linux-kernel - Re: [PATCH RFC] ioctl based CAT interface

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Date:	Fri, 13 Nov 2015 14:08:53 -0500
From:	Luiz Capitulino <lcapitulino@...hat.com>
To:	Marcelo Tosatti <mtosatti@...hat.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vikas Shivappa <vikas.shivappa@...el.com>,
	Tejun Heo <tj@...nel.org>, Yu Fenghua <fenghua.yu@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] ioctl based CAT interface

On Fri, 13 Nov 2015 14:39:33 -0200
Marcelo Tosatti <mtosatti@...hat.com> wrote:

> Attached is an early version of the ioctl based CAT interface we
> have been working on.

We're also writing a user-space app that can manage reservations
from user-space. It's integrated with util-linux. I'll setup a repo
shortly to share the source code, but here are some examples:

Create a global 2MB reservation:

  # cacheset --create 2M

Create a 2MB reservation on CPUs 0 and 1:

  # cacheset --create 2M --cpu-list 0,1
  # cacheset --create 2M 0x3

Attach pid 4901 to reservation ID 1

  # cacheset --attach 4901 1

Detach pid 4901 to reservation ID 1

  # cacheset --detach 4901 1

Delete reservation ID 1

  # cacheset --delete 1
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