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From: Leo Yan <leo.yan@linaro.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Coresight ML <coresight@lists.linaro.org>
Cc: Robert Walker <robert.walker@arm.com>,
	Mike Leach <mike.leach@linaro.org>, Leo Yan <leo.yan@linaro.org>
Subject: [PATCH v3 5/8] perf cs-etm: Rename CS_ETM_TRACE_ON to CS_ETM_DISCONTINUITY
Date: Tue, 11 Dec 2018 15:38:25 +0800
Message-ID: <1544513908-16805-6-git-send-email-leo.yan@linaro.org> (raw)
In-Reply-To: <1544513908-16805-1-git-send-email-leo.yan@linaro.org>

TRACE_ON element is used at the beginning of trace, it also can be
appeared in the middle of trace data to indicate discontinuity; for
example, it's possible to see multiple TRACE_ON elements in the trace
stream if the trace is being limited by address range filtering.

Furthermore, except TRACE_ON element is for discontinuity, NO_SYNC and
EO_TRACE also can be used to indicate discontinuity, though they are
used for different scenarios for trace is interrupted.

This patch is to rename sample type CS_ETM_TRACE_ON to
CS_ETM_DISCONTINUITY, firstly the new name describes more closely the
purpose of the packet; secondly this is a preparation for other output
elements which also cause the trace discontinuity thus they can share
the same one packet type.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Robert Walker <robert.walker@arm.com>
---
 tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 10 +++++-----
 tools/perf/util/cs-etm-decoder/cs-etm-decoder.h |  2 +-
 tools/perf/util/cs-etm.c                        | 12 ++++++------
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
index 97b39b1..1039f364 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -390,11 +390,11 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder,
 }
 
 static ocsd_datapath_resp_t
-cs_etm_decoder__buffer_trace_on(struct cs_etm_decoder *decoder,
-				const uint8_t trace_chan_id)
+cs_etm_decoder__buffer_discontinuity(struct cs_etm_decoder *decoder,
+					   const uint8_t trace_chan_id)
 {
 	return cs_etm_decoder__buffer_packet(decoder, trace_chan_id,
-					     CS_ETM_TRACE_ON);
+					     CS_ETM_DISCONTINUITY);
 }
 
 static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(
@@ -412,8 +412,8 @@ static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(
 	case OCSD_GEN_TRC_ELEM_NO_SYNC:
 		break;
 	case OCSD_GEN_TRC_ELEM_TRACE_ON:
-		resp = cs_etm_decoder__buffer_trace_on(decoder,
-						       trace_chan_id);
+		resp = cs_etm_decoder__buffer_discontinuity(decoder,
+							    trace_chan_id);
 		break;
 	case OCSD_GEN_TRC_ELEM_INSTR_RANGE:
 		resp = cs_etm_decoder__buffer_range(decoder, elem,
diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
index 3819a04..a272317 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.h
@@ -25,7 +25,7 @@ struct cs_etm_buffer {
 enum cs_etm_sample_type {
 	CS_ETM_EMPTY,
 	CS_ETM_RANGE,
-	CS_ETM_TRACE_ON,
+	CS_ETM_DISCONTINUITY,
 };
 
 enum cs_etm_isa {
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index ffc4fe5..cea3158 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -562,8 +562,8 @@ static inline int cs_etm__t32_instr_size(struct cs_etm_queue *etmq,
 
 static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet)
 {
-	/* Returns 0 for the CS_ETM_TRACE_ON packet */
-	if (packet->sample_type == CS_ETM_TRACE_ON)
+	/* Returns 0 for the CS_ETM_DISCONTINUITY packet */
+	if (packet->sample_type == CS_ETM_DISCONTINUITY)
 		return 0;
 
 	return packet->start_addr;
@@ -572,8 +572,8 @@ static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet)
 static inline
 u64 cs_etm__last_executed_instr(const struct cs_etm_packet *packet)
 {
-	/* Returns 0 for the CS_ETM_TRACE_ON packet */
-	if (packet->sample_type == CS_ETM_TRACE_ON)
+	/* Returns 0 for the CS_ETM_DISCONTINUITY packet */
+	if (packet->sample_type == CS_ETM_DISCONTINUITY)
 		return 0;
 
 	return packet->end_addr - packet->last_instr_size;
@@ -972,7 +972,7 @@ static int cs_etm__sample(struct cs_etm_queue *etmq)
 		bool generate_sample = false;
 
 		/* Generate sample for tracing on packet */
-		if (etmq->prev_packet->sample_type == CS_ETM_TRACE_ON)
+		if (etmq->prev_packet->sample_type == CS_ETM_DISCONTINUITY)
 			generate_sample = true;
 
 		/* Generate sample for branch taken packet */
@@ -1148,7 +1148,7 @@ static int cs_etm__run_decoder(struct cs_etm_queue *etmq)
 					 */
 					cs_etm__sample(etmq);
 					break;
-				case CS_ETM_TRACE_ON:
+				case CS_ETM_DISCONTINUITY:
 					/*
 					 * Discontinuity in trace, flush
 					 * previous branch stack
-- 
2.7.4


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  parent reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-11  7:38 [PATCH v3 0/8] perf cs-etm: Correct packets handling Leo Yan
2018-12-11  7:38 ` [PATCH v3 1/8] perf cs-etm: Correct packets swapping in cs_etm__flush() Leo Yan
2018-12-11  7:38 ` [PATCH v3 2/8] perf cs-etm: Avoid stale branch samples when flush packet Leo Yan
2018-12-11  7:38 ` [PATCH v3 3/8] perf cs-etm: Remove unused 'trace_on' in cs_etm_decoder Leo Yan
2018-12-12 18:41   ` Mathieu Poirier
2018-12-11  7:38 ` [PATCH v3 4/8] perf cs-etm: Refactor enumeration cs_etm_sample_type Leo Yan
2018-12-12 18:41   ` Mathieu Poirier
2018-12-11  7:38 ` Leo Yan [this message]
2018-12-11  7:38 ` [PATCH v3 6/8] perf cs-etm: Treat NO_SYNC element as trace discontinuity Leo Yan
2018-12-13 12:38   ` Arnaldo Carvalho de Melo
2018-12-13 12:41     ` Arnaldo Carvalho de Melo
2018-12-13 13:09       ` leo.yan
2018-12-13 13:21         ` Arnaldo Carvalho de Melo
2018-12-13 13:23           ` leo.yan
2018-12-13 13:26           ` Arnaldo Carvalho de Melo
2018-12-13 13:31             ` leo.yan
2018-12-11  7:38 ` [PATCH v3 7/8] perf cs-etm: Treat EO_TRACE " Leo Yan
2018-12-11  7:38 ` [PATCH v3 8/8] perf cs-etm: Generate branch sample for exception packet Leo Yan
2018-12-12 18:45 ` [PATCH v3 0/8] perf cs-etm: Correct packets handling Mathieu Poirier
2018-12-13 13:11   ` Arnaldo Carvalho de Melo

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