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perf cs-etm: Introduce the concept of trace ID queues

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In an ideal world there is one CPU per cs_etm_queue and as such, one
trace ID per cs_etm_queue.  In the real world CoreSight topologies allow
multiple CPUs to use the same sink, which translates to multiple trace
IDs per cs_etm_queue.

To deal with this a new cs_etm_traceid_queue structure is introduced to
enclose all the information related to a single trace ID, allowing a
cs_etm_queue to handle traces generated by any number of CPUs.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190524173508.29044-10-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Mathieu Poirier
2019-05-24 11:35:00 -06:00
committed by Arnaldo Carvalho de Melo
parent 882f4874ad
commit c7bfa2fd0d
3 changed files with 235 additions and 146 deletions
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4
tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
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@@ -413,8 +413,8 @@ static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(
struct cs_etm_queue *etmq = decoder->data;
struct cs_etm_packet_queue *packet_queue;
/* First get the packet queue */
packet_queue = cs_etm__etmq_get_packet_queue(etmq);
/* First get the packet queue for this traceID */
packet_queue = cs_etm__etmq_get_packet_queue(etmq, trace_chan_id);
if (!packet_queue)
return OCSD_RESP_FATAL_SYS_ERR;