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Date:      Sat, 14 Sep 2013 17:06:17 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Eitan Adler <lists@eitanadler.com>
Cc:        freebsd-sparc64 <freebsd-sparc64@freebsd.org>, "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, Ian Lepore <ian@freebsd.org>, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>
Subject:   Re: Patch for Cross-Reference Phandles
Message-ID:  <CAJ-Vmo=_7oBjyrkAw=-mYzOgQr_GL0K1C%2B78u%2BmQRbxm6Nrjtw@mail.gmail.com>
In-Reply-To: <CAF6rxgmiYxEEBtK2Rt0-PoKfu8MP6gow%2B-Ncx7Ma3LFzGd8e9w@mail.gmail.com>
References:  <522CC7E0.9060508@freebsd.org> <5231D8A6.9080501@freebsd.org> <20130914133155.GA32845@alchemy.franken.de> <52346D71.4080407@freebsd.org> <1379173405.1197.7.camel@revolution.hippie.lan> <20130914172735.GX68682@funkthat.com> <1379181341.1197.26.camel@revolution.hippie.lan> <CAJ-Vmonk_cjc%2BwfCqsHdVESMvRMQTP4c2myK9jZr_%2B59GmWLQQ@mail.gmail.com> <CAF6rxgmiYxEEBtK2Rt0-PoKfu8MP6gow%2B-Ncx7Ma3LFzGd8e9w@mail.gmail.com>

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On 14 September 2013 17:04, Eitan Adler <lists@eitanadler.com> wrote:


> With an explicit zeroing:
>
>    text    data     bss     dec     hex filename
>    1572     484      16 2072     818 a.out
>
> Without:
>
>    text    data     bss     dec     hex filename
>    1572     484      16 2072     818 a.out
>

This is exactly the opposite of what I see with kernel code though. Eg,
kern_umtx.c and it's very large up-front allocated array. Same as the
upfront array of KTR entries for early boot tracing.

Try bumping it to something stupid like 65536 and retest?

Is this a gcc-4.2 versus clang difference?

Thanks,



-adrian



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