From: Andi Kleen <andi@firstfloor.org>
To: Stephane Eranian <eranian@google.com>
Cc: Lin Ming <ming.m.lin@intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
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: Mon, 13 Dec 2010 17:51:06 +0100 [thread overview]
Message-ID: <20101213165106.GC11449@basil.fritz.box> (raw)
In-Reply-To: <AANLkTimkXFaB2+zB41-OhWDWu=htvm0UJAoLBJhRvEPg@mail.gmail.com>
> If think there you want something like:
>
> if (cpu == cpumask_first(topology_core_siblings(cpu)) {
> rdmsrl(MSR_IA32_DEBUGCTLMSR, val);
> wrmsrl(MSR_IA32_DEBUGCTLMSR, val | DEBUGCTLMSR_ENABLE_UNCORE_PMI);
> }
You have to be careful with hotplug. The code would need to be rerun
on hotplug. Otherwise the interrupt may end up on a downed CPU.
-Andi
next prev parent reply other threads:[~2010-12-13 16:51 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
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 [this message]
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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