From: Stephane Eranian <eranian@google.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@elte.hu, linux-kernel@vger.kernel.org, paulus@samba.org,
robert.richter@amd.com, fweisbec@gmail.com,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [RFC][PATCH 07/11] perf: Provide PERF_SAMPLE_REGS
Date: Wed, 3 Mar 2010 09:49:33 -0800 [thread overview]
Message-ID: <bd4cb8901003030949v3db2db41o9cc1a65d53c370@mail.gmail.com> (raw)
In-Reply-To: <1267637995.25158.96.camel@laptop>
On Wed, Mar 3, 2010 at 9:39 AM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, 2010-03-03 at 09:30 -0800, Stephane Eranian wrote:
>> This assumes struct pt_regs is somehow exported to userland.
>> Is that the case?
>
> I seems to have understood they were, and asm/ptrace.h seems to agree
> with that, it has !__KERNEL__ definitions for struct pt_regs.
>
Seems to be the case, indeed.
>> I would clearly spell out that the REGS are the interrupted REGS,
>> not the overflow REGS. Maybe PERF_SAMPLE_IREGS.
>
> They can be both, for PEBS they are the overflow trap (until PEBS does
> fault) regs.
You're saying without PEBS= interrupted state, with PEBS=overflow state.
That precludes requesting both interrupted + overflow state when PEBS is
enabled. That may be interesting to look at differences, distances (in the IP).
next prev parent reply other threads:[~2010-03-03 17:49 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-03 16:39 [RFC][PATCH 00/11] Another stab at PEBS and LBR support Peter Zijlstra
2010-03-03 16:39 ` [RFC][PATCH 01/11] perf, x86: Remove superfluous arguments to x86_perf_event_set_period() Peter Zijlstra
2010-03-03 16:39 ` [RFC][PATCH 02/11] perf, x86: Remove superfluous arguments to x86_perf_event_update() Peter Zijlstra
2010-03-03 16:39 ` [RFC][PATCH 03/11] perf, x86: Change x86_pmu.{enable,disable} calling convention Peter Zijlstra
2010-03-03 16:39 ` [RFC][PATCH 04/11] perf, x86: Use unlocked bitops Peter Zijlstra
2010-03-03 16:39 ` [RFC][PATCH 05/11] perf: Generic perf_sample_data initialization Peter Zijlstra
2010-03-03 16:49 ` David Miller
2010-03-03 21:14 ` Frederic Weisbecker
2010-03-05 8:44 ` Jean Pihet
2010-03-03 16:39 ` [RFC][PATCH 06/11] perf, x86: PEBS infrastructure Peter Zijlstra
2010-03-03 17:38 ` Robert Richter
2010-03-03 17:42 ` Peter Zijlstra
2010-03-04 8:50 ` Robert Richter
2010-03-03 16:39 ` [RFC][PATCH 07/11] perf: Provide PERF_SAMPLE_REGS Peter Zijlstra
2010-03-03 17:30 ` Stephane Eranian
2010-03-03 17:39 ` Peter Zijlstra
2010-03-03 17:49 ` Stephane Eranian [this message]
2010-03-03 17:55 ` David Miller
2010-03-03 18:18 ` Stephane Eranian
2010-03-03 19:18 ` Peter Zijlstra
2010-03-04 2:59 ` Ingo Molnar
2010-03-04 12:58 ` Arnaldo Carvalho de Melo
2010-03-03 22:02 ` Frederic Weisbecker
2010-03-04 8:58 ` Peter Zijlstra
2010-03-04 11:04 ` Ingo Molnar
2010-03-03 16:39 ` [RFC][PATCH 08/11] perf, x86: Implement simple LBR support Peter Zijlstra
2010-03-03 21:52 ` Stephane Eranian
2010-03-04 8:58 ` Peter Zijlstra
2010-03-03 21:57 ` Stephane Eranian
2010-03-04 8:58 ` Peter Zijlstra
2010-03-04 17:54 ` Stephane Eranian
2010-03-04 18:18 ` Peter Zijlstra
2010-03-04 20:23 ` Peter Zijlstra
2010-03-04 20:57 ` Stephane Eranian
2010-03-03 16:39 ` [RFC][PATCH 09/11] perf, x86: Implement PERF_SAMPLE_BRANCH_STACK Peter Zijlstra
2010-03-03 21:08 ` Frederic Weisbecker
2010-03-03 16:39 ` [RFC][PATCH 10/11] perf, x86: use LBR for PEBS IP+1 fixup Peter Zijlstra
2010-03-03 18:05 ` Masami Hiramatsu
2010-03-03 19:37 ` Peter Zijlstra
2010-03-03 21:11 ` Masami Hiramatsu
2010-03-03 21:50 ` Stephane Eranian
2010-03-04 8:57 ` Peter Zijlstra
2010-03-09 1:41 ` Stephane Eranian
2010-03-03 16:39 ` [RFC][PATCH 11/11] perf, x86: Clean up IA32_PERF_CAPABILITIES usage Peter Zijlstra
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