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From: Tejun Heo <tj@kernel.org>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Vikas Shivappa <vikas.shivappa@linux.intel.com>,
	linux-kernel@vger.kernel.org, vikas.shivappa@intel.com,
	x86@kernel.org, hpa@zytor.com, tglx@linutronix.de,
	mingo@kernel.org, peterz@infradead.org, matt.fleming@intel.com,
	will.auld@intel.com, glenn.p.williamson@intel.com,
	kanaka.d.juvva@intel.com
Subject: Re: [PATCH 5/9] x86/intel_rdt: Add new cgroup and Class of service management
Date: Tue, 4 Aug 2015 14:36:59 -0400	[thread overview]
Message-ID: <20150804183659.GG17598@mtj.duckdns.org> (raw)
In-Reply-To: <20150804125520.GA31450@amt.cnet>

Hello,

On Tue, Aug 04, 2015 at 09:55:20AM -0300, Marcelo Tosatti wrote:
...
> Can't "cacheset" helper (similar to taskset) talk to systemd
> to achieve the flexibility you point ?

I don't know.  This is the case in point.  You're now suggesting doing
things completely backwards - a thread of an application talking to
external agent to tweak system management interface so that it can
change the attribute of that thread.  Let's please build a
programmable interface first.  I'm sure there are use cases which
aren't gonna be covered 100% but at the same time I'm sure just simple
inheritable per-thread attribute would cover majority of use cases.
This really isn't that different from CPU affinity after all.  *If* it
turns out that a lot of people yearn for fully hierarchical
enforcement, we sure can do that in the future but at this point it
really looks like an overkill in the wrong direction.

Thanks.

-- 
tejun

  reply	other threads:[~2015-08-04 18:37 UTC|newest]

