From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Stephane Eranian <eranian@google.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Lin Ming <ming.m.lin@intel.com>,
Ingo Molnar <mingo@elte.hu>, Andi Kleen <andi@firstfloor.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/7] perf: Check if HT is supported and enabled
Date: Tue, 04 Jan 2011 14:44:35 +0100 [thread overview]
Message-ID: <1294148675.2016.139.camel@laptop> (raw)
In-Reply-To: <AANLkTinGmgB7YhRjnsGMjj2knDuJ8XFps9oyW4+EGOr5@mail.gmail.com>
On Tue, 2011-01-04 at 14:38 +0100, Stephane Eranian wrote:
> My solution at the time (2.6.30) was to do:
> ht_enabled = cpumask_weight(__get_cpu_var(cpu_sibling_map)) > 1;
Won't that report a machine a HT disabled when you offline a sibling?
Which kinda defeats the purpose of our usage here, since we need to know
it before either sibling comes online.
next prev parent reply other threads:[~2011-01-04 13:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-27 15:36 [PATCH 4/7] perf: Check if HT is supported and enabled Lin Ming
[not found] ` <AANLkTimp9VgD4qhOVmq-k1Ckzti9eeV8pf6Jvt5YB6nx@mail.gmail.com>
2010-12-28 8:51 ` Lin Ming
2011-01-03 10:58 ` Peter Zijlstra
2011-01-03 15:21 ` Andi Kleen
2011-01-03 19:53 ` H. Peter Anvin
2011-01-04 11:10 ` Peter Zijlstra
2011-01-04 13:38 ` Stephane Eranian
2011-01-04 13:44 ` Peter Zijlstra [this message]
2011-01-04 13:52 ` Stephane Eranian
2011-01-04 13:58 ` Peter Zijlstra
2011-01-04 15:35 ` Stephane Eranian
2011-01-04 19:00 ` H. Peter Anvin
2011-01-05 5:45 ` Lin Ming
2011-01-05 10:08 ` Peter Zijlstra
2011-01-04 18:55 ` Valdis.Kletnieks
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