On Fri, May 24, 2019 at 11:34:51AM -0600, Mathieu Poirier wrote:
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@juno:/home/linaro# perf record -e cs_etm/@20070000.etr/ -C 2,3 sleep 1 failed to mmap with 12 (Cannot allocate memory)
After this set: # root@juno:/home/linaro# perf record -e cs_etm/@20070000.etr/ -C 2,3 sleep 1 [ perf record: Captured and wrote 1.352 MB perf.data ]
I have tested this patch set on Juno and DB410c boards, FWIW:
Tested-by: Leo Yan leo.yan@linaro.org
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