Date:	Fri, 21 Aug 2015 12:00:13 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH V8 10/25] perf tools: Add example call-graph script

Em Fri, Jul 17, 2015 at 07:33:45PM +0300, Adrian Hunter escreveu:
> Add a script to produce a call-graph from data exported
> to a postgresql database and derived from a processor trace
> event like intel_pt or intel_bts. Refer to comments in the
> scripts call-graph-from-postgresql.py and export-to-postgresql.py
> for more details.

Testing this, you forgot to add instructions to install the qt stuff:

  [acme@...icio ~]$ perf script -s
  ~/libexec/perf-core/scripts/python/export-to-postgresql.py bts_example
  branches calls

  Traceback (most recent call last):
    File
  "/home/acme/libexec/perf-core/scripts/python/export-to-postgresql.py",
  line 65, in <module>
      from PySide.QtSql import *
  ImportError: No module named PySide.QtSql
  Error running python script
  /home/acme/libexec/perf-core/scripts/python/export-to-postgresql.py
  [acme@...icio ~]$

I'll add it.

- Arnaldo
 
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
> ---
>  .../scripts/python/call-graph-from-postgresql.py   | 327 +++++++++++++++++++++
>  tools/perf/scripts/python/export-to-postgresql.py  |  47 +++
>  2 files changed, 374 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 000000000000..e78fdc2a5a9d
> --- /dev/null
> +++ b/tools/perf/scripts/python/call-graph-from-postgresql.py
> @@ -0,0 +1,327 @@
> +#!/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.
> +
> +# To use this script you will need to have exported data using the
> +# export-to-postgresql.py script.  Refer to that script for details.
> +#
> +# Following on from the example in the export-to-postgresql.py script, a
> +# call-graph can be displayed for the pt_example database like this:
> +#
> +#	python tools/perf/scripts/python/call-graph-from-postgresql.py pt_example
> +#
> +# Note this script supports connecting to remote databases by setting hostname,
> +# port, username, password, and dbname e.g.
> +#
> +#	python tools/perf/scripts/python/call-graph-from-postgresql.py "hostname=myhost username=myuser password=mypassword dbname=pt_example"
> +#
> +# The result is a GUI window with a tree representing a context-sensitive
> +# call-graph.  Expanding a couple of levels of the tree and adjusting column
> +# widths to suit will display something like:
> +#
> +#                                         Call Graph: pt_example
> +# Call Path                          Object      Count   Time(ns)  Time(%)  Branch Count   Branch Count(%)
> +# v- ls
> +#     v- 2638:2638
> +#         v- _start                  ld-2.19.so    1     10074071   100.0         211135            100.0
> +#           |- unknown               unknown       1        13198     0.1              1              0.0
> +#           >- _dl_start             ld-2.19.so    1      1400980    13.9          19637              9.3
> +#           >- _d_linit_internal     ld-2.19.so    1       448152     4.4          11094              5.3
> +#           v-__libc_start_main@plt  ls            1      8211741    81.5         180397             85.4
> +#              >- _dl_fixup          ld-2.19.so    1         7607     0.1            108              0.1
> +#              >- __cxa_atexit       libc-2.19.so  1        11737     0.1             10              0.0
> +#              >- __libc_csu_init    ls            1        10354     0.1             10              0.0
> +#              |- _setjmp            libc-2.19.so  1            0     0.0              4              0.0
> +#              v- main               ls            1      8182043    99.6         180254             99.9
> +#
> +# Points to note:
> +#	The top level is a command name (comm)
> +#	The next level is a thread (pid:tid)
> +#	Subsequent levels are functions
> +#	'Count' is the number of calls
> +#	'Time' is the elapsed time until the function returns
> +#	Percentages are relative to the level above
> +#	'Branch Count' is the total number of branches for that function and all
> +#       functions that it calls
> +
> +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)
> diff --git a/tools/perf/scripts/python/export-to-postgresql.py b/tools/perf/scripts/python/export-to-postgresql.py
> index 4cdafd880074..5e939eadacd2 100644
> --- a/tools/perf/scripts/python/export-to-postgresql.py
> +++ b/tools/perf/scripts/python/export-to-postgresql.py
> @@ -15,6 +15,53 @@ import sys
>  import struct
>  import datetime
>  
> +# To use this script you will need to have installed package python-pyside which
> +# provides LGPL-licensed Python bindings for Qt.  You will also need the package
> +# libqt4-sql-psql for Qt postgresql support.
> +#
> +# The script assumes postgresql is running on the local machine and that the
> +# user has postgresql permissions to create databases. Examples of installing
> +# postgresql and adding such a user are:
> +#
> +# fedora:
> +#
> +#	$ sudo yum install postgresql postgresql-server
> +#	$ sudo su - postgres -c initdb
> +#	$ sudo service postgresql start
> +#	$ sudo su - postgres
> +#	$ createuser <your user id here>
> +#	Shall the new role be a superuser? (y/n) y
> +#
> +# ubuntu:
> +#
> +#	$ sudo apt-get install postgresql
> +#	$ sudo su - postgres
> +#	$ createuser <your user id here>
> +#	Shall the new role be a superuser? (y/n) y
> +#
> +# An example of using this script with Intel PT:
> +#
> +#	$ perf record -e intel_pt//u ls
> +#	$ perf script -s ~/libexec/perf-core/scripts/python/export-to-postgresql.py pt_example branches calls
> +#	2015-05-29 12:49:23.464364 Creating database...
> +#	2015-05-29 12:49:26.281717 Writing to intermediate files...
> +#	2015-05-29 12:49:27.190383 Copying to database...
> +#	2015-05-29 12:49:28.140451 Removing intermediate files...
> +#	2015-05-29 12:49:28.147451 Adding primary keys
> +#	2015-05-29 12:49:28.655683 Adding foreign keys
> +#	2015-05-29 12:49:29.365350 Done
> +#
> +# To browse the database, psql can be used e.g.
> +#
> +#	$ psql pt_example
> +#	pt_example=# select * from samples_view where id < 100;
> +#	pt_example=# \d+
> +#	pt_example=# \d+ samples_view
> +#	pt_example=# \q
> +#
> +# An example of using the database is provided by the script
> +# call-graph-from-postgresql.py.  Refer to that script for details.
> +
>  from PySide.QtSql import *
>  
>  # Need to access PostgreSQL C library directly to use COPY FROM STDIN
> -- 
> 1.9.1
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