| From: |
| Robert Richter <robert.richter@amd.com> |
| To: |
| Peter Zijlstra <a.p.zijlstra@chello.nl> |
| Subject: |
| [PATCH 00/12] perf: introduce model specific events and AMD IBS |
| Date: |
| Tue, 13 Apr 2010 22:23:09 +0200 |
| Message-ID: |
| <1271190201-25705-1-git-send-email-robert.richter@amd.com> |
| Cc: |
| Ingo Molnar <mingo@elte.hu>, Stephane Eranian <eranian@google.com>,
LKML <linux-kernel@vger.kernel.org> |
| Archive‑link: | |
Article |
This patch series introduces model specific events and impments AMD
IBS (Instruction Based Sampling) for perf_events.
IBS is documented here:
BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors
http://support.amd.com/us/Processor_TechDocs/31116.pdf
AMD64 Architecture Programmer's Manual Volume 2: System Programming
http://support.amd.com/us/Processor_TechDocs/24593.pdf
The general approach is to introduce a flag to mark an event as model
specific. With that flag set a model specific ibs (raw) config value
can be passed to the pmu for setup. When there are ibs samples
available, it is sent back as a raw data sample to the userland. So we
have a raw config value and raw sampling data. This requires the
userland to setup ibs and further extract and process sampling data.
Patches 1-8 rework and refactor the code to prepare the ibs
implementation. This is done in patches 9-12.
I will add ibs example code to libpfm4.
-Robert
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