "-j (logical_cores + 2)".
>
> The PARALLEL_MAKE value configured in OE isn't just about maximising
> parallelism though (although that's it's common usage), it's also
> useful to limit parallelism and reduce the load on the CPU. If
> PARALLEL_MAKE isn't passed to ninja builds then they will always fully
> load the CPU.
>
> > Z
> >
> > On 11 November 2015 at 05:48, Andre McCurdy <armccurdy at gmail.com> wrote:
> >
> >> Signed-off-by: Andre McCurdy <armccurdy at gmail.com>
> >> ---
> >>  recipes-browser/chromium/cef3_280796.bb | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/recipes-browser/chromium/cef3_280796.bb
> >> b/recipes-browser/chromium/cef3_280796.bb
> >> index d827b8e..6872e5b 100644
> >> --- a/recipes-browser/chromium/cef3_280796.bb
> >> +++ b/recipes-browser/chromium/cef3_280796.bb
> >> @@ -60,5 +60,5 @@ do_qa_configure() {
> >>  }
> >>
> >>  do_compile() {
> >> -    ninja -C out/${CHROMIUM_BUILD_TYPE} -j${BB_NUMBER_THREADS}
> cefsimple
> >> +    ninja -C out/${CHROMIUM_BUILD_TYPE} ${PARALLEL_MAKE} cefsimple
> >>  }
> >> --
> >> 1.9.1
> >>
> >> --
> >> _______________________________________________
> >> Openembedded-devel mailing list
> >> Openembedded-devel at lists.openembedded.org
> >> http://lists.openembedded.org/mailman/listinfo/openembedded-devel
> >>
> >
> >
> >
> > --
> > Zoltan Kuscsik
> >
> > Senior Software Developer, Linaro Digital Home Group
> > email: zoltan.kuscsik at linaro.org
> > IRC: zoli_ on irc.linaro.org
> > --
> > _______________________________________________
> > Openembedded-devel mailing list
> > Openembedded-devel at lists.openembedded.org
> > http://lists.openembedded.org/mailman/listinfo/openembedded-devel
> --
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel at lists.openembedded.org
> http://lists.openembedded.org/mailman/listinfo/openembedded-devel
>



-- 
Zoltan Kuscsik

Senior Software Developer, Linaro Digital Home Group
email: zoltan.kuscsik at linaro.org
IRC: zoli_ on irc.linaro.org
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