perf scripts python: call-graph-from-sql.py: Refactor TreeItem class

class TreeItem represents items at all levels of the call-graph tree.
However, not all the levels represent the same data i.e. the top-level is
comms, the next level is threads, and subsequent levels are functions.
Consequently it is simpler to have separate classes for different levels
with commonality in a base class. Refactor TreeItem class accordingly.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20181001062853.28285-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 133 insertions, 140 deletions

diff --git a/tools/perf/scripts/python/call-graph-from-sql.py b/tools/perf/scripts/python/call-graph-from-sql.py
index 7f2eabe7dacd..ee1085169a3e 100644
--- a/tools/perf/scripts/python/call-graph-from-sql.py
+++ b/tools/perf/scripts/python/call-graph-from-sql.py
@@ -74,145 +74,6 @@ def QueryExec(query, stmt):
         if not ret:
                 raise Exception("Query failed: " + query.lastError().text())
 
-class TreeItem():
-
-        def __init__(self, db, row, parent_item):
-                self.db = db
-                self.row = row
-                self.parent_item = parent_item
-                self.query_done = False;
-                self.child_count = 0
-                self.child_items = []
-                self.data = ["", "", "", "", "", "", ""]
-                self.comm_id = 0
-                self.thread_id = 0
-                self.call_path_id = 1
-                self.branch_count = 0
-                self.time = 0
-                if not parent_item:
-                        self.setUpRoot()
-
-        def setUpRoot(self):
-                self.query_done = True
-                query = QSqlQuery(self.db)
-                QueryExec(query, 'SELECT id, comm FROM comms')
-                while query.next():
-                        if not query.value(0):
-                                continue
-                        child_item = TreeItem(self.db, self.child_count, self)
-                        self.child_items.append(child_item)
-                        self.child_count += 1
-                        child_item.setUpLevel1(query.value(0), query.value(1))
-
-        def setUpLevel1(self, comm_id, comm):
-                self.query_done = True;
-                self.comm_id = comm_id
-                self.data[0] = comm
-                self.child_items = []
-                self.child_count = 0
-                query = QSqlQuery(self.db)
-                QueryExec(query, 'SELECT thread_id, ( SELECT pid FROM threads WHERE id = thread_id ), ( SELECT tid FROM threads WHERE id = thread_id ) FROM comm_threads WHERE comm_id = ' + str(comm_id))
-                while query.next():
-                        child_item = TreeItem(self.db, self.child_count, self)
-                        self.child_items.append(child_item)
-                        self.child_count += 1
-                        child_item.setUpLevel2(comm_id, query.value(0), query.value(1), query.value(2))
-
-        def setUpLevel2(self, comm_id, thread_id, pid, tid):
-                self.comm_id = comm_id
-                self.thread_id = thread_id
-                self.data[0] = str(pid) + ":" + str(tid)
-
-        def getChildItem(self, row):
-                return self.child_items[row]
-
-        def getParentItem(self):
-                return self.parent_item
-
-        def getRow(self):
-                return self.row
-
-        def addChild(self, call_path_id, name, dso, count, time, branch_count):
-                child_item = TreeItem(self.db, self.child_count, self)
-                child_item.comm_id = self.comm_id
-                child_item.thread_id = self.thread_id
-                child_item.call_path_id = call_path_id
-                child_item.branch_count = branch_count
-                child_item.time = time
-                child_item.data[0] = name
-                child_item.data[1] = dsoname(dso)