Thread overview: 85+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-01 22:21 [PATCH V12 0/9] Hot cpu handling changes to cqm, rapl and Intel Cache Allocation support Vikas Shivappa
2015-07-01 22:21 ` [PATCH 1/9] x86/intel_cqm: Modify hot cpu notification handling Vikas Shivappa
2015-07-29 16:44   ` Peter Zijlstra
2015-07-31 23:19     ` Vikas Shivappa
2015-07-01 22:21 ` [PATCH 2/9] x86/intel_rapl: Modify hot cpu notification handling for RAPL Vikas Shivappa
2015-07-01 22:21 ` [PATCH 3/9] x86/intel_rdt: Cache Allocation documentation and cgroup usage guide Vikas Shivappa
2015-07-28 14:54   ` Peter Zijlstra
2015-08-04 20:41     ` Vikas Shivappa
2015-07-28 23:15   ` Marcelo Tosatti
2015-07-29  0:06     ` Vikas Shivappa
2015-07-29  1:28       ` Auld, Will
2015-07-29 19:32         ` Marcelo Tosatti
2015-07-30 17:47           ` Vikas Shivappa
2015-07-30 20:08             ` Marcelo Tosatti
2015-07-31 15:34               ` Marcelo Tosatti
2015-08-02 15:48               ` Martin Kletzander
2015-08-03 15:13                 ` Marcelo Tosatti
2015-08-03 18:22                   ` Vikas Shivappa
2015-07-30 20:22             ` Marcelo Tosatti
2015-07-30 23:03               ` Vikas Shivappa
2015-07-31 14:45                 ` Marcelo Tosatti
2015-07-31 16:41                   ` [summary] " Vikas Shivappa
2015-07-31 18:38                     ` Marcelo Tosatti
2015-07-29 20:07         ` Vikas Shivappa
2015-07-01 22:21 ` [PATCH 4/9] x86/intel_rdt: Add support for Cache Allocation detection Vikas Shivappa
2015-07-28 16:25   ` Peter Zijlstra
2015-07-28 22:07     ` Vikas Shivappa
2015-07-01 22:21 ` [PATCH 5/9] x86/intel_rdt: Add new cgroup and Class of service management Vikas Shivappa
2015-07-28 17:06   ` Peter Zijlstra
2015-07-30 18:01     ` Vikas Shivappa
2015-07-28 17:17   ` Peter Zijlstra
2015-07-30 18:10     ` Vikas Shivappa
2015-07-30 19:44   ` Tejun Heo
2015-07-31 15:12     ` Marcelo Tosatti
2015-08-02 16:23       ` Tejun Heo
2015-08-03 20:32         ` Marcelo Tosatti
2015-08-04 12:55           ` Marcelo Tosatti
2015-08-04 18:36             ` Tejun Heo [this message]
2015-08-04 18:32           ` Tejun Heo
2015-07-31 16:24     ` Vikas Shivappa
2015-08-02 16:31       ` Tejun Heo
2015-08-04 18:50         ` Vikas Shivappa
2015-08-04 19:03           ` Tejun Heo
2015-08-05  2:21             ` Vikas Shivappa
2015-08-05 15:46               ` Tejun Heo
2015-08-06 20:58                 ` Vikas Shivappa
2015-08-07 14:48                   ` Tejun Heo
2015-08-05 12:22         ` Matt Fleming
2015-08-05 16:10           ` Tejun Heo
2015-08-06  0:24           ` Marcelo Tosatti
2015-08-06 20:46             ` Vikas Shivappa
2015-08-07 13:15               ` Marcelo Tosatti
2015-08-18  0:20                 ` Marcelo Tosatti
2015-08-21  0:06                   ` Vikas Shivappa
2015-08-21  0:13                     ` Vikas Shivappa
2015-08-22  2:28                     ` Marcelo Tosatti
2015-08-23 18:47                       ` Vikas Shivappa
2015-08-24 13:06                         ` Marcelo Tosatti
2015-07-01 22:21 ` [PATCH 6/9] x86/intel_rdt: Add support for cache bit mask management Vikas Shivappa
2015-07-28 16:35   ` Peter Zijlstra
2015-07-28 22:08     ` Vikas Shivappa
2015-07-28 16:37   ` Peter Zijlstra
2015-07-30 17:54     ` Vikas Shivappa
2015-07-01 22:21 ` [PATCH 7/9] x86/intel_rdt: Implement scheduling support for Intel RDT Vikas Shivappa
2015-07-29 13:49   ` Peter Zijlstra
2015-07-30 18:16     ` Vikas Shivappa
2015-07-01 22:21 ` [PATCH 8/9] x86/intel_rdt: Hot cpu support for Cache Allocation Vikas Shivappa
2015-07-29 15:53   ` Peter Zijlstra
2015-07-31 23:21     ` Vikas Shivappa
2015-07-01 22:21 ` [PATCH 9/9] x86/intel_rdt: Intel haswell Cache Allocation enumeration Vikas Shivappa
2015-07-29 16:35   ` Peter Zijlstra
2015-08-03 20:49     ` Vikas Shivappa
2015-07-29 16:36   ` Peter Zijlstra
2015-07-30 18:45     ` Vikas Shivappa
2015-07-13 17:13 ` [PATCH V12 0/9] Hot cpu handling changes to cqm, rapl and Intel Cache Allocation support Vikas Shivappa
2015-07-16 12:55   ` Thomas Gleixner
2015-07-24 16:52 ` Thomas Gleixner
2015-07-24 18:28   ` Vikas Shivappa
2015-07-24 18:39     ` Thomas Gleixner
2015-07-24 18:45       ` Vikas Shivappa
2015-07-29 16:47     ` Peter Zijlstra
2015-07-29 22:53       ` Vikas Shivappa
2015-07-24 18:32   ` Vikas Shivappa
  -- strict thread matches above, loose matches on Subject: below --
2015-08-06 21:55 [PATCH V13 0/9] Intel cache allocation and Hot cpu handling changes to cqm, rapl Vikas Shivappa
2015-08-06 21:55 ` [PATCH 5/9] x86/intel_rdt: Add new cgroup and Class of service management Vikas Shivappa
2015-06-25 19:25 [PATCH V11 0/9] Hot cpu handling changes to cqm,rapl and Intel Cache Allocation support Vikas Shivappa
2015-06-25 19:25 ` [PATCH 5/9] x86/intel_rdt: Add new cgroup and Class of service management Vikas Shivappa

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