diff mbox series

[3/6] perf cs-etm: Only setup queues when they are modified

Message ID 20210713154008.29656-4-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 
Continually creating queues in cs_etm__process_event() is unnecessary.
They only need to be created when a buffer for a new CPU or thread is
encountered. This can be in two places, when building the queues in
advance in cs_etm__process_auxtrace_info(), or in
cs_etm__process_auxtrace_event() when data_queued is false and the
index wasn't available (pipe mode).

This change will allow the 'formatted' decoder setting to applied when
iterating over aux records in a later commit.

Signed-off-by: James Clark <james.clark@arm.com>
---
 tools/perf/util/cs-etm.c | 54 +++++++++++-----------------------------
 1 file changed, 14 insertions(+), 40 deletions(-)

Comments

Mathieu Poirier July 19, 2021, 7:38 p.m. UTC | #1 
On Tue, Jul 13, 2021 at 04:40:05PM +0100, James Clark wrote:
> Continually creating queues in cs_etm__process_event() is unnecessary.
> They only need to be created when a buffer for a new CPU or thread is
> encountered. This can be in two places, when building the queues in
> advance in cs_etm__process_auxtrace_info(), or in
> cs_etm__process_auxtrace_event() when data_queued is false and the
> index wasn't available (pipe mode).
> 
> This change will allow the 'formatted' decoder setting to applied when
> iterating over aux records in a later commit.
> 
> Signed-off-by: James Clark <james.clark@arm.com>
> ---
>  tools/perf/util/cs-etm.c | 54 +++++++++++-----------------------------
>  1 file changed, 14 insertions(+), 40 deletions(-)

