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Re: performance regression with trunk's gengtype on ARM?
- From: Basile Starynkevitch <basile at starynkevitch dot net>
- To: Mikael Pettersson <mikpe at it dot uu dot se>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 29 Aug 2011 07:13:57 +0200
- Subject: Re: performance regression with trunk's gengtype on ARM?
- References: <20058.43986.843436.784684@pilspetsen.it.uu.se>
On Sun, 28 Aug 2011 22:57:54 +0200
Mikael Pettersson <mikpe@it.uu.se> wrote:
> I'm seeing what appears to be a recent massive performance regression
> with trunk's gengtype, as compiled and run in stage 2, on ARM V5TE.
>
> Right now 4.7-20110827's stage2 gengtype has been running for almost
> 10 hours on my ARM build machine, but the process is tiny and no swapping
> occurs. [...]
This is indeed very suspicious (especially since it happens in stage2, not in stage1,
IIUY). Can you ltrace or strace the gengtype process?
You could set GENGTYPE_FLAGS= -v in gcc/Makefile.in to understand more what gengtype is
doing. And gengtype accepts several -v flags.
Cheers.
--
Basile STARYNKEVITCH http://starynkevitch.net/Basile/
email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359
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