linux-kernel - Re: Task group cleanups and optimizations (was: Re: [RFC 00/60] Coscheduling for Linux)

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Message-ID: <20180918134213.GV24124@hirez.programming.kicks-ass.net>
Date:   Tue, 18 Sep 2018 15:42:13 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Jan H. Schönherr <jschoenh@...zon.de>
Cc:     Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        Paul Turner <pjt@...gle.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Rik van Riel <riel@...riel.com>
Subject: Re: Task group cleanups and optimizations (was: Re: [RFC 00/60]
 Coscheduling for Linux)

On Tue, Sep 18, 2018 at 03:22:13PM +0200, Jan H. Schönherr wrote:
> to always restrict tasks in a task group to just one core/node/whatever. On an
> SMT system, you would typically need at most two runqueues for a core; the memory

You forget that SMT4 and SMT8 are fairly common outside of x86.