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From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: acme@kernel.org
Cc: suzuki.poulose@arm.com, peterz@infradead.org,
	linux-kernel@vger.kernel.org, mingo@redhat.com,
	leo.yan@linaro.org, jolsa@redhat.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 11/13] perf tools: Modularize main decoder function
Date: Tue, 12 Feb 2019 10:16:16 -0700
Message-ID: <20190212171618.25355-12-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20190212171618.25355-1-mathieu.poirier@linaro.org>

Making the main decoder block modular so that it can be called from
different decoding context (timeless vs. non-timeless), avoiding
to repeat code.

No change in functionality is introduced by this patch.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 tools/perf/util/cs-etm.c | 41 ++++++++++++++++++++++++++++------------
 1 file changed, 29 insertions(+), 12 deletions(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index d2c90b369e7c..cfa686fe223e 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -1491,9 +1491,36 @@ static int cs_etm__set_sample_flags(struct cs_etm_queue *etmq)
 	return 0;
 }
 
+static int cs_etm__decode_data_block(struct cs_etm_queue *etmq)
+{
+	int ret = 0;
+	size_t processed = 0;
+
+	/*
+	 * Packets are decoded and added to the decoder's packet queue
+	 * until the decoder packet processing callback has requested that
+	 * processing stops or there is nothing left in the buffer.  Normal
+	 * operations that stop processing are a timestamp packet or a full
+	 * decoder buffer queue.
+	 */
+	ret = cs_etm_decoder__process_data_block(etmq->decoder,
+						 etmq->offset,
+						 &etmq->buf[etmq->buf_used],
+						 etmq->buf_len,
+						 &processed);
+	if (ret)
+		goto out;
+
+	etmq->offset += processed;
+	etmq->buf_used += processed;
+	etmq->buf_len -= processed;
+
+out:
+	return ret;
+}
+
 static int cs_etm__run_decoder(struct cs_etm_queue *etmq)
 {
-	size_t processed;
 	int err = 0;
 
 	/* Go through each buffer in the queue and decode them one by one */
@@ -1513,20 +1540,10 @@ static int cs_etm__run_decoder(struct cs_etm_queue *etmq)
 
 		/* Run trace decoder until buffer consumed or end of trace */
 		do {
-			processed = 0;
-			err = cs_etm_decoder__process_data_block(
-				etmq->decoder,
-				etmq->offset,
-				&etmq->buf[etmq->buf_used],
-				etmq->buf_len,
-				&processed);
+			err = cs_etm__decode_data_block(etmq);
 			if (err)
 				return err;
 
-			etmq->offset += processed;
-			etmq->buf_used += processed;
-			etmq->buf_len -= processed;
-
 			/* Process each packet in this chunk */
 			while (1) {
 				err = cs_etm_decoder__get_packet(etmq->decoder,
-- 
2.17.1


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Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-12 17:16 [PATCH 00/13] perf tools: CoreSight code cleanup and refactoring Mathieu Poirier
2019-02-12 17:16 ` [PATCH 01/13] perf tools: Remove unused structure field "state" Mathieu Poirier
2019-02-12 17:16 ` [PATCH 02/13] perf tools: Remove unused structure field "time" and "timestamp" Mathieu Poirier
2019-02-12 17:16 ` [PATCH 03/13] perf tools: Fix wrong return values in error path Mathieu Poirier
2019-02-12 17:16 ` [PATCH 04/13] perf tools: Introducing function cs_etm_decoder__init_dparams() Mathieu Poirier
2019-02-12 17:16 ` [PATCH 05/13] perf tools: Fix memory leak in error path Mathieu Poirier
2019-02-12 17:16 ` [PATCH 06/13] perf tools: Introducing function cs_etm__init_trace_params() Mathieu Poirier
2019-02-12 17:16 ` [PATCH 07/13] perf tools: Fix erroneous comment Mathieu Poirier
2019-02-12 17:16 ` [PATCH 08/13] perf tools: Cleaning up function cs_etm__alloc_queue() Mathieu Poirier
2019-02-12 17:16 ` [PATCH 09/13] perf tools: Rethink kernel address initialisation Mathieu Poirier
2019-02-12 17:16 ` [PATCH 10/13] perf tools: Make cs_etm__run_decoder() queue independent Mathieu Poirier
2019-02-12 17:16 ` Mathieu Poirier [this message]
2019-02-12 17:16 ` [PATCH 12/13] perf tools: Modularize main packet processing loop Mathieu Poirier
2019-02-12 17:16 ` [PATCH 13/13] perf tools: Modularize auxtrace_buffer fetch function Mathieu Poirier

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