-                child_item.data[2] = str(count)
-                child_item.data[3] = str(time)
-                child_item.data[4] = PercentToOneDP(time, self.time)
-                child_item.data[5] = str(branch_count)
-                child_item.data[6] = PercentToOneDP(branch_count, self.branch_count)
-                self.child_items.append(child_item)
-                self.child_count += 1
-
-        def selectCalls(self):
-                self.query_done = True;
-                query = QSqlQuery(self.db)
-                ret = query.exec_('SELECT id, call_path_id, branch_count, call_time, return_time, '
-                                  '( SELECT name FROM symbols WHERE id = ( SELECT symbol_id FROM call_paths WHERE id = call_path_id ) ), '
-                                  '( SELECT short_name FROM dsos WHERE id = ( SELECT dso_id FROM symbols WHERE id = ( SELECT symbol_id FROM call_paths WHERE id = call_path_id ) ) ), '
-                                  '( SELECT ip FROM call_paths where id = call_path_id ) '
-                                  'FROM calls WHERE parent_call_path_id = ' + str(self.call_path_id) + ' AND comm_id = ' + str(self.comm_id) + ' AND thread_id = ' + str(self.thread_id) +
-                                  ' ORDER BY call_path_id')
-                if not ret:
-                        raise Exception("Query failed: " + query.lastError().text())
-                last_call_path_id = 0
-                name = ""
-                dso = ""
-                count = 0
-                branch_count = 0
-                total_branch_count = 0
-                time = 0
-                total_time = 0
-                while query.next():
-                        if query.value(1) == last_call_path_id:
-                                count += 1
-                                branch_count += query.value(2)
-                                time += query.value(4) - query.value(3)
-                        else:
-                                if count:
-                                        self.addChild(last_call_path_id, name, dso, count, time, branch_count)
-                                last_call_path_id = query.value(1)
-                                name = query.value(5)
-                                dso = query.value(6)
-                                count = 1
-                                total_branch_count += branch_count
-                                total_time += time
-                                branch_count = query.value(2)
-                                time = query.value(4) - query.value(3)
-                if count:
-                        self.addChild(last_call_path_id, name, dso, count, time, branch_count)
-                total_branch_count += branch_count
-                total_time += time
-                # Top level does not have time or branch count, so fix that here
-                if total_branch_count > self.branch_count:
-                        self.branch_count = total_branch_count
-                        if self.branch_count:
-                                for child_item in self.child_items:
-                                        child_item.data[6] = PercentToOneDP(child_item.branch_count, self.branch_count)
-                if total_time > self.time:
-                        self.time = total_time
-                        if self.time:
-                                for child_item in self.child_items:
-                                        child_item.data[4] = PercentToOneDP(child_item.time, self.time)
-
-        def childCount(self):
-                if not self.query_done:
-                        self.selectCalls()
-                return self.child_count
-
-        def hasChildren(self):
-                if not self.query_done:
-                        return True
-                return self.child_count > 0
-
-        def getData(self, column):
-                return self.data[column]
-
 # Tree data model
 
