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Subject[PATCH 44/44] perf tools: Add example call-graph script
Date
Add a python script which will display a context-sensitive
call-graph using data from a postrgreql database created
by the export-to-postgresql.py script.

Example:

# Record 'ls' command
~/libexec/perf-core/perf-with-kcore record pt_ls -e intel_pt// -- ls

# Create and export to database 'pt_ls'
~/libexec/perf-core/perf-with-kcore script pt_ls -s ~/libexec/perf-core/scripts/python/export-to-postgresql.py pt_ls branches calls

# Display call-graph from database 'pt_ls'
python tools/perf/scripts/python/call-graph-from-postgresql.py pt_ls

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
.../scripts/python/call-graph-from-postgresql.py | 285 +++++++++++++++++++++
1 file changed, 285 insertions(+)
create mode 100644 tools/perf/scripts/python/call-graph-from-postgresql.py

diff --git a/tools/perf/scripts/python/call-graph-from-postgresql.py b/tools/perf/scripts/python/call-graph-from-postgresql.py
new file mode 100644
index 0000000..5e8cfdf
--- /dev/null
+++ b/tools/perf/scripts/python/call-graph-from-postgresql.py
@@ -0,0 +1,285 @@
+#!/usr/bin/python2
+# call-graph-from-postgresql.py: create call-graph from postgresql database
+# Copyright (c) 2014, Intel Corporation.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms and conditions of the GNU General Public License,
+# version 2, as published by the Free Software Foundation.
+#
+# This program is distributed in the hope it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+# more details.
+
+import sys
+from PySide.QtCore import *
+from PySide.QtGui import *
+from PySide.QtSql import *
+from decimal import *
+
+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)
+ ret = query.exec_('SELECT id, comm FROM comms')
+ if not ret:
+ raise Exception("Query failed: " + query.lastError().text())
+ 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)
+ ret = query.exec_('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))
+ if not ret:
+ raise Exception("Query failed: " + query.lastError().text())
+ 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 timePercent(self, b):
+ if not self.time:
+ return "0.0"
+ x = (b * Decimal(100)) / self.time
+ return str(x.quantize(Decimal('.1'), rounding=ROUND_HALF_UP))
+
+ def branchPercent(self, b):
+ if not self.branch_count:
+ return "0.0"
+ x = (b * Decimal(100)) / self.branch_count
+ return str(x.quantize(Decimal('.1'), rounding=ROUND_HALF_UP))
+
+ 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
+ if dso == "[kernel.kallsyms]":
+ dso = "[kernel]"
+ child_item.data[1] = dso
+ child_item.data[2] = str(count)
+ child_item.data[3] = str(time)
+ child_item.data[4] = self.timePercent(time)
+ child_item.data[5] = str(branch_count)
+ child_item.data[6] = self.branchPercent(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] = self.branchPercent(child_item.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] = self.timePercent(child_item.time)
+
+ def childCount(self):
+ if not self.query_done:
+ self.selectCalls()
+ return self.child_count
+
+ def columnCount(self):
+ return 7
+
+ def columnHeader(self, column):
+ headers = ["Call Path", "Object", "Count ", "Time (ns) ", "Time (%) ", "Branch Count ", "Branch Count (%) "]
+ return headers[column]
+
+ def getData(self, column):
+ return self.data[column]
+
+class TreeModel(QAbstractItemModel):
+
+ def __init__(self, db, parent=None):
+ super(TreeModel, self).__init__(parent)
+ self.db = db
+ self.root = TreeItem(db, 0, None)
+
+ def columnCount(self, parent):
+ return self.root.columnCount()
+
+ def rowCount(self, parent):
+ if parent.isValid():
+ parent_item = parent.internalPointer()
+ else:
+ parent_item = self.root
+ return parent_item.childCount()
+
+ def headerData(self, section, orientation, role):
+ if role == Qt.TextAlignmentRole:
+ if section > 1:
+ return Qt.AlignRight
+ if role != Qt.DisplayRole:
+ return None
+ if orientation != Qt.Horizontal:
+ return None
+ return self.root.columnHeader(section)
+
+ def parent(self, child):
+ child_item = child.internalPointer()
+ if child_item is self.root:
+ return QModelIndex()
+ parent_item = child_item.getParentItem()
+ return self.createIndex(parent_item.getRow(), 0, parent_item)
+
+ def index(self, row, column, parent):
+ if parent.isValid():
+ parent_item = parent.internalPointer()
+ else:
+ parent_item = self.root
+ child_item = parent_item.getChildItem(row)
+ return self.createIndex(row, column, child_item)
+
+ def data(self, index, role):
+ if role == Qt.TextAlignmentRole:
+ if index.column() > 1:
+ return Qt.AlignRight
+ if role != Qt.DisplayRole:
+ return None
+ index_item = index.internalPointer()
+ return index_item.getData(index.column())
+
+class MainWindow(QMainWindow):
+
+ def __init__(self, db, dbname, parent=None):
+ super(MainWindow, self).__init__(parent)
+
+ self.setObjectName("MainWindow")
+ self.setWindowTitle("Call Graph: " + dbname)
+ self.move(100, 100)
+ self.resize(800, 600)
+ style = self.style()
+ icon = style.standardIcon(QStyle.SP_MessageBoxInformation)
+ self.setWindowIcon(icon);
+
+ self.model = TreeModel(db)
+
+ self.view = QTreeView()
+ self.view.setModel(self.model)
+
+ self.setCentralWidget(self.view)
+
+if __name__ == '__main__':
+ if (len(sys.argv) < 2):
+ print >> sys.stderr, "Usage is: call-graph-from-postgresql.py <database name>"
+ raise Exception("Too few arguments")
+
+ dbname = sys.argv[1]
+
+ db = QSqlDatabase.addDatabase('QPSQL')
+
+ opts = dbname.split()
+ for opt in opts:
+ if '=' in opt:
+ opt = opt.split('=')
+ if opt[0] == 'hostname':
+ db.setHostName(opt[1])
+ elif opt[0] == 'port':
+ db.setPort(int(opt[1]))
+ elif opt[0] == 'username':
+ db.setUserName(opt[1])
+ elif opt[0] == 'password':
+ db.setPassword(opt[1])
+ elif opt[0] == 'dbname':
+ dbname = opt[1]
+ else:
+ dbname = opt
+
+ db.setDatabaseName(dbname)
+ if not db.open():
+ raise Exception("Failed to open database " + dbname + " error: " + db.lastError().text())
+
+ app = QApplication(sys.argv)
+ window = MainWindow(db, dbname)
+ window.show()
+ err = app.exec_()
+ db.close()
+ sys.exit(err)
--
1.9.1


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