linux-kernel - [PATCH v2 00/17] perf tools: Coresight: Add CPU-wide trace support

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Date:   Fri, 24 May 2019 11:34:51 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     acme@...nel.org
Cc:     peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, suzuki.poulose@....com, leo.yan@...aro.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        coresight@...ts.linaro.org
Subject: [PATCH v2 00/17] perf tools: Coresight: Add CPU-wide trace support 

This patchset adds support for CoreSight CPU-wide trace scenarios.  More 
specifically it extends the work that was done for per thread scenarios to
handle more than a single trace ID.  It also temporally correlate traces
based on timestamp generated by the tracers so that rendering by the perf
mechanic is ordered.

Everything is based on Arnaldo's perf/core branch (46d4c9a05285).  I will
send another revision when it is rebased to a 5.2 rc candidate.

Before this set:
	# root@...o:/home/linaro# perf record -e cs_etm/@...70000.etr/ -C 2,3 sleep 1
	failed to mmap with 12 (Cannot allocate memory)

After this set:
	# root@...o:/home/linaro# perf record -e cs_etm/@...70000.etr/ -C 2,3 sleep 1
	[ perf record: Captured and wrote 1.352 MB perf.data ]

Regards,
Mathieu

Changes for V2:
* Fixed error condition in function cs_etm_set_option() (Leo)
* Fixed changelog spelling error (Leo).
* Moved from calloc() to malloc() in cs_etm__etmq_get_traceid_queue()
* Got rid of CS_ETM_PACKET_QUEUE_NR macro
* Fixed indentation problem in function cs_etm__process_traceid_queue() (Leo).

Mathieu Poirier (17):
  perf tools: Configure contextID tracing in CPU-wide mode
  perf tools: Configure timestsamp generation in CPU-wide mode
  perf tools: Configure SWITCH_EVENTS in CPU-wide mode
  perf tools: Add handling of itrace start events
  perf tools: Add handling of switch-CPU-wide events
  perf tools: Refactor error path in cs_etm_decoder__new()
  perf tools: Move packet queue out of decoder structure
  perf tools: Fix indentation in function
    cs_etm__process_decoder_queue()
  perf tools: Introduce the concept of trace ID queues
  perf tools: Get rid of unused cpu in struct cs_etm_queue
  perf tools: Move thread to traceid_queue
  perf tools: Move tid/pid to traceid_queue
  perf tools: Use traceID aware memory callback API
  perf tools: Add support for multiple traceID queues
  perf tools: Linking PE contextID with perf thread mechanic
  perf tools: Add notion of time to decoding code
  perf tools: Add support for CPU-wide trace scenarios

 tools/perf/Makefile.config                    |    3 +
 tools/perf/arch/arm/util/cs-etm.c             |  186 ++-
 .../perf/util/cs-etm-decoder/cs-etm-decoder.c |  269 +++--
 .../perf/util/cs-etm-decoder/cs-etm-decoder.h |   39 +-
 tools/perf/util/cs-etm.c                      | 1026 +++++++++++++----
 tools/perf/util/cs-etm.h                      |  103 ++
 6 files changed, 1252 insertions(+), 374 deletions(-)

-- 
2.17.1