From: Michael Ellerman <michael@ellerman.id.au>
To: Tony Breeds <tony@bakeyournoodle.com>
Cc: LinuxPPC-dev <linuxppc-dev@ozlabs.org>,
Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH] Increase the upper bound on NR_CPUS.
Date: Thu, 29 Nov 2007 15:44:13 +1100 [thread overview]
Message-ID: <1196311453.7875.9.camel@concordia> (raw)
In-Reply-To: <20071129042314.GN24243@bakeyournoodle.com>
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On Thu, 2007-11-29 at 15:23 +1100, Tony Breeds wrote:
> On Thu, Nov 29, 2007 at 03:17:16PM +1100, Michael Ellerman wrote:
> > On Thu, 2007-11-29 at 15:16 +1100, Tony Breeds wrote:
> > > Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
> > >
> > > ---
> > > why not?
> >
> > How big is say a pseries_defconfig with NR_CPUS = 1024 ?
>
> This is a ppc64_defconfig, with a couple of extra patches, and
> NR_CPUS=1024
>
> tony@Sprygo:~/scratch/working$ size ../working_out/arch/powerpc/boot/zImage.{pmac,pseries,iseries} ../working_out/vmlinux
> text data bss dec hex filename
> 3697092 5356 48232 3750680 393b18 ../working_out/arch/powerpc/boot/zImage.pmac
> 3697092 5356 48232 3750680 393b18 ../working_out/arch/powerpc/boot/zImage.pseries
> 8101340 4994176 815544 13911060 d44414 ../working_out/arch/powerpc/boot/zImage.iseries
> 8101340 4994176 815544 13911060 d44414 ../working_out/vmlinux
OK, not too bad for the zImage, but the vmlinux has grown a bit, we
obviously have lots of foo[NR_CPUS].
NR_CPUS = 32 vs 1024
text data bss dec hex filename
7889287 1786256 529248 10204791 9bb677 vmlinux
7901531 4946864 814432 13662827 d07a6b vmlinux
cheers
--
Michael Ellerman
OzLabs, IBM Australia Development Lab
wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)
We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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next prev parent reply other threads:[~2007-11-29 4:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-29 4:16 [PATCH] Increase the upper bound on NR_CPUS Tony Breeds
2007-11-29 4:17 ` Michael Ellerman
2007-11-29 4:23 ` Tony Breeds
2007-11-29 4:44 ` Michael Ellerman [this message]
2007-11-29 6:23 ` Stephen Rothwell
2007-11-29 10:33 ` Arnd Bergmann
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