 class TreeModel(QAbstractItemModel):
@@ -277,12 +138,144 @@ class TreeModel(QAbstractItemModel):
                 item = index.internalPointer()
                 return self.DisplayData(item, index)
 
+# Context-sensitive call graph data model item base
+
+class CallGraphLevelItemBase(object):
+
+        def __init__(self, glb, row, parent_item):
+                self.glb = glb
+                self.row = row
+                self.parent_item = parent_item
+                self.query_done = False;
+                self.child_count = 0
+                self.child_items = []
+
+        def getChildItem(self, row):
+                return self.child_items[row]
+
+        def getParentItem(self):
+                return self.parent_item
+
+        def getRow(self):
+                return self.row
+
+        def childCount(self):
+                if not self.query_done:
+                        self.Select()
+                        if not self.child_count:
+                                return -1
+                return self.child_count
+
+        def hasChildren(self):
+                if not self.query_done:
+                        return True
+                return self.child_count > 0
+
+        def getData(self, column):
+                return self.data[column]
+
+# Context-sensitive call graph data model level 2+ item base
+
+class CallGraphLevelTwoPlusItemBase(CallGraphLevelItemBase):
+
+        def __init__(self, glb, row, comm_id, thread_id, call_path_id, time, branch_count, parent_item):
+                super(CallGraphLevelTwoPlusItemBase, self).__init__(glb, row, parent_item)
+                self.comm_id = comm_id
+                self.thread_id = thread_id
+                self.call_path_id = call_path_id
+                self.branch_count = branch_count
+                self.time = time
+
+        def Select(self):
+                self.query_done = True;
+                query = QSqlQuery(self.glb.db)
+                QueryExec(query, "SELECT call_path_id, name, short_name, COUNT(calls.id), SUM(return_time - call_time), SUM(branch_count)"
+                                        " FROM calls"
+                                        " INNER JOIN call_paths ON calls.call_path_id = call_paths.id"
+                                        " INNER JOIN symbols ON call_paths.symbol_id = symbols.id"
+                                        " INNER JOIN dsos ON symbols.dso_id = dsos.id"
+                                        " WHERE parent_call_path_id = " + str(self.call_path_id) +
+                                        " AND comm_id = " + str(self.comm_id) +
+                                        " AND thread_id = " + str(self.thread_id) +
+                                        " GROUP BY call_path_id, name, short_name"
+                                        " ORDER BY call_path_id")
+                while query.next():
+                        child_item = CallGraphLevelThreeItem(self.glb, self.child_count, self.comm_id, self.thread_id, query.value(0), query.value(1), query.value(2), query.value(3), int(query.value(4)), int(query.value(5)), self)
+                        self.child_items.append(child_item)
+                        self.child_count += 1
+
+# Context-sensitive call graph data model level three item
+
+class CallGraphLevelThreeItem(CallGraphLevelTwoPlusItemBase):
+
+        def __init__(self, glb, row, comm_id, thread_id, call_path_id, name, dso, count, time, branch_count, parent_item):
+                super(CallGraphLevelThreeItem, self).__init__(glb, row, comm_id, thread_id, call_path_id, time, branch_count, parent_item)
+                dso = dsoname(dso)
+                self.data = [ name, dso, str(count), str(time), PercentToOneDP(time, parent_item.time), str(branch_count), PercentToOneDP(branch_count, parent_item.branch_count) ]
+                self.dbid = call_path_id
+
+# Context-sensitive call graph data model level two item
+
+class CallGraphLevelTwoItem(CallGraphLevelTwoPlusItemBase):
+
+        def __init__(self, glb, row, comm_id, thread_id, pid, tid, parent_item):
+                super(CallGraphLevelTwoItem, self).__init__(glb, row, comm_id, thread_id, 1, 0, 0, parent_item)
+                self.data = [str(pid) + ":" + str(tid), "", "", "", "", "", ""]
+                self.dbid = thread_id
+
+        def Select(self):
+                super(CallGraphLevelTwoItem, self).Select()
+                for child_item in self.child_items:
+                        self.time += child_item.time
+                        self.branch_count += child_item.branch_count
+                for child_item in self.child_items:
+                        child_item.data[4] = PercentToOneDP(child_item.time, self.time)
+                        child_item.data[6] = PercentToOneDP(child_item.branch_count, self.branch_count)
+
+# Context-sensitive call graph data model level one item
+
+class CallGraphLevelOneItem(CallGraphLevelItemBase):
+
+        def __init__(self, glb, row, comm_id, comm, parent_item):
+                super(CallGraphLevelOneItem, self).__init__(glb, row, parent_item)
+                self.data = [comm, "", "", "", "", "", ""]
+                self.dbid = comm_id
+
+        def Select(self):
+                self.query_done = True;
+                query = QSqlQuery(self.glb.db)
+                QueryExec(query, "SELECT thread_id, pid, tid"
+                                        " FROM comm_threads"
+                                        " INNER JOIN threads ON thread_id = threads.id"
+                                        " WHERE comm_id = " + str(self.dbid))
+                while query.next():
+                        child_item = CallGraphLevelTwoItem(self.glb, self.child_count, self.dbid, query.value(0), query.value(1), query.value(2), self)
+                        self.child_items.append(child_item)
+                        self.child_count += 1
+
+# Context-sensitive call graph data model root item
+
+class CallGraphRootItem(CallGraphLevelItemBase):
+
+        def __init__(self, glb):
+                super(CallGraphRootItem, self).__init__(glb, 0, None)
+                self.dbid = 0
+                self.query_done = True;
+                query = QSqlQuery(glb.db)
+                QueryExec(query, "SELECT id, comm FROM comms")
+                while query.next():
+                        if not query.value(0):
+                                continue
+                        child_item = CallGraphLevelOneItem(glb, self.child_count, query.value(0), query.value(1), self)
+                        self.child_items.append(child_item)
+                        self.child_count += 1
+
 # Context-sensitive call graph data model
 
 class CallGraphModel(TreeModel):
 
         def __init__(self, glb, parent=None):
-                super(CallGraphModel, self).__init__(TreeItem(glb.db, 0, None), parent)
+                super(CallGraphModel, self).__init__(CallGraphRootItem(glb), parent)
                 self.glb = glb
 
         def columnCount(self, parent=None):