From: Andi Kleen <andi@firstfloor.org>
To: "Luck\, Tony" <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
David Carrillo-Cisneros <davidcc@google.com>,
Vikas Shivappa <vikas.shivappa@linux.intel.com>, "Shivappa\,
Vikas" <vikas.shivappa@intel.com>,
Stephane Eranian <eranian@google.com>,
linux-kernel <linux-kernel@vger.kernel.org>, x86 <x86@kernel.org>,
"hpa\@zytor.com" <hpa@zytor.com>, Ingo Molnar <mingo@kernel.org>,
"Peter Zijlstra" <peterz@infradead.org>, "Shankar\,
Ravi V" <ravi.v.shankar@intel.com>, "Yu\,
Fenghua" <fenghua.yu@intel.com>, "Kleen\,
Andi" <andi.kleen@intel.com>, "Anvin\,
H Peter" <h.peter.anvin@intel.com>
Subject: Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes
Date: Wed, 01 Feb 2017 16:35:21 -0800 [thread overview]
Message-ID: <87inotjupi.fsf@firstfloor.org> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F3A2A8947@ORSMSX114.amr.corp.intel.com> (Tony Luck's message of "Wed, 1 Feb 2017 20:08:08 +0000")
"Luck, Tony" <tony.luck@intel.com> writes:
> 9) Measure per logical CPU (pick active RMID in same precedence for task/cpu as CAT picks CLOSID)
> 10) Put multiple CPUs into a group
I'm not sure this is a real requirement. It's just an optimization,
right? If you can assign policies to threads, you can implicitly set it
per CPU through affinity (or the other way around).
The only benefit would be possibly less context switch overhead,
but if all the thread (including idle) assigned to a CPU have the
same policy it would have the same results.
I suspect dropping this would likely simplify the interface significantly.
-Andi
next prev parent reply other threads:[~2017-02-02 0:35 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-06 21:59 [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Vikas Shivappa
2017-01-06 21:59 ` [PATCH 01/12] Documentation, x86/cqm: Intel Resource Monitoring Documentation Vikas Shivappa
2017-01-06 21:59 ` [PATCH 02/12] x86/cqm: Remove cqm recycling/conflict handling Vikas Shivappa
2017-01-06 21:59 ` [PATCH 03/12] x86/rdt: Add rdt common/cqm compile option Vikas Shivappa
2017-01-16 18:05 ` Thomas Gleixner
2017-01-17 17:25 ` Shivappa Vikas
2017-01-06 21:59 ` [PATCH 04/12] x86/cqm: Add Per pkg rmid support Vikas Shivappa
2017-01-16 18:15 ` [PATCH 04/12] x86/cqm: Add Per pkg rmid support\ Thomas Gleixner
2017-01-17 19:11 ` Shivappa Vikas
2017-01-06 21:59 ` [PATCH 05/12] x86/cqm,perf/core: Cgroup support prepare Vikas Shivappa
2017-01-17 12:11 ` Thomas Gleixner
2017-01-17 12:31 ` Peter Zijlstra
2017-01-18 2:14 ` Shivappa Vikas
2017-01-17 13:46 ` Thomas Gleixner
2017-01-17 20:22 ` Shivappa Vikas
2017-01-17 21:31 ` Thomas Gleixner
2017-01-17 15:26 ` Peter Zijlstra
2017-01-17 20:27 ` Shivappa Vikas
2017-01-06 21:59 ` [PATCH 06/12] x86/cqm: Add cgroup hierarchical monitoring support Vikas Shivappa
2017-01-17 14:07 ` Thomas Gleixner
2017-01-06 22:00 ` [PATCH 07/12] x86/rdt,cqm: Scheduling support update Vikas Shivappa
