From: Ingo Molnar <mingo@elte.hu>
To: Lin Ming <ming.m.lin@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
"eranian@gmail.com" <eranian@gmail.com>,
"Gary.Mohr@Bull.com" <Gary.Mohr@bull.com>,
Corey Ashford <cjashfor@linux.vnet.ibm.com>,
"arjan@linux.intel.com" <arjan@linux.intel.com>,
"Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
Paul Mackerras <paulus@samba.org>,
"David S. Miller" <davem@davemloft.net>,
Russell King <rmk+kernel@arm.linux.org.uk>,
Paul Mundt <lethal@linux-sh.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC][PATCH 2/9] perf: core, remove hw_perf_event_init
Date: Tue, 11 May 2010 08:51:31 +0200 [thread overview]
Message-ID: <20100511065131.GA31863@elte.hu> (raw)
In-Reply-To: <1273560280.30322.12.camel@minggr.sh.intel.com>
* Lin Ming <ming.m.lin@intel.com> wrote:
> On Tue, 2010-05-11 at 14:38 +0800, Peter Zijlstra wrote:
> > On Tue, 2010-05-11 at 01:09 +0200, Frederic Weisbecker wrote:
> >
> > > Which module do you have in mind that could register a pmu?
> > > And I don't understand the problem with pci-hotplug.
> >
> > Well, the DRM drivers for one, but basically the trend is for every
> > aspect of the machine to include PMUs of some form, this includes bus
> > bridges and fancy devices.
>
> So the concept of "PMU" is really broadened here?
> Not just only the performance monitoring hardware in CPU?
We _really_ dont want to call it a 'PMU' but 'events coming from an event
source'.
The reason is that a PMU is an existing term that is quite attached to a CPU -
while many hardware events come not from a PMU. Interrupts, error conditions,
hotplug events, etc. etc.
Furthermore, the name 'PMU' is even less correct for software events.
So lets stick with 'events' and with some container that originates them.
(event_source) Ok?
Ingo
next prev parent reply other threads:[~2010-05-11 6:52 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-10 9:26 [RFC][PATCH 2/9] perf: core, remove hw_perf_event_init Lin Ming
2010-05-10 9:40 ` Peter Zijlstra
2010-05-10 10:17 ` Lin Ming
2010-05-10 10:19 ` Peter Zijlstra
2010-05-10 10:22 ` Lin Ming
2010-05-10 12:27 ` Frederic Weisbecker
2010-05-10 12:54 ` Peter Zijlstra
2010-05-10 23:09 ` Frederic Weisbecker
2010-05-11 6:38 ` Peter Zijlstra
2010-05-11 6:44 ` Lin Ming
2010-05-11 6:51 ` Ingo Molnar [this message]
2010-05-11 7:00 ` Lin Ming
2010-05-11 9:18 ` Peter Zijlstra
2010-05-11 6:50 ` Frederic Weisbecker
2010-05-10 9:42 ` Peter Zijlstra
2010-05-10 10:15 ` Lin Ming
2010-05-10 12:24 ` Frederic Weisbecker
2010-05-12 2:11 ` Lin Ming
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