linux-kernel - Re: [PATCH] kernel/sched/topology: Clarify root domain(s) debug string

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Message-ID: <20180525115240.GA678@localhost.localdomain>
Date:   Fri, 25 May 2018 13:52:40 +0200
From:   Juri Lelli <juri.lelli@...hat.com>
To:     Dietmar Eggemann <dietmar.eggemann@....com>
Cc:     peterz@...radead.org, mingo@...hat.com,
        Patrick Bellasi <patrick.bellasi@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel/sched/topology: Clarify root domain(s) debug
 string

On 25/05/18 13:35, Dietmar Eggemann wrote:

[...]

> 
> Looks good to me. Probably especially helpful when setting up exclusive
> cpusets.
> 
> Juno with big and little exclusive cpuset:
> 
> ...
> [  124.231333] CPU1 attaching sched-domain(s):
> [  124.235482]  domain-0: span=1-2 level=MC
> [  124.239382]   groups: 1:{ span=1 }, 2:{ span=2 }
> [  124.243969] CPU2 attaching sched-domain(s):
> [  124.248112]  domain-0: span=1-2 level=MC
> [  124.251998]   groups: 2:{ span=2 }, 1:{ span=1 }
> [  124.256585] root domain span: 1-2 (max cpu_capacity = 1024)
> [  124.262150] CPU0 attaching sched-domain(s):
> [  124.266307]  domain-0: span=0,3-5 level=MC
> [  124.270366]   groups: 0:{ span=0 cap=446 }, 3:{ span=3 cap=446 }, 4:{
> span=4 cap=446 }, 5:{ span=5 cap=446 }
> [  124.280131] CPU3 attaching sched-domain(s):
> [  124.284273]  domain-0: span=0,3-5 level=MC
> [  124.288334]   groups: 3:{ span=3 cap=446 }, 4:{ span=4 cap=446 }, 5:{
> span=5 cap=446 }, 0:{ span=0 cap=446 }
> [  124.298096] CPU4 attaching sched-domain(s):
> [  124.302239]  domain-0: span=0,3-5 level=MC
> [  124.306298]   groups: 4:{ span=4 cap=446 }, 5:{ span=5 cap=446 }, 0:{
> span=0 cap=446 }, 3:{ span=3 cap=446 }
> [  124.316063] CPU5 attaching sched-domain(s):
> [  124.320205]  domain-0: span=0,3-5 level=MC
> [  124.324265]   groups: 5:{ span=5 cap=446 }, 0:{ span=0 cap=446 }, 3:{
> span=3 cap=446 }, 4:{ span=4 cap=446 }
> [  124.334031] root domain span: 0,3-5 (max cpu_capacity = 446)

Yep, that's similar to how I noticed.

Thanks for testing.

Best,

- Juri