linux-kernel - Re: [patch] CFS scheduler, -v6

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Date:	Sun, 29 Apr 2007 12:48:08 +0200
From:	Kasper Sandberg <lkml@...anurb.dk>
To:	tglx@...utronix.de
Cc:	Willy Tarreau <w@....eu>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Gene Heskett <gene.heskett@...il.com>,
	linux-kernel@...r.kernel.org, Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Williams <pwil3058@...pond.net.au>, caglar@...dus.org.tr,
	Mark Lord <lkml@....ca>, Zach Carter <linux@...hcarter.com>,
	buddabrod <buddabrod@...il.com>
Subject: Re: [patch] CFS scheduler, -v6

On Sun, 2007-04-29 at 12:30 +0200, Thomas Gleixner wrote:
> Willy,
<snip>
> As a sidenote: I really wonder if anybody noticed yet, that the whole
> CFS / SD comparison is so ridiculous, that it is not even funny anymore.
> CFS modifies the scheduler and nothing else, SD fiddles all over the
> kernel in interesting ways. 
> 

have you looked at diffstat lately? :)

sd:
 Documentation/sched-design.txt  |  241 +++++++
 Documentation/sysctl/kernel.txt |   14
 Makefile                        |    2
 fs/pipe.c                       |    7
 fs/proc/array.c                 |    2
 include/linux/init_task.h       |    4
 include/linux/sched.h           |   32 -
 kernel/sched.c                  | 1279
+++++++++++++++++++---------------------
 kernel/softirq.c                |    2
 kernel/sysctl.c                 |   26
 kernel/workqueue.c              |    2
 11 files changed, 919 insertions(+), 692 deletions(-)

cfs:
 Documentation/kernel-parameters.txt |   43
 Documentation/sched-design-CFS.txt  |  107 +
 Makefile                            |    2
 arch/i386/kernel/smpboot.c          |   13
 arch/i386/kernel/tsc.c              |    8
 arch/ia64/kernel/setup.c            |    6
 arch/mips/kernel/smp.c              |   11
 arch/sparc/kernel/smp.c             |   10
 arch/sparc64/kernel/smp.c           |   36
 fs/proc/array.c                     |   11
 fs/proc/base.c                      |    2
 fs/proc/internal.h                  |    1
 include/asm-i386/unistd.h           |    3
 include/asm-x86_64/unistd.h         |    4
 include/linux/hardirq.h             |   13
 include/linux/sched.h               |   94 +
 init/main.c                         |    2
 kernel/exit.c                       |    3
 kernel/fork.c                       |    4
 kernel/posix-cpu-timers.c           |   34
 kernel/sched.c                      | 2288
+++++++++---------------------------
 kernel/sched_debug.c                |  152 ++
 kernel/sched_fair.c                 |  601 +++++++++
 kernel/sched_rt.c                   |  184 ++
 kernel/sched_stats.h                |  235 +++
 kernel/sysctl.c                     |   32
 26 files changed, 2062 insertions(+), 1837 deletions(-)


> This is worse than apples and oranges, it's more like apples and
> screwdrivers. 
<snip>
> 
> 	tglx
> 
> 
> 

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