linux-kernel - Re: [patch] CFS scheduler, -v18

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Message-ID: <20070702155029.GA13241@elte.hu>
Date:	Mon, 2 Jul 2007 17:50:29 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Vegard Nossum <vegard.nossum@...il.com>
Cc:	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [patch] CFS scheduler, -v18


* Vegard Nossum <vegard.nossum@...il.com> wrote:

> Resulting files at
> http://vegard.afraid.org:1104/pub/cfs/
> 
> cfs-debug-info-2007.07.02-15:18:13    Before running program
> cfs-debug-info-2007.07.02-15:19:51    ~10 secs after start
> cfs-debug-info-2007.07.02-15:20:54    ~1 minute after start
> cfs-debug-info-2007.07.02-15:25:52    ~5 minutes after start
> cfs-debug-info-2007.07.02-15:30:54    ~10 minutes after start
> 
> a.out is my program, FahCore_78 is the f@h client.

thx. As an initial matter, could you double-check whether your v18 
kernel source has the patch below applied already?

	Ingo

Index: linux/kernel/sched_fair.c
===================================================================
--- linux.orig/kernel/sched_fair.c
+++ linux/kernel/sched_fair.c
@@ -342,8 +342,9 @@ update_stats_enqueue(struct cfs_rq *cfs_
 		s64 tmp;
 
 		if (se->wait_runtime < 0) {
-			tmp = (0 - se->wait_runtime) << NICE_0_SHIFT;
-			key += (tmp * se->load.inv_weight) >> WMULT_SHIFT;
+			tmp = -se->wait_runtime;
+			key += (tmp * se->load.inv_weight) >>
+					(WMULT_SHIFT - NICE_0_SHIFT);
 		} else {
 			tmp = se->wait_runtime * se->load.weight;
 			key -= tmp >> NICE_0_SHIFT;

-
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