From: Peter Zijlstra <peterz@infradead.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>,
tglx@linutronix.de, mingo@redhat.com, fenghua.yu@intel.com,
tony.luck@intel.com, vikas.shivappa@linux.intel.com,
gavin.hindman@intel.com, jithu.joseph@intel.com, hpa@zytor.com,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination with perf
Date: Thu, 2 Aug 2018 22:13:12 +0200 [thread overview]
Message-ID: <20180802201312.GS2494@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <d64f85e8-98ca-a81d-bf2d-13dd72fc411e@intel.com>
On Thu, Aug 02, 2018 at 01:06:19PM -0700, Dave Hansen wrote:
> On 08/02/2018 12:54 PM, Peter Zijlstra wrote:
> >> I totally understand not wanting to fill the tree with code hijacking
> >> the raw PMU. Is your reaction to this really around not wanting to
> >> start down the slippery slope that ends up with lots of raw PMU "owners"?
> > That and the fact that multiple owner directly contradicts what perf set
> > out to do, provide resource arbitration for the PMU.
> >
> > Not being able to use both perf and this resctl thing at the same time
> > is utter crap. You will not get special dispensation.
>
> Is there something we could do in the middle, like have perf itself be
> in charge of doing all the programming, but the psuedo-locking could
> still _read_ the counters?
perf has all of that.
next prev parent reply other threads:[~2018-08-02 20:28 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-31 19:38 [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination with perf Reinette Chatre
2018-07-31 19:38 ` [PATCH 1/2] perf/x86: Expose PMC hardware reservation Reinette Chatre
2018-07-31 19:38 ` [PATCH 2/2] x86/intel_rdt: Coordinate performance monitoring with perf Reinette Chatre
2018-08-02 12:39 ` [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination " Peter Zijlstra
2018-08-02 16:14 ` Reinette Chatre
2018-08-02 16:18 ` Peter Zijlstra
2018-08-02 16:44 ` Reinette Chatre
2018-08-02 17:37 ` Peter Zijlstra
2018-08-02 18:18 ` Dave Hansen
2018-08-02 19:54 ` Peter Zijlstra
2018-08-02 20:06 ` Dave Hansen
2018-08-02 20:13 ` Peter Zijlstra [this message]
2018-08-02 20:43 ` Reinette Chatre
2018-08-03 10:49 ` Peter Zijlstra
2018-08-03 15:18 ` Reinette Chatre
2018-08-03 15:25 ` Peter Zijlstra
2018-08-03 18:37 ` Reinette Chatre
2018-08-06 19:50 ` Reinette Chatre
2018-08-06 22:12 ` Peter Zijlstra
2018-08-06 23:07 ` Reinette Chatre
2018-08-07 9:36 ` Peter Zijlstra
[not found] ` <ace0bebb-91ab-5d40-e7d7-d72d48302fa8@intel.com>
2018-08-08 1:28 ` Luck, Tony
2018-08-08 5:44 ` Reinette Chatre
2018-08-08 7:41 ` Peter Zijlstra
2018-08-08 15:55 ` Luck, Tony
2018-08-08 16:47 ` Peter Zijlstra
2018-08-08 16:51 ` Reinette Chatre
2018-08-08 7:51 ` Peter Zijlstra
2018-08-08 17:33 ` Reinette Chatre
2018-08-10 16:25 ` Reinette Chatre
2018-08-10 17:52 ` Reinette Chatre
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