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

> 
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 426e99c07ca9..2d07e52ffd3c 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -96,7 +96,6 @@ struct cs_etm_queue {
>  /* RB tree for quick conversion between traceID and metadata pointers */
>  static struct intlist *traceid_list;
>  
> -static int cs_etm__update_queues(struct cs_etm_auxtrace *etm);
>  static int cs_etm__process_queues(struct cs_etm_auxtrace *etm);
>  static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm,
>  					   pid_t tid);
> @@ -564,7 +563,6 @@ static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
>  static int cs_etm__flush_events(struct perf_session *session,
>  				struct perf_tool *tool)
>  {
> -	int ret;
>  	struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
>  						   struct cs_etm_auxtrace,
>  						   auxtrace);
> @@ -574,11 +572,6 @@ static int cs_etm__flush_events(struct perf_session *session,
>  	if (!tool->ordered_events)
>  		return -EINVAL;
>  
> -	ret = cs_etm__update_queues(etm);
> -
> -	if (ret < 0)
> -		return ret;
> -
>  	if (etm->timeless_decoding)
>  		return cs_etm__process_timeless_queues(etm, -1);
>  
> @@ -898,30 +891,6 @@ static int cs_etm__queue_first_cs_timestamp(struct cs_etm_auxtrace *etm,
>  	return ret;
>  }
>  
> -static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm)
> -{
> -	unsigned int i;
> -	int ret;
> -
> -	for (i = 0; i < etm->queues.nr_queues; i++) {
> -		ret = cs_etm__setup_queue(etm, &etm->queues.queue_array[i], i);
> -		if (ret)
> -			return ret;
> -	}
> -
> -	return 0;
> -}
> -
> -static int cs_etm__update_queues(struct cs_etm_auxtrace *etm)
> -{
> -	if (etm->queues.new_data) {
> -		etm->queues.new_data = false;
> -		return cs_etm__setup_queues(etm);
> -	}
> -
> -	return 0;
> -}
> -
>  static inline
>  void cs_etm__copy_last_branch_rb(struct cs_etm_queue *etmq,
>  				 struct cs_etm_traceid_queue *tidq)
> @@ -2395,7 +2364,6 @@ static int cs_etm__process_event(struct perf_session *session,
>  				 struct perf_sample *sample,
>  				 struct perf_tool *tool)
>  {
> -	int err = 0;
>  	u64 sample_kernel_timestamp;
>  	struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
>  						   struct cs_etm_auxtrace,
> @@ -2414,12 +2382,6 @@ static int cs_etm__process_event(struct perf_session *session,
>  	else
>  		sample_kernel_timestamp = 0;
>  
> -	if (sample_kernel_timestamp || etm->timeless_decoding) {
> -		err = cs_etm__update_queues(etm);
> -		if (err)
> -			return err;
> -	}
> -
>  	/*
>  	 * Don't wait for cs_etm__flush_events() in per-thread/timeless mode to start the decode. We
>  	 * need the tid of the PERF_RECORD_EXIT event to assign to the synthesised samples because
> @@ -2476,6 +2438,7 @@ static int cs_etm__process_auxtrace_event(struct perf_session *session,
>  		int fd = perf_data__fd(session->data);
>  		bool is_pipe = perf_data__is_pipe(session->data);
>  		int err;
> +		int idx = event->auxtrace.idx;
>  
>  		if (is_pipe)
>  			data_offset = 0;
> @@ -2490,6 +2453,11 @@ static int cs_etm__process_auxtrace_event(struct perf_session *session,
>  		if (err)
>  			return err;
>  
> +		err = cs_etm__setup_queue(etm, &etm->queues.queue_array[idx],
> +					  idx);
> +		if (err)
> +			return err;
> +
>  		if (dump_trace)
>  			if (auxtrace_buffer__get_data(buffer, fd)) {
>  				cs_etm__dump_event(etm, buffer);
> @@ -2732,6 +2700,7 @@ static int cs_etm__queue_aux_fragment(struct perf_session *session, off_t file_o
>  	struct perf_record_auxtrace *auxtrace_event;
>  	union perf_event auxtrace_fragment;
>  	__u64 aux_offset, aux_size;
> +	__u32 idx;
>  
>  	struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
>  						   struct cs_etm_auxtrace,
> @@ -2793,8 +2762,13 @@ static int cs_etm__queue_aux_fragment(struct perf_session *session, off_t file_o
>  
>  		pr_debug3("CS ETM: Queue buffer size: %#"PRI_lx64" offset: %#"PRI_lx64
>  			  " tid: %d cpu: %d\n", aux_size, aux_offset, sample->tid, sample->cpu);
> -		return auxtrace_queues__add_event(&etm->queues, session, &auxtrace_fragment,
> -						  file_offset, NULL);
> +		err = auxtrace_queues__add_event(&etm->queues, session, &auxtrace_fragment,
> +						 file_offset, NULL);
> +		if (err)
> +			return err;
> +
> +		idx = auxtrace_event->idx;
> +		return cs_etm__setup_queue(etm, &etm->queues.queue_array[idx], idx);
>  	}
>  
>  	/* Wasn't inside this buffer, but there were no parse errors. 1 == 'not found' */
> -- 
> 2.28.0
>
diff mbox series

Patch

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 426e99c07ca9..2d07e52ffd3c 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -96,7 +96,6 @@  struct cs_etm_queue {
 /* RB tree for quick conversion between traceID and metadata pointers */
 static struct intlist *traceid_list;
 
-static int cs_etm__update_queues(struct cs_etm_auxtrace *etm);
 static int cs_etm__process_queues(struct cs_etm_auxtrace *etm);
 static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm,
 					   pid_t tid);
@@ -564,7 +563,6 @@  static void cs_etm__dump_event(struct cs_etm_auxtrace *etm,
 static int cs_etm__flush_events(struct perf_session *session,
 				struct perf_tool *tool)
 {
-	int ret;
 	struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
 						   struct cs_etm_auxtrace,
 						   auxtrace);
@@ -574,11 +572,6 @@  static int cs_etm__flush_events(struct perf_session *session,
 	if (!tool->ordered_events)
 		return -EINVAL;
 
