On 30 January 2018 at 07:42, Robert Walker robert.walker@arm.com wrote:
Hi,
These patches add support for using perf inject to generate branch events and branch stacks from CoreSight ETM traces.
They apply to the recently submitted perf support for CoreSight trace [1] with the subsequent memory cleanup fix [2]
The first patch is Sebastian's original commits from [3] reworked to apply to the refactored version now upstreamed, with some fixes for branch events and my work on branch stacks posted last November [4], updated with review comments.
Very good. Coincidentally I spent a couple of hours yesterday doing exactly that i.e, rebasing Sebastian's work on top of the new perf tools patchset with a very low level of confidence in the result.
The second patch is a new patch that handles discontinuities in the trace stream, e.g. when the ETM is configured to only trace certain regions or is only active some of the time.
These probably need to be squashed together before going upstream, but I've left them as separate commits for initial review.
Ok, let me look at those - I'll get back to you later this week.
Mathieu
Regards
Rob Walker
tag perf-core-for-mingo-4.16-20180125[3]: https://github.com/Linaro/perf-opencsd/ autoFDO branch [4]: https://lists.linaro.org/pipermail/coresight/2017-November/000955.html
Robert Walker (2): perf tools: inject capabilitity for CoreSight traces perf inject: Emit instruction records on ETM trace discontinuity
Documentation/trace/coresight.txt | 31 ++ tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 68 +++- tools/perf/util/cs-etm-decoder/cs-etm-decoder.h | 2 + tools/perf/util/cs-etm.c | 471 +++++++++++++++++++++--- 4 files changed, 509 insertions(+), 63 deletions(-)
-- 1.9.1
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