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Date: Fri, 31 Mar 2017 19:00:49 -0700
From: Fenghua Yu <fenghua.yu@intel.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>, Jiri Olsa <jolsa@kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Mike Galbraith <efault@gmx.de>, Shaohua Li <shli@fb.com>,
        lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] x86/intel_rdt: Add cpus_list rdtgroup file
Message-ID: <20170401020048.GF24537@linux.intel.com>
References: <20170329150948.4981-1-jolsa@kernel.org>
 <20170329160825.GA24537@linux.intel.com>
 <20170329161600.GA2506@krava>
 <20170330145947.GA13846@krava>
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On Thu, Mar 30, 2017 at 04:59:47PM +0200, Jiri Olsa wrote:
> On Wed, Mar 29, 2017 at 06:16:00PM +0200, Jiri Olsa wrote:
> > On Wed, Mar 29, 2017 at 09:08:26AM -0700, Fenghua Yu wrote:
> > > On Wed, Mar 29, 2017 at 05:09:48PM +0200, Jiri Olsa wrote:
> > > > While playing with the resctrl interface I found it much
> > > > easier to deal with cpumask list rather than just regular
> > > > cpumask.
> > > 
> > > Could you please explain specifically why and when it's easier
> > > to deal with cpumask list? In programming cases, cpumask
> > > and cpumask list are almost same. And people are working
> > > on higher level tools to control resctrl. The tools can
> > > hide detailed regular cpumask or cpumask list and user
> > > doesn't need to care lower level format of cpumask. So
> > > is it really useful to add cpus_list?
> > 
> > 
> > well I'm not aware about any such tool so I used resctrl
> > interface directly, and in that case it was much simpler
> 
> is there any tool available for this actualy?

Here is a tool created by Marcelo:
https://lwn.net/Articles/710514/

Thanks.

-Fenghua