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From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH v29 2/5] trace-cmd: Add dummy function to initialize timestamp sync logic
Date: Fri, 19 Feb 2021 12:14:54 +0200
Message-ID: <20210219101457.2345089-3-tz.stoyanov@gmail.com> (raw)
In-Reply-To: <20210219101457.2345089-1-tz.stoyanov@gmail.com>

A dummy empty function is added, will be used to initialize timestamp
synchronization logic:
  tracecmd_tsync_init()
When this code is implemented as real plugins, this function will be
removed. Then the initializion will be triggered at plugin load time.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 lib/trace-cmd/trace-timesync.c |  8 ++++++++
 tracecmd/trace-agent.c         |  2 ++
 tracecmd/trace-record.c        | 23 +++++++++++++++--------
 3 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/lib/trace-cmd/trace-timesync.c b/lib/trace-cmd/trace-timesync.c
index 2581363f..8c1586c7 100644
--- a/lib/trace-cmd/trace-timesync.c
+++ b/lib/trace-cmd/trace-timesync.c
@@ -57,6 +57,14 @@ static struct tsync_proto *tsync_proto_find(const char *proto_name)
 	return NULL;
 }
 
+/**
+ * tracecmd_tsync_init - Initialize the global, per task, time sync data.
+ */
+void tracecmd_tsync_init(void)
+{
+
+}
+
 int tracecmd_tsync_proto_register(const char *proto_name, int accuracy, int roles,
 				  int supported_clocks, unsigned int flags,
 				  int (*init)(struct tracecmd_time_sync *),
diff --git a/tracecmd/trace-agent.c b/tracecmd/trace-agent.c
index ff4a4e11..36444d32 100644
--- a/tracecmd/trace-agent.c
+++ b/tracecmd/trace-agent.c
@@ -248,6 +248,8 @@ static void agent_serve(unsigned int port)
 	if (sd < 0)
 		die("Failed to open vsocket");
 
+	tracecmd_tsync_init();
+
 	if (!get_local_cid(&cid))
 		printf("listening on @%u:%u\n", cid, port);
 
diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index efd96d27..cc870124 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -6218,10 +6218,6 @@ static bool has_local_instances(void)
 	return false;
 }
 
-/*
- * This function contains common code for the following commands:
- * record, start, stream, profile.
- */
 static void record_trace(int argc, char **argv,
 			 struct common_record_context *ctx)
 {
@@ -6379,12 +6375,23 @@ static void record_trace(int argc, char **argv,
 	finalize_record_trace(ctx);
 }
 
+/*
+ * This function contains common code for the following commands:
+ * record, start, stream, profile.
+ */
+static void record_trace_command(int argc, char **argv,
+				 struct common_record_context *ctx)
+{
+	tracecmd_tsync_init();
+	record_trace(argc, argv, ctx);
+}
+
 void trace_start(int argc, char **argv)
 {
 	struct common_record_context ctx;
 
 	parse_record_options(argc, argv, CMD_start, &ctx);
-	record_trace(argc, argv, &ctx);
+	record_trace_command(argc, argv, &ctx);
 	exit(0);
 }
 
@@ -6476,7 +6483,7 @@ void trace_stream(int argc, char **argv)
 	struct common_record_context ctx;
 
 	parse_record_options(argc, argv, CMD_stream, &ctx);
-	record_trace(argc, argv, &ctx);
+	record_trace_command(argc, argv, &ctx);
 	exit(0);
 }
 
@@ -6495,7 +6502,7 @@ void trace_profile(int argc, char **argv)
 	if (!buffer_instances)
 		top_instance.flags |= BUFFER_FL_PROFILE;
 
-	record_trace(argc, argv, &ctx);
+	record_trace_command(argc, argv, &ctx);
 	do_trace_profile();
 	exit(0);
 }
@@ -6505,7 +6512,7 @@ void trace_record(int argc, char **argv)
 	struct common_record_context ctx;
 
 	parse_record_options(argc, argv, CMD_record, &ctx);
-	record_trace(argc, argv, &ctx);
+	record_trace_command(argc, argv, &ctx);
 	exit(0);
 }
 
-- 
2.29.2


  parent reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-19 10:14 [PATCH v29 0/5] Timestamp synchronization of host - guest tracing session Tzvetomir Stoyanov (VMware)
2021-02-19 10:14 ` [PATCH v29 1/5] trace-cmd: Add timestamp synchronization per vCPU Tzvetomir Stoyanov (VMware)
2021-02-19 10:14 ` Tzvetomir Stoyanov (VMware) [this message]
2021-02-19 10:14 ` [PATCH v29 3/5] trace-cmd: [POC] PTP-like algorithm for host - guest timestamp synchronization Tzvetomir Stoyanov (VMware)
2021-02-19 10:14 ` [PATCH v29 4/5] trace-cmd: Debug scripts for " Tzvetomir Stoyanov (VMware)
2021-02-19 10:14 ` [PATCH v29 5/5] trace-cmd [POC]: Add KVM timestamp synchronization plugin Tzvetomir Stoyanov (VMware)
2021-02-23 21:36   ` Steven Rostedt
2021-02-24  6:22     ` Tzvetomir Stoyanov
2021-02-24 23:19       ` Steven Rostedt

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