-	ret = cs_etm__update_queues(etm);
-
-	if (ret < 0)
-		return ret;
-
 	if (etm->timeless_decoding)
 		return cs_etm__process_timeless_queues(etm, -1);
 
@@ -898,30 +891,6 @@  static int cs_etm__queue_first_cs_timestamp(struct cs_etm_auxtrace *etm,
 	return ret;
 }
 
-static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm)
-{
-	unsigned int i;
-	int ret;
-
-	for (i = 0; i < etm->queues.nr_queues; i++) {
-		ret = cs_etm__setup_queue(etm, &etm->queues.queue_array[i], i);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-
-static int cs_etm__update_queues(struct cs_etm_auxtrace *etm)
-{
-	if (etm->queues.new_data) {
-		etm->queues.new_data = false;
-		return cs_etm__setup_queues(etm);
-	}
-
-	return 0;
-}
-
 static inline
 void cs_etm__copy_last_branch_rb(struct cs_etm_queue *etmq,
 				 struct cs_etm_traceid_queue *tidq)
@@ -2395,7 +2364,6 @@  static int cs_etm__process_event(struct perf_session *session,
 				 struct perf_sample *sample,
 				 struct perf_tool *tool)
 {
-	int err = 0;
 	u64 sample_kernel_timestamp;
 	struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
 						   struct cs_etm_auxtrace,
@@ -2414,12 +2382,6 @@  static int cs_etm__process_event(struct perf_session *session,
 	else
 		sample_kernel_timestamp = 0;
 
-	if (sample_kernel_timestamp || etm->timeless_decoding) {
-		err = cs_etm__update_queues(etm);
-		if (err)
-			return err;
-	}
-
 	/*
 	 * Don't wait for cs_etm__flush_events() in per-thread/timeless mode to start the decode. We
 	 * need the tid of the PERF_RECORD_EXIT event to assign to the synthesised samples because
@@ -2476,6 +2438,7 @@  static int cs_etm__process_auxtrace_event(struct perf_session *session,
 		int fd = perf_data__fd(session->data);
 		bool is_pipe = perf_data__is_pipe(session->data);
 		int err;
+		int idx = event->auxtrace.idx;
 
 		if (is_pipe)
 			data_offset = 0;
@@ -2490,6 +2453,11 @@  static int cs_etm__process_auxtrace_event(struct perf_session *session,
 		if (err)
 			return err;
 
+		err = cs_etm__setup_queue(etm, &etm->queues.queue_array[idx],
+					  idx);
+		if (err)
+			return err;
+
 		if (dump_trace)
 			if (auxtrace_buffer__get_data(buffer, fd)) {
 				cs_etm__dump_event(etm, buffer);
@@ -2732,6 +2700,7 @@  static int cs_etm__queue_aux_fragment(struct perf_session *session, off_t file_o
 	struct perf_record_auxtrace *auxtrace_event;
 	union perf_event auxtrace_fragment;
 	__u64 aux_offset, aux_size;
+	__u32 idx;
 
 	struct cs_etm_auxtrace *etm = container_of(session->auxtrace,
 						   struct cs_etm_auxtrace,
@@ -2793,8 +2762,13 @@  static int cs_etm__queue_aux_fragment(struct perf_session *session, off_t file_o
 
 		pr_debug3("CS ETM: Queue buffer size: %#"PRI_lx64" offset: %#"PRI_lx64
 			  " tid: %d cpu: %d\n", aux_size, aux_offset, sample->tid, sample->cpu);
-		return auxtrace_queues__add_event(&etm->queues, session, &auxtrace_fragment,
-						  file_offset, NULL);
+		err = auxtrace_queues__add_event(&etm->queues, session, &auxtrace_fragment,
+						 file_offset, NULL);
+		if (err)
+			return err;
+
+		idx = auxtrace_event->idx;
+		return cs_etm__setup_queue(etm, &etm->queues.queue_array[idx], idx);
 	}
 
 	/* Wasn't inside this buffer, but there were no parse errors. 1 == 'not found' */