Re: [PATCH] kbuild: Disable extra debugging info in .s output

[Masahiro Yamada]

On Fri, Feb 1, 2019 at 7:32 PM Borislav Petkov <bp@xxxxxxxxx> wrote:
>
> On Fri, Feb 01, 2019 at 07:09:36PM +0900, Masahiro Yamada wrote:
> > I provide the result of "perf stat" of the incremental build for you.
>
> One more question: what exactly is that "incremental build" you're
> measuring with?


I meant "make" after you the full build


> Exact command line please.


$ make defconfig
$ make -j8

 [Wait until the full build finished]

$ perf stat --repeat 20 --null make -j8

 [Wait until the perf result is displayed]




> > Without your patch:
> >
> >
> >  Performance counter stats for 'make -j8' (20 runs):
> >
> >        2.721312445 seconds time elapsed
> >           ( +-  1.02% )
> >
> >
> >
> > With you patch:
> >
> >
> >  Performance counter stats for 'make -j8' (20 runs):
> >
> >        5.038521415 seconds time elapsed
> >           ( +-  0.56% )
>
> This can't be a full kernel build.
>
> Thx.
>
> --
> Regards/Gruss,
>     Boris.
>
> Good mailing practices for 400: avoid top-posting and trim the reply.


--
Best Regards
Masahiro Yamada