From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>,
Lin Ming <ming.m.lin@intel.com>, Andi Kleen <andi@firstfloor.org>,
Ingo Molnar <mingo@elte.hu>,
Frederic Weisbecker <fweisbec@gmail.com>,
Arjan van de Ven <arjan@infradead.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 2/3 v3] perf: Implement Nehalem uncore pmu
Date: Fri, 10 Dec 2010 18:11:35 +0300 [thread overview]
Message-ID: <20101210151135.GA7695@lenovo> (raw)
In-Reply-To: <1291978335.6803.97.camel@twins>
On Fri, Dec 10, 2010 at 11:52:15AM +0100, Peter Zijlstra wrote:
> On Fri, 2010-12-10 at 11:47 +0100, Peter Zijlstra wrote:
> > On Fri, 2010-12-10 at 00:46 +0100, Stephane Eranian wrote:
> > > Hi,
> > >
> > > So I have tested this patch a bit on WSM and as I expected there
> > > are issues with sampling.
> > >
> > > When HT is on, both siblings CPUs get the interrupt. The HW does not
> > > allow you to only point interrupts to a single HT thread (CPU).
> >
> > Egads, how ugly :/
> >
crap...
...
>
> That would of course need to also grow some smarts to detect if there is
> only 1 sibling online.
>
> CC'ed Cyrill as P4 might have something similar.
>
Yes, Don was testing p4 stuff for me and have reported this issue as well.
I'll check what I can do. Thanks for CC'ing me.
Cyrill
next prev parent reply other threads:[~2010-12-10 15:11 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 5:20 [RFC PATCH 2/3 v3] perf: Implement Nehalem uncore pmu Lin Ming
2010-12-02 5:57 ` Lin Ming
2010-12-07 6:15 ` Lin Ming
2010-12-09 19:17 ` Peter Zijlstra
2010-12-09 19:21 ` Peter Zijlstra
2010-12-09 20:15 ` Stephane Eranian
2010-12-09 20:19 ` Peter Zijlstra
2010-12-09 20:27 ` Stephane Eranian
2010-12-09 23:46 ` Stephane Eranian
2010-12-10 8:31 ` Lin Ming
2010-12-10 10:47 ` Peter Zijlstra
2010-12-10 10:52 ` Peter Zijlstra
2010-12-10 15:11 ` Cyrill Gorcunov [this message]
2010-12-11 5:49 ` Stephane Eranian
2010-12-13 8:27 ` Lin Ming
2010-12-13 16:42 ` Stephane Eranian
2010-12-13 16:51 ` Andi Kleen
2010-12-13 19:04 ` Stephane Eranian
2010-12-10 8:28 ` Lin Ming
2010-12-09 19:24 ` Peter Zijlstra
2010-12-10 8:28 ` Lin Ming
2011-01-13 17:14 ` Stephane Eranian
2011-01-17 1:29 ` Lin Ming
2011-01-17 8:44 ` Stephane Eranian
2011-01-17 10:51 ` Lin Ming
2011-01-17 10:56 ` Stephane Eranian
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