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From: Ingo Molnar <mingo@kernel.org>
To: Chen <hi3766691@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	torvalds@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: Plumbers: Tweaking scheduler policy micro-conf RFP
Date: Wed, 23 May 2012 17:03:59 +0200	[thread overview]
Message-ID: <20120523150359.GB26974@gmail.com> (raw)
In-Reply-To: <CANQmPXhN92i9E8HqxE7pqz=kOwtn5Mz0crW37H6qs+XD420Yuw@mail.gmail.com>


* Chen <hi3766691@gmail.com> wrote:

> Still you are just trying to said that your code is not bloated?
> Up to over 500K for a cpu scheduler. Laughing

Where did you get that 500K from? You are off from the truth 
almost by an order of magnitude.

Here's the scheduler size on Linus's latest tree, on 64-bit 
defconfig's:

 $ size kernel/sched/built-in.o 
   text	   data	    bss	    dec	    hex	filename
  83611	  10404	   2524	  96539	  1791b	kernel/sched/built-in.o

That's SMP+NUMA, i.e. everything included.

The !NUMA !SMP UP scheduler, if you are on a size starved 
ultra-embedded device, is even smaller, just 22K:

 $ size kernel/sched/built-in.o 
   text	   data	    bss	    dec	    hex	filename
  19882	   2218	    148	  22248	   56e8	kernel/sched/built-in.o

Thanks,

	Ingo

  parent reply	other threads:[~2012-05-23 15:04 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-11 16:16 Plumbers: Tweaking scheduler policy micro-conf RFP Vincent Guittot
2012-05-11 16:26 ` Steven Rostedt
2012-05-11 16:38   ` Vincent Guittot
2012-05-15  8:41     ` Juri Lelli
2012-05-15  0:53 ` Paul E. McKenney
2012-05-15  8:02 ` Vincent Guittot
2012-05-15  8:34   ` mou Chen
2012-05-15  9:07     ` Vincent Guittot
2012-05-15  9:17       ` Pantelis Antoniou
2012-05-15 10:28         ` Peter Zijlstra
2012-05-15 11:35           ` Pantelis Antoniou
2012-05-15 11:58             ` Peter Zijlstra
2012-05-15 12:32               ` Pantelis Antoniou
2012-05-15 12:59                 ` Peter Zijlstra
2012-05-19 14:58               ` Luming Yu
2012-05-15 20:26             ` valdis.kletnieks
2012-05-15 20:33               ` Peter Zijlstra
2012-05-16 12:08               ` Pantelis Antoniou
2012-05-15 12:23   ` Peter Zijlstra
2012-05-15 12:27     ` Peter Zijlstra
2012-05-15 12:57     ` Vincent Guittot
2012-05-15 13:00       ` Peter Zijlstra
2012-05-15 15:05         ` Vincent Guittot
2012-05-15 15:19           ` Paul E. McKenney
2012-05-15 15:27             ` Vincent Guittot
2012-05-15 15:35           ` Peter Zijlstra
2012-05-15 15:45             ` Peter Zijlstra
2012-05-16 18:30             ` Peter Zijlstra
2012-05-19 17:08               ` Linus Torvalds
2012-05-19 22:55                 ` Peter Zijlstra
2012-05-22  2:38                   ` Chen
2012-05-22  5:14                     ` Chen
2012-05-30  7:20                       ` Ingo Molnar
2012-05-23 15:03                     ` Ingo Molnar [this message]
2012-05-23 15:43                       ` Joe Perches
2012-05-23 15:50                         ` Ingo Molnar
2012-05-23 15:56                           ` Joe Perches
2012-05-23 15:59                             ` Ingo Molnar
2012-05-29 18:17                           ` [PATCH] printk: Shrink printk_sched buffer size, eliminate it when !CONFIG_PRINTK Joe Perches
2012-06-05 16:04                             ` Joe Perches
2012-06-06  7:25                               ` Ingo Molnar
2012-06-06  7:33                             ` Ingo Molnar
2012-06-06  7:42                               ` Joe Perches
2012-05-19 23:13                 ` Plumbers: Tweaking scheduler policy micro-conf RFP Peter Zijlstra
2012-05-19 23:22                 ` Peter Zijlstra
2012-05-21  7:16                   ` Ingo Molnar
2012-05-21 16:56                     ` Linus Torvalds
2012-05-16 18:49             ` Vaidyanathan Srinivasan
2012-05-16 19:40               ` Peter Zijlstra
2012-05-16 21:20             ` Vincent Guittot
     [not found]             ` <20120518161817.GE18312@e103034-lin.cambridge.arm.com>
2012-05-18 16:24               ` Morten Rasmussen
2012-05-18 16:39                 ` Peter Zijlstra
2012-05-18 16:46                 ` Pantelis Antoniou
2012-05-15 16:30           ` Vaidyanathan Srinivasan
2012-05-15 18:13             ` Vincent Guittot

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