perf scripts python: exported-sql-viewer.py: Add global time range calculations

Add calculations to determine a time range that encompasses all data.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20190821083216.1340-4-adrian.hunter@intel.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/scripts/python/exported-sql-viewer.py

@@ -2088,10 +2088,8 @@ class SampleTimeRangesDataItem(LineEditDataItem):
 		QueryExec(query, "SELECT id, time FROM samples ORDER BY id DESC LIMIT 1")
 		if query.next():
 			self.last_id = int(query.value(0))
-			self.last_time = int(query.value(1))
-		QueryExec(query, "SELECT time FROM samples WHERE time != 0 ORDER BY id LIMIT 1")
-		if query.next():
-			self.first_time = int(query.value(0))
+		self.first_time = int(glb.HostStartTime())
+		self.last_time = int(glb.HostFinishTime())
 		if placeholder_text:
 			placeholder_text += ", between " + str(self.first_time) + " and " + str(self.last_time)
 
@@ -3500,6 +3498,9 @@ class Glb():
 			self.have_disassembler = True
 		except:
 			self.have_disassembler = False
+		self.host_machine_id = 0
+		self.host_start_time = 0
+		self.host_finish_time = 0
 
 	def FileFromBuildId(self, build_id):
 		file_name = self.buildid_dir + build_id[0:2] + "/" + build_id[2:] + "/elf"
@@ -3532,6 +3533,110 @@ class Glb():
 			except:
 				pass
 
+	def GetHostMachineId(self):
+		query = QSqlQuery(self.db)
+		QueryExec(query, "SELECT id FROM machines WHERE pid = -1")
+		if query.next():
+			self.host_machine_id = query.value(0)
+		else:
+			self.host_machine_id = 0
+		return self.host_machine_id
+
+	def HostMachineId(self):
+		if self.host_machine_id:
+			return self.host_machine_id
+		return self.GetHostMachineId()
+
+	def SelectValue(self, sql):
+		query = QSqlQuery(self.db)
+		try:
+			QueryExec(query, sql)
+		except:
+			return None
+		if query.next():
+			return Decimal(query.value(0))
+		return None
+
+	def SwitchesMinTime(self, machine_id):
+		return self.SelectValue("SELECT time"
+					" FROM context_switches"
+					" WHERE time != 0 AND machine_id = " + str(machine_id) +
+					" ORDER BY id LIMIT 1")
+
+	def SwitchesMaxTime(self, machine_id):
+		return self.SelectValue("SELECT time"
+					" FROM context_switches"
+					" WHERE time != 0 AND machine_id = " + str(machine_id) +
+					" ORDER BY id DESC LIMIT 1")
+
+	def SamplesMinTime(self, machine_id):
+		return self.SelectValue("SELECT time"
+					" FROM samples"
+					" WHERE time != 0 AND machine_id = " + str(machine_id) +
+					" ORDER BY id LIMIT 1")
+
+	def SamplesMaxTime(self, machine_id):
+		return self.SelectValue("SELECT time"
+					" FROM samples"
+					" WHERE time != 0 AND machine_id = " + str(machine_id) +
+					" ORDER BY id DESC LIMIT 1")
+
+	def CallsMinTime(self, machine_id):
+		return self.SelectValue("SELECT calls.call_time"
+					" FROM calls"
+					" INNER JOIN threads ON threads.thread_id = calls.thread_id"
+					" WHERE calls.call_time != 0 AND threads.machine_id = " + str(machine_id) +
+					" ORDER BY calls.id LIMIT 1")
+
+	def CallsMaxTime(self, machine_id):
+		return self.SelectValue("SELECT calls.return_time"
+					" FROM calls"
+					" INNER JOIN threads ON threads.thread_id = calls.thread_id"
+					" WHERE calls.return_time != 0 AND threads.machine_id = " + str(machine_id) +
+					" ORDER BY calls.return_time DESC LIMIT 1")
+
+	def GetStartTime(self, machine_id):
+		t0 = self.SwitchesMinTime(machine_id)
+		t1 = self.SamplesMinTime(machine_id)
+		t2 = self.CallsMinTime(machine_id)
+		if t0 is None or (not(t1 is None) and t1 < t0):
+			t0 = t1
+		if t0 is None or (not(t2 is None) and t2 < t0):
+			t0 = t2
+		return t0
+
+	def GetFinishTime(self, machine_id):
+		t0 = self.SwitchesMaxTime(machine_id)
+		t1 = self.SamplesMaxTime(machine_id)
+		t2 = self.CallsMaxTime(machine_id)
+		if t0 is None or (not(t1 is None) and t1 > t0):
+			t0 = t1
+		if t0 is None or (not(t2 is None) and t2 > t0):
+			t0 = t2
+		return t0
+
+	def HostStartTime(self):
+		if self.host_start_time:
+			return self.host_start_time
+		self.host_start_time = self.GetStartTime(self.HostMachineId())
+		return self.host_start_time
+
+	def HostFinishTime(self):
+		if self.host_finish_time:
+			return self.host_finish_time
+		self.host_finish_time = self.GetFinishTime(self.HostMachineId())
+		return self.host_finish_time
+
+	def StartTime(self, machine_id):
+		if machine_id == self.HostMachineId():
+			return self.HostStartTime()
+		return self.GetStartTime(machine_id)
+
+	def FinishTime(self, machine_id):
+		if machine_id == self.HostMachineId():
+			return self.HostFinishTime()
+		return self.GetFinishTime(machine_id)
+
 # Database reference
 
 class DBRef():