2017-01-17 21:58 ` Thomas Gleixner
2017-01-17 22:30 ` Shivappa Vikas
2017-01-06 22:00 ` [PATCH 08/12] x86/cqm: Add support for monitoring task and cgroup together Vikas Shivappa
2017-01-17 16:11 ` Thomas Gleixner
2017-01-06 22:00 ` [PATCH 09/12] x86/cqm: Add RMID reuse Vikas Shivappa
2017-01-17 16:59 ` Thomas Gleixner
2017-01-18 0:26 ` Shivappa Vikas
2017-01-06 22:00 ` [PATCH 10/12] perf/core,x86/cqm: Add read for Cgroup events,per pkg reads Vikas Shivappa
2017-01-06 22:00 ` [PATCH 11/12] perf/stat: fix bug in handling events in error state Vikas Shivappa
2017-01-06 22:00 ` [PATCH 12/12] perf/stat: revamp read error handling, snapshot and per_pkg events Vikas Shivappa
2017-01-17 17:31 ` [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes Thomas Gleixner
2017-01-18 2:38 ` Shivappa Vikas
2017-01-18 8:53 ` Thomas Gleixner
2017-01-18 9:56 ` Peter Zijlstra
2017-01-19 19:59 ` Shivappa Vikas
2017-01-18 19:41 ` Shivappa Vikas
2017-01-18 21:03 ` David Carrillo-Cisneros
2017-01-19 17:41 ` Thomas Gleixner
2017-01-20 7:37 ` David Carrillo-Cisneros
2017-01-20 8:30 ` Thomas Gleixner
2017-01-20 20:27 ` David Carrillo-Cisneros
2017-01-18 21:16 ` Yu, Fenghua
2017-01-19 2:09 ` David Carrillo-Cisneros
2017-01-19 16:58 ` David Carrillo-Cisneros
2017-01-19 17:54 ` Thomas Gleixner
2017-01-19 2:21 ` Vikas Shivappa
2017-01-19 6:45 ` Stephane Eranian
2017-01-19 18:03 ` Thomas Gleixner
2017-01-20 2:32 ` Vikas Shivappa
2017-01-20 7:58 ` David Carrillo-Cisneros
2017-01-20 13:28 ` Thomas Gleixner
2017-01-20 20:11 ` David Carrillo-Cisneros
2017-01-20 21:08 ` Shivappa Vikas
2017-01-20 21:44 ` David Carrillo-Cisneros
2017-01-20 23:51 ` Shivappa Vikas
2017-02-08 10:13 ` Peter Zijlstra
2017-01-23 9:47 ` Thomas Gleixner
2017-01-23 11:30 ` Peter Zijlstra
2017-02-01 20:08 ` Luck, Tony
2017-02-01 23:12 ` David Carrillo-Cisneros
2017-02-02 17:39 ` Luck, Tony
2017-02-02 19:33 ` Luck, Tony
2017-02-02 20:20 ` Shivappa Vikas
2017-02-02 20:22 ` David Carrillo-Cisneros
2017-02-02 23:41 ` Luck, Tony
2017-02-03 1:40 ` David Carrillo-Cisneros
2017-02-03 2:14 ` David Carrillo-Cisneros
2017-02-03 17:52 ` Luck, Tony
2017-02-03 21:08 ` David Carrillo-Cisneros
2017-02-03 22:24 ` Luck, Tony
2017-02-07 8:08 ` Stephane Eranian
2017-02-07 18:52 ` Luck, Tony
2017-02-08 19:31 ` Stephane Eranian
2017-02-07 20:10 ` Shivappa Vikas
2017-02-17 13:41 ` Thomas Gleixner
2017-02-06 18:54 ` Luck, Tony
2017-02-06 21:22 ` Luck, Tony
2017-02-06 21:36 ` Shivappa Vikas
2017-02-06 21:46 ` David Carrillo-Cisneros
2017-02-06 22:16 ` David Carrillo-Cisneros
2017-02-06 23:27 ` Luck, Tony
2017-02-07 0:33 ` David Carrillo-Cisneros
2017-02-02 0:35 ` Andi Kleen [this message]
2017-02-02 1:12 ` David Carrillo-Cisneros
2017-02-02 1:19 ` Andi Kleen
2017-02-02 1:22 ` Yu, Fenghua
2017-02-02 17:51 ` Shivappa Vikas
2017-02-08 10:11 ` Peter Zijlstra
2017-01-20 20:40 ` Shivappa Vikas
2017-01-20 19:31 ` Stephane Eranian
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