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perf cs-etm: Use existing decoder instead of resetting it 

When dumping trace, the decoder is continually deleted and recreated to
decode each buffer. To support both formatted and unformatted trace in
a later commit, the decoder will be configured in advance.

This commit removes the deletion of the decoder and allows the
formatted/unformatted setting to persist.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Al Grant <al.grant@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https //lore.kernel.org/r/20210721150202.32065-6-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2021-07-21 16:02:01 +01:00 committed by Arnaldo Carvalho de Melo
parent b8324f490b
commit 04aaad262c
1 changed files with 7 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
tools/perf/util/cs-etm.c
View File

@ -508,14 +508,11 @@ out:
return ret;
}
static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
static void cs_etm__dump_event(struct cs_etm_queue *etmq,
struct auxtrace_buffer *buffer)
{
int ret;
const char *color = PERF_COLOR_BLUE;
struct cs_etm_decoder_params d_params;
struct cs_etm_trace_params *t_params;
struct cs_etm_decoder *decoder;
size_t buffer_used = 0;
fprintf(stdout, "\n");
@ -523,29 +520,11 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
". ... CoreSight ETM Trace data: size %zu bytes\n",
buffer->size);
/* Use metadata to fill in trace parameters for trace decoder */
t_params = zalloc(sizeof(*t_params) * etm->num_cpu);
if (!t_params)
return;
if (cs_etm__init_trace_params(t_params, etm))
goto out_free;
/* Set decoder parameters to simply print the trace packets */
if (cs_etm__init_decoder_params(&d_params, NULL,
CS_ETM_OPERATION_PRINT))
goto out_free;
decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
if (!decoder)
goto out_free;
do {
size_t consumed;
ret = cs_etm_decoder__process_data_block(
decoder, buffer->offset,
etmq->decoder, buffer->offset,
&((u8 *)buffer->data)[buffer_used],
buffer->size - buffer_used, &consumed);
if (ret)
@ -554,10 +533,7 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
buffer_used += consumed;
} while (buffer_used < buffer->size);
cs_etm_decoder__free(decoder);
out_free:
zfree(&t_params);
cs_etm_decoder__reset(etmq->decoder);
}
static int cs_etm__flush_events(struct perf_session *session,
@ -769,6 +745,7 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm)
/* Set decoder parameters to decode trace packets */
if (cs_etm__init_decoder_params(&d_params, etmq,
dump_trace ? CS_ETM_OPERATION_PRINT :
CS_ETM_OPERATION_DECODE))
goto out_free;
@ -2422,7 +2399,7 @@ static void dump_queued_data(struct cs_etm_auxtrace *etm,
for (i = 0; i < etm->queues.nr_queues; ++i)
list_for_each_entry(buf, &etm->queues.queue_array[i].head, list)
if (buf->reference == event->reference)
cs_etm__dump_event(etm, buf);
cs_etm__dump_event(etm->queues.queue_array[i].priv, buf);
}
static int cs_etm__process_auxtrace_event(struct perf_session *session,
@ -2460,7 +2437,7 @@ static int cs_etm__process_auxtrace_event(struct perf_session *session,
if (dump_trace)
if (auxtrace_buffer__get_data(buffer, fd)) {
cs_etm__dump_event(etm, buffer);
cs_etm__dump_event(etm->queues.queue_array[idx].priv, buffer);
auxtrace_buffer__put_data(buffer);
}
} else if (dump_trace)