From: Shivappa Vikas <vikas.shivappa@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Shivappa Vikas <vikas.shivappa@intel.com>,
Vikas Shivappa <vikas.shivappa@linux.intel.com>,
linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
ravi.v.shankar@intel.com, tony.luck@intel.com,
fenghua.yu@intel.com, andi.kleen@intel.com, davidcc@google.com,
eranian@google.com, hpa@zytor.com
Subject: Re: [PATCH 01/14] x86/cqm: Intel Resource Monitoring Documentation
Date: Fri, 23 Dec 2016 13:41:54 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.10.1612231253080.32409@vshiva-Udesk> (raw)
In-Reply-To: <20161223203318.GU3107@twins.programming.kicks-ass.net>
On Fri, 23 Dec 2016, Peter Zijlstra wrote:
>
> Also, the 'whoops you ran out of RMIDs, please reboot' thing totally and
> completely blows.
Well, this is really a hardware limitation. User cannot monitor more events on a
package than # of RMIDs at the *same time*. The 10/14 reuses the RMIDs that are
not monitored anymore. User can monitor more events once he stops monitoring
some..
So we throw error at the read (LAZY mode) or open(NOLAZY mode) ..
>
>
next prev parent reply other threads:[~2016-12-23 21:41 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-16 23:12 [PATCH V4 00/14] Cqm2: Intel Cache Monitoring fixes and enhancements Vikas Shivappa
2016-12-16 23:12 ` [PATCH 01/14] x86/cqm: Intel Resource Monitoring Documentation Vikas Shivappa
2016-12-23 12:32 ` Peter Zijlstra
2016-12-23 19:35 ` Shivappa Vikas
2016-12-23 20:33 ` Peter Zijlstra
2016-12-23 21:41 ` Shivappa Vikas [this message]
2016-12-25 1:51 ` Shivappa Vikas
2016-12-27 7:13 ` David Carrillo-Cisneros
2016-12-27 20:00 ` Andi Kleen
2016-12-27 20:21 ` Shivappa Vikas
2016-12-27 21:38 ` David Carrillo-Cisneros
2016-12-27 21:33 ` David Carrillo-Cisneros
2016-12-27 23:10 ` Andi Kleen
2016-12-28 1:23 ` David Carrillo-Cisneros
2016-12-28 20:03 ` Shivappa Vikas
2016-12-16 23:12 ` [PATCH 02/14] x86/cqm: Remove cqm recycling/conflict handling Vikas Shivappa
2016-12-16 23:12 ` [PATCH 03/14] x86/rdt: Add rdt common/cqm compile option Vikas Shivappa
2016-12-16 23:12 ` [PATCH 04/14] x86/cqm: Add Per pkg rmid support Vikas Shivappa
2016-12-16 23:12 ` [PATCH 05/14] x86/cqm,perf/core: Cgroup support prepare Vikas Shivappa
2016-12-16 23:13 ` [PATCH 06/14] x86/cqm: Add cgroup hierarchical monitoring support Vikas Shivappa
2016-12-16 23:13 ` [PATCH 07/14] x86/rdt,cqm: Scheduling support update Vikas Shivappa
2016-12-16 23:13 ` [PATCH 08/14] x86/cqm: Add support for monitoring task and cgroup together Vikas Shivappa
2016-12-16 23:13 ` [PATCH 09/14] x86/cqm: Add Continuous cgroup monitoring Vikas Shivappa
2016-12-16 23:13 ` [PATCH 10/14] x86/cqm: Add RMID reuse Vikas Shivappa
2016-12-16 23:13 ` [PATCH 11/14] x86/cqm: Add failure on open and read Vikas Shivappa
2016-12-23 11:58 ` David Carrillo-Cisneros
2016-12-16 23:13 ` [PATCH 12/14] perf/core,x86/cqm: Add read for Cgroup events,per pkg reads Vikas Shivappa
2016-12-16 23:13 ` [PATCH 13/14] perf/stat: fix bug in handling events in error state Vikas Shivappa
2016-12-16 23:13 ` [PATCH 14/14] perf/stat: revamp read error handling, snapshot and per_pkg events Vikas Shivappa
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