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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, 30 May 2012 09:20:19 +0200	[thread overview]
Message-ID: <20120530072019.GD2587@gmail.com> (raw)
In-Reply-To: <CANQmPXjiqtDE_4ZmNrtrb9qjB=gyv=NiPr3pdaHFirSs0T3ptQ@mail.gmail.com>


(restored the Cc:s)

* Chen <hi3766691@gmail.com> wrote:

> Oh, Just count the size of the scheduler code yourself, 
> actually 400 - 500k. core.c + fair.c + rt.c + idle_task.c + 
> everything

Only binary code is counted in bytes, source code is counted in 
lines.

20 KLOC for a full-featured CPU scheduler that does everything 
from simple UP scheduling to thousands of CPUs NUMA scheduling, 
cgroups, real-time and more, is entirely reasonable.

As a comparison the VM is 80+ KLOCS, arch/x86/ is 260+ KLOCs, 
networking is 720+ KLOCS and the FS subsystem is over 1 million 
lines of code.

The scheduler is in fact one of the smaller subsystems.

Thanks,

	Ingo

  reply	other threads:[~2012-05-30  7:20 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 [this message]
2012-05-23 15:03                     ` Ingo Molnar
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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