diff mbox series

[5/6] perf cs-etm: Use existing decoder instead of resetting it

Message ID 20210713154008.29656-6-james.clark@arm.com (mailing list archive)
State New, archived
Headers show
Series perf cs-etm: Support TRBE (unformatted decoding) | expand

Commit Message

James Clark July 13, 2021, 3:40 p.m. UTC 
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.

Signed-off-by: James Clark <james.clark@arm.com>
---
 tools/perf/util/cs-etm.c | 37 +++++++------------------------------
 1 file changed, 7 insertions(+), 30 deletions(-)

Comments

Mathieu Poirier July 19, 2021, 7:39 p.m. UTC | #1 
On Tue, Jul 13, 2021 at 04:40:07PM +0100, James Clark wrote:
> 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.
> 
> Signed-off-by: James Clark <james.clark@arm.com>
> ---

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

>  tools/perf/util/cs-etm.c | 37 +++++++------------------------------
>  1 file changed, 7 insertions(+), 30 deletions(-)
> 
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 2d07e52ffd3c..760050ea936d 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -508,14 +508,11 @@ static int cs_etm__init_decoder_params(struct cs_etm_decoder_params *d_params,
>  	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,
> @@ -769,7 +745,8 @@ 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,
> -					CS_ETM_OPERATION_DECODE))
> +					dump_trace ? CS_ETM_OPERATION_PRINT :
> +						     CS_ETM_OPERATION_DECODE))
>  		goto out_free;
>  
>  	etmq->decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
> @@ -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)
> -- 
> 2.28.0
>
diff mbox series

Patch

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 2d07e52ffd3c..760050ea936d 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -508,14 +508,11 @@  static int cs_etm__init_decoder_params(struct cs_etm_decoder_params *d_params,
 	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,
@@ -769,7 +745,8 @@  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,
-					CS_ETM_OPERATION_DECODE))
+					dump_trace ? CS_ETM_OPERATION_PRINT :
+						     CS_ETM_OPERATION_DECODE))
 		goto out_free;
 
 	etmq->decoder = cs_etm_decoder__new(etm->num_cpu, &d_params, t_params);
@@ -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)