linux-kernel - Re: [tip:sched/urgent] sched: Print sched_group::__cpu_power in sched_domain

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Date:	Mon, 13 Apr 2009 11:53:13 -0700
From:	Tony Luck <tony.luck@...el.com>
To:	mingo@...hat.com, hpa@...or.com, ego@...ibm.com,
	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	tglx@...utronix.de, mingo@...e.hu
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/urgent] sched: Print sched_group::__cpu_power in 
	sched_domain_debug

> --- a/kernel/sched.c
> +++ b/kernel/sched.c
> @@ -6963,7 +6963,8 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
>                cpumask_or(groupmask, groupmask, sched_group_cpus(group));
>
>                cpulist_scnprintf(str, sizeof(str), sched_group_cpus(group));
> -               printk(KERN_CONT " %s", str);
> +               printk(KERN_CONT " %s (__cpu_power = %d)", str,
> +                                               group->__cpu_power);

This has added a lot of clutter to the console log during boot
(especially on large systems).

Here is the start of the diff output comparing old and new console
messages on a 16 cpu machine:

77c77
<   groups: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
---
>   groups: 0 (__cpu_power = 1024) 1 (__cpu_power = 1024) 2 (__cpu_power = 1024) 3 (__cpu_power = 1024) 4 (__cpu_power = 1024) 5 (__cpu_power = 1024) 6 (__cpu_power = 1024) 7 (__cpu_power = 1024) 8 (
__cpu_power = 1024) 9 (__cpu_power = 1024) 10 (__cpu_power = 1024) 11
(__cpu_power = 1024) 12 (__cpu_power = 1024) 13 (__cpu_power = 1024)
14 (__cpu_power = 1024) 15 (__cpu_power = 1024)
80c80
<   groups: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0
---
>   groups: 1 (__cpu_power = 1024) 2 (__cpu_power = 1024) 3 (__cpu_power = 1024) 4 (__cpu_power = 1024) 5 (__cpu_power = 1024) 6 (__cpu_power = 1024) 7 (__cpu_power = 1024) 8 (__cpu_power = 1024) 9 (
__cpu_power = 1024) 10 (__cpu_power = 1024) 11 (__cpu_power = 1024) 12
(__cpu_power = 1024) 13 (__cpu_power = 1024) 14 (__cpu_power = 1024)
15 (__cpu_power = 1024) 0 (__cpu_power = 1024)

continues as each group is reported.

-Tony
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