From: Robert Richter <robert.richter@amd.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Stephane Eranian <eranian@google.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/4] perf script: Add script to collect and display IBS samples
Date: Fri, 9 Mar 2012 12:41:12 +0100 [thread overview]
Message-ID: <20120309114112.GR16322@erda.amd.com> (raw)
In-Reply-To: <20120308121924.GA19674@elte.hu>
Ingo,
On 08.03.12 13:19:24, Ingo Molnar wrote:
> I've applied the following 4 kernel patches to perf/x86-ibs:
>
> db98c5faf8cb: perf/x86: Implement 64-bit counter support for IBS
> 4db2e8e6500d: perf/x86: Implement IBS pmu control ops
> b7074f1fbd61: perf/x86: Implement IBS interrupt handler
> 510419435c69: perf/x86: Implement IBS event configuration
>
> and pushed it out.
>
> We can apply any tooling changes to this branch as well.
>
> I suspect being able to skid-less profile on AMD CPUs, using
> IBS, would be a useful feature to users. What would be required
> for that to work?
thanks for putting this into tip. This helps a lot.
I am just looking into skid-less sampling. The effort of attaching the
rip taken from the IBS sample for events 0x76/0xc1 should be feasable.
In between I started the implementation of ibs pseudo events as
described here:
Appendix F Guide to Instruction-Based Sampling
http://support.amd.com/us/Processor_TechDocs/47414_15h_sw_opt_guide.pdf
This includes kernel side filtering and ibs support for the perf tool.
-Robert
--
Advanced Micro Devices, Inc.
Operating System Research Center
next prev parent reply other threads:[~2012-03-09 11:41 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-15 17:23 [PATCH 0/4] perf tools: Add support for IBS Robert Richter
2011-12-15 17:23 ` [PATCH 1/4] perf tool: Parse general/raw events from sysfs Robert Richter
2011-12-21 16:52 ` Robert Richter
2012-01-02 11:07 ` Stephane Eranian
2011-12-15 17:23 ` [PATCH 2/4] perf tools: Add pmu mappings to header information Robert Richter
2011-12-15 17:23 ` [PATCH 3/4] perf script: Add generic perl handler to process events Robert Richter
2011-12-29 20:56 ` [tip:perf/core] " tip-bot for Robert Richter
2011-12-15 17:23 ` [PATCH 4/4] perf script: Add script to collect and display IBS samples Robert Richter
2011-12-15 19:19 ` David Ahern
2011-12-15 23:47 ` Robert Richter
2011-12-23 10:33 ` Ingo Molnar
2011-12-23 11:19 ` Robert Richter
2011-12-23 13:53 ` Ingo Molnar
2011-12-23 14:14 ` Peter Zijlstra
2011-12-23 14:40 ` Ingo Molnar
2011-12-23 16:17 ` Robert Richter
2011-12-23 16:39 ` Ingo Molnar
2011-12-23 16:50 ` Robert Richter
2011-12-30 9:55 ` Ingo Molnar
2012-02-02 11:21 ` Robert Richter
2012-03-08 12:19 ` Ingo Molnar
2012-03-09 11:41 ` Robert Richter [this message]
2012-03-21 18:13 ` Robert Richter
2012-03-22 7:51 ` Ingo Molnar
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