From: Rusty Russell <rusty@rustcorp.com.au>
To: Andi Kleen <ak@suse.de>
Cc: lkml - Kernel Mailing List <linux-kernel@vger.kernel.org>,
Zachary Amsden <zach@vmware.com>,
Jeremy Fitzhardinge <jeremy@xensource.com>,
Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 8/8] Convert PDA into the percpu section
Date: Wed, 07 Mar 2007 22:55:50 +1100 [thread overview]
Message-ID: <1173268550.32234.3.camel@localhost.localdomain> (raw)
In-Reply-To: <1173227582.4644.74.camel@localhost.localdomain>
On Wed, 2007-03-07 at 11:33 +1100, Rusty Russell wrote:
> On Tue, 2007-03-06 at 20:34 +0100, Andi Kleen wrote:
> > Do you have text size comparisons before/after and possible lmbench?
>
> No, but I'll run them this evening. Last time the size reduction was
> slight, and there was no measurable performance improvement in
> microbenchmarks.
Here are the size results, for a start:
UP:
Before:
size vmlinux
text data bss dec hex filename
3094881 243110 221184 3559175 364f07 vmlinux
After:
size vmlinux
text data bss dec hex filename
3093409 243142 221184 3557735 364967 vmlinux
SMP:
Before:
size vmlinux
text data bss dec hex filename
3222269 318770 237568 3778607 39a82f vmlinux
After:
size vmlinux
text data bss dec hex filename
3221421 314674 237568 3773663 3994df vmlinux
(The data size changes are moving from pda -> percpu, and on SMP
removing the page-aligned PDA).
So, a slight win. lmbench tomorrow...
Rusty.
next prev parent reply other threads:[~2007-03-07 11:56 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-06 12:39 [PATCH 0/8] x86 boot, pda and gdt cleanups Rusty Russell
2007-03-06 12:53 ` [PATCH 1/8] Remove cpu_gdt_table: use boot_gdt_table until migration to per-cpu Rusty Russell
2007-03-06 12:54 ` [PATCH 2/8] Remove NR_CPUS from asm-generic/percpu.h Rusty Russell
2007-03-06 12:55 ` [PATCH 3/8] Use per-cpu variables for GDT, PDA Rusty Russell
2007-03-06 12:57 ` [PATCH 4/8] Cleanup setup_pda Rusty Russell
2007-03-06 12:58 ` [PATCH 5/8] Cleanup GDT access Rusty Russell
2007-03-06 13:00 ` [PATCH 6/8] Allow per-cpu variables to be page-aligned Rusty Russell
2007-03-06 13:01 ` [PATCH 7/8] Page-align the GDT Rusty Russell
2007-03-06 13:03 ` [PATCH 8/8] Convert PDA into the percpu section Rusty Russell
2007-03-06 13:10 ` Ingo Molnar
2007-03-07 0:12 ` Rusty Russell
2007-03-07 0:35 ` Jeremy Fitzhardinge
2007-03-06 18:28 ` Jeremy Fitzhardinge
2007-03-06 19:34 ` Andi Kleen
2007-03-06 18:37 ` Jeremy Fitzhardinge
2007-03-07 0:33 ` Rusty Russell
2007-03-07 11:55 ` Rusty Russell [this message]
2007-03-13 17:15 ` Jeremy Fitzhardinge
2007-03-14 2:27 ` Rusty Russell
2007-03-06 13:15 ` [PATCH 6/8] Allow per-cpu variables to be page-aligned Ingo Molnar
2007-03-07 0:16 ` Rusty Russell
2007-03-07 0:44 ` H. Peter Anvin
2007-03-06 18:17 ` Jeremy Fitzhardinge
2007-03-07 0:29 ` Rusty Russell
2007-03-06 18:16 ` [PATCH 5/8] Cleanup GDT access Jeremy Fitzhardinge
2007-03-06 18:14 ` [PATCH 3/8] Use per-cpu variables for GDT, PDA Jeremy Fitzhardinge
2007-03-06 13:21 ` [PATCH 2/8] Remove NR_CPUS from asm-generic/percpu.h Ingo Molnar
2007-03-06 13:20 ` [PATCH 1/8] Remove cpu_gdt_table: use boot_gdt_table until migration to per-cpu Ingo Molnar
2007-03-06 13:26 ` Ingo Molnar
2007-03-07 0:22 ` Rusty Russell
2007-03-13 20:48 ` [PATCH 0/8] x86 boot, pda and gdt cleanups Jeremy Fitzhardinge
2007-03-14 2:25 ` Rusty Russell
2007-03-14 4:39 ` Jeremy Fitzhardinge
2007-03-14 6:54 ` Rusty Russell
2007-03-14 23:55 ` Rusty Russell
2007-03-15 1:57 ` Jeremy Fitzhardinge
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