linux-perf-users.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: James Clark <james.clark@arm.com>
To: acme@kernel.org, mathieu.poirier@linaro.org, coresight@lists.linaro.org
Cc: leo.yan@linaro.org, al.grant@arm.com, suzuki.poulose@arm.com,
	anshuman.khandual@arm.com, mike.leach@linaro.org,
	James Clark <james.clark@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/6] perf cs-etm: Only setup queues when they are modified
Date: Wed, 21 Jul 2021 16:01:59 +0100	[thread overview]
Message-ID: <20210721150202.32065-4-james.clark@arm.com> (raw)
In-Reply-To: <20210721150202.32065-1-james.clark@arm.com>

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.

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

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


  parent reply	other threads:[~2021-07-21 15:03 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-21 15:01 [PATCH v2 0/6] perf cs-etm: Support TRBE (unformatted decoding) James Clark
2021-07-21 15:01 ` [PATCH v2 1/6] perf cs-etm: Refactor initialisation of kernel start address James Clark
2021-07-21 15:01 ` [PATCH v2 2/6] perf cs-etm: Split setup and timestamp search functions James Clark
2021-07-21 15:01 ` James Clark [this message]
2021-07-21 15:02 ` [PATCH v2 4/6] perf cs-etm: Suppress printing when resetting decoder James Clark
2021-07-21 15:02 ` [PATCH v2 5/6] perf cs-etm: Use existing decoder instead of resetting it James Clark
2021-07-21 15:02 ` [PATCH v2 6/6] perf cs-etm: Pass unformatted flag to decoder James Clark
2021-07-21 16:05   ` Mathieu Poirier
2021-07-22 21:00     ` Arnaldo Carvalho de Melo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210721150202.32065-4-james.clark@arm.com \
    --to=james.clark@arm.com \
    --cc=acme@kernel.org \
    --cc=al.grant@arm.com \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=anshuman.khandual@arm.com \
    --cc=coresight@lists.linaro.org \
    --cc=john.garry@huawei.com \
    --cc=jolsa@redhat.com \
    --cc=leo.yan@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mathieu.poirier@linaro.org \
    --cc=mike.leach@linaro.org \
    --cc=namhyung@kernel.org \
    --cc=suzuki.poulose@arm.com \
    --cc=will@kernel.org \
    --subject='Re: [PATCH v2 3/6] perf cs-etm: Only setup queues when they are modified' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).