From: Mike Travis <travis@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>,
Jack Steiner <steiner@sgi.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/4] NR_CPUS: non-x86 arch specific reduction of NR_CPUS usage
Date: Fri, 08 Feb 2008 15:37:38 -0800 [thread overview]
Message-ID: <20080208233738.108449000@polaris-admin.engr.sgi.com> (raw)
Here's another round of removing static allocations of arrays
using NR_CPUS to size the length. The change is to use PER_CPU
variables in place of the static tables.
Based on linux-2.6.git + x86.git
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: cpufreq@lists.linux.org.uk
Cc: Len Brown <len.brown@intel.com>
Cc: linux-acpi@vger.kernel.org
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: oprofile-list@lists.sf.net
Signed-off-by: Mike Travis <travis@sgi.com>
---
(1 - if modules enabled, does not complete boot even
without this patch)
x86_64 configs built and booted:
ingo-stress-test(1)
defconfi
nonuma
nosmp
bigsmp (NR_CPUS=1024, 1024 possible, 8 real)
Other configs built:
arm-default
i386-default
i386-single
i386-smp
ppc-pmac32
ppc-smp
sparc64-default
sparc64-smp
x86_64-8psmp
x86_64-debug
x86_64-default
x86_64-numa
x86_64-single
x86_64-allmodconfig
x86_64-allyesconfig
x86_64-maxsmp (NR_CPUS=4096 MAXNODES=512)
Configs not built due to prior errors:
ia64-sn2
ia64-default
ia64-nosmp
ia64-zx1
s390-default
sparc-default
Memory effects using x86_64-maxsmp
Removes 1MB from permanant data adding 440 bytes to percpu area.
4k-cpus-before 4k-cpus-after
3463036 .bss -98304 -2%
6067456 .data.cacheline_alig -1048576 -17%
48712 .data.percpu +440 +0%
14275505 .text +336 +0%
14275505 Text +336 +0%
8521495 Data -336 +0%
3463036 Bss -98304 -2%
10974520 OtherData -1048576 -9%
48712 PerCpu +440 +0%
39275796 Total -1146104 -2%
--
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next reply other threads:[~2008-02-08 23:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-08 23:37 Mike Travis [this message]
2008-02-08 23:37 ` [PATCH 1/4] cpufreq: change cpu freq tables to per_cpu variables Mike Travis
2008-02-11 2:48 ` Dave Jones
2008-02-11 17:32 ` Mike Travis
2008-02-11 17:56 ` Dave Jones
2008-02-08 23:37 ` [PATCH 2/4] acpi: change cpufreq " Mike Travis
2008-02-12 23:33 ` Andrew Morton
2008-02-13 18:10 ` Mike Travis
2008-02-13 19:43 ` Andrew Morton
2008-02-08 23:37 ` [PATCH 3/4] oprofile: change cpu_buffer from array to per_cpu variable Mike Travis
2008-02-08 23:37 ` [PATCH 4/4] x86: minor cleanup of comments in processor.h Mike Travis
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