From: Ingo Molnar <mingo@kernel.org>
To: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
David Ahern <dsahern@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@gmail.com>
Subject: Re: [PATCH] perf auto-dep: Speed up feature tests by building them in parallel
Date: Mon, 30 Sep 2013 21:04:34 +0200 [thread overview]
Message-ID: <20130930190434.GA3427@gmail.com> (raw)
In-Reply-To: <20130930175342.GI10293@ghostprotocols.net>
* Arnaldo Carvalho de Melo <acme@ghostprotocols.net> wrote:
> Em Mon, Sep 30, 2013 at 10:34:27AM -0700, Linus Torvalds escreveu:
> > On Mon, Sep 30, 2013 at 10:12 AM, Arnaldo Carvalho de Melo
> > <acme@ghostprotocols.net> wrote:
> > >
> > > Checking why that strlcpy failed...
> >
> > I don't think glibc does strlcpy. It's not a standard C function, and
>
> My concern was more about the thinking: ``Is this red "OFF" thing a
> problem? I feel so much more confortable when all entries have nice
> green "on" lights...''
Yeah, so I think we should add our internal implementation of strlcpy() as
a __weak function instead - if the libc does not provide then we provide a
fallback.
That should get rid of another ~50 msecs of build overhead, as failed
feature tests are the most expensive ones.
Agreed?
Thanks,
Ingo
next prev parent reply other threads:[~2013-09-30 19:04 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-12 13:38 [GIT PULL] perf fixes Ingo Molnar
2013-09-12 18:03 ` Linus Torvalds
2013-09-12 18:10 ` Linus Torvalds
2013-09-12 18:43 ` Arnaldo Carvalho de Melo
2013-09-12 19:12 ` Arnaldo Carvalho de Melo
2013-09-12 19:13 ` Linus Torvalds
2013-09-12 19:55 ` Ingo Molnar
2013-09-12 19:58 ` David Ahern
2013-09-12 20:02 ` Arnaldo Carvalho de Melo
2013-09-12 20:31 ` Ingo Molnar
2013-09-12 20:43 ` Ingo Molnar
2013-09-15 9:10 ` [PATCH] perf test-hack: Split out feature tests to cache them and to build them in parallel Ingo Molnar
2013-09-30 16:42 ` [PATCH] perf auto-dep: Speed up feature tests by building " Ingo Molnar
2013-09-30 17:12 ` Arnaldo Carvalho de Melo
2013-09-30 17:27 ` Arnaldo Carvalho de Melo
2013-09-30 17:30 ` Arnaldo Carvalho de Melo
2013-09-30 17:36 ` Arnaldo Carvalho de Melo
2013-09-30 17:39 ` Arnaldo Carvalho de Melo
2013-09-30 17:46 ` Arnaldo Carvalho de Melo
2013-09-30 18:02 ` Arnaldo Carvalho de Melo
2013-09-30 19:15 ` Ingo Molnar
2013-09-30 19:09 ` Ingo Molnar
2013-09-30 17:34 ` Linus Torvalds
2013-09-30 17:53 ` Arnaldo Carvalho de Melo
2013-09-30 19:04 ` Ingo Molnar [this message]
2013-10-01 11:34 ` [PATCH] perf autodep: Remove strlcpy feature check, add __weak strlcpy implementation Ingo Molnar
2013-10-01 12:04 ` Ingo Molnar
2013-10-01 12:48 ` Arnaldo Carvalho de Melo
2013-10-01 12:51 ` [PATCH] perf autodep: Speed up the 'all features are present' case Ingo Molnar
2013-10-01 14:46 ` [PATCH] perf tools: Speed up git-version test on re-make Ingo Molnar
2013-10-02 6:47 ` Namhyung Kim
2013-10-02 6:50 ` Ingo Molnar
2013-10-02 8:04 ` Namhyung Kim
2013-10-01 15:27 ` [PATCH] perf autodep: Remove strlcpy feature check, add __weak strlcpy implementation Ingo Molnar
2013-10-01 15:29 ` [PATCH] perf tools: Speed up the final link Ingo Molnar
2013-10-01 7:04 ` [PATCH] perf auto-dep: Speed up feature tests by building them in parallel Geert Uytterhoeven
2013-10-01 8:38 ` Ingo Molnar
2013-10-02 6:05 ` Namhyung Kim
2013-10-02 6:28 ` Ingo Molnar
2013-10-02 9:26 ` Jiri Olsa
2013-10-02 10:11 ` Ingo Molnar
2013-09-12 20:18 ` [GIT PULL] perf fixes Ingo Molnar
2013-09-12 20:38 ` Arnaldo Carvalho de Melo
2013-09-12 20:46 ` Ingo Molnar
2013-09-12 21:09 ` David Ahern
2013-09-12 21:18 ` Ingo Molnar
2013-09-12 22:10 ` David Ahern
2013-09-13 5:09 ` Ingo Molnar
2013-09-13 9:32 ` Jean Pihet
2013-09-13 9:45 ` Ingo Molnar
2013-09-13 17:15 ` Jean Pihet
2013-09-12 18:51 ` Linus Torvalds
2013-09-12 20:33 ` Ingo Molnar
2013-09-12 20:38 ` Linus Torvalds
2013-09-12 20:49 ` Ingo Molnar
2013-09-12 20:52 ` Linus Torvalds
2013-09-12 21:01 ` Ingo Molnar
2013-09-12 20:10 ` Ingo Molnar
2013-10-02 7:31 ` [PATCH] tools/perf: Fix double/triple-build of the feature detection logic during 'make install' et al Ingo Molnar
2013-10-02 9:28 ` [PATCH] tools/perf/build: Automatically build in parallel, based on number of CPUs in the system Ingo Molnar
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