From: Peter Zijlstra <peterz@infradead.org>
To: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
ming.m.lin@intel.com, eranian@google.com
Subject: Re: [rfc 3/3] perf, x86: P4 PMU -- export ABI part of event config to userspace
Date: Wed, 24 Nov 2010 09:32:17 +0100 [thread overview]
Message-ID: <1290587537.2072.430.camel@laptop> (raw)
In-Reply-To: <20101123224800.658686382@openvz.org>
On Wed, 2010-11-24 at 01:46 +0300, Cyrill Gorcunov wrote:
> plain text document attachment (x86-perf-export-abi)
> Due to tight 64 bit size of event config field (where we have to track
> pretty lot of info during event lifetime) some bits are to be exported
> via header into userspace.
>
> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
> CC: Lin Ming <ming.m.lin@intel.com>
> CC: Stephane Eranian <eranian@google.com>
> CC: Peter Zijlstra <peterz@infradead.org>
> ---
>
> Note that I don't like much the idea to export anything into userspace
> but it seems there is no other choise. So there is a minimum which should
> be exported.
Could you say what exactly is exposed to userspace and why?
next prev parent reply other threads:[~2010-11-24 8:32 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-23 22:46 [rfc 0/3] perf,x86: p4 pmu series Cyrill Gorcunov
2010-11-23 22:46 ` [rfc 1/3] perf, x86: P4 PMU - describe config format Cyrill Gorcunov
2010-11-26 10:57 ` Stephane Eranian
2010-11-26 11:14 ` Cyrill Gorcunov
2010-11-26 11:32 ` Cyrill Gorcunov
2010-11-26 11:35 ` Stephane Eranian
2010-11-26 11:58 ` Cyrill Gorcunov
2010-11-26 12:46 ` Stephane Eranian
2010-11-26 13:04 ` Cyrill Gorcunov
2010-11-26 13:06 ` Peter Zijlstra
2010-11-26 13:47 ` Cyrill Gorcunov
2010-11-26 13:10 ` Stephane Eranian
2010-11-26 13:50 ` Cyrill Gorcunov
2010-11-26 13:54 ` Stephane Eranian
2010-11-26 15:27 ` Cyrill Gorcunov
2010-11-26 16:22 ` Stephane Eranian
2010-11-26 17:16 ` Cyrill Gorcunov
2010-11-26 18:05 ` Stephane Eranian
2010-11-26 20:11 ` Cyrill Gorcunov
2010-11-26 12:48 ` Stephane Eranian
2010-11-26 12:59 ` Peter Zijlstra
2010-11-26 13:07 ` Stephane Eranian
2010-11-26 13:07 ` Cyrill Gorcunov
2010-11-23 22:46 ` [rfc 2/3] perf, x86: P4 PMU - Fix unflagged overflows handling v4 Cyrill Gorcunov
2010-11-23 22:46 ` [rfc 3/3] perf, x86: P4 PMU -- export ABI part of event config to userspace Cyrill Gorcunov
2010-11-24 8:32 ` Peter Zijlstra [this message]
2010-11-24 8:48 ` Cyrill Gorcunov
2010-11-24 9:02 ` Peter Zijlstra
2010-11-24 9:39 ` Cyrill Gorcunov
2010-11-24 11:46 ` Cyrill Gorcunov
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