perf tools: Add example call-graph script
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 on how to set up the environment,
install the required packages, etc.
Committer note:
From the scripts, for convenience while reading 'git log':
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
$ python tools/perf/scripts/python/call-graph-from-postgresql.py 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
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-11-git-send-email-adrian.hunter@intel.com
[ Added 'python-pyside qt-postgresql' to the yum cmdline installing required packages ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
Arnaldo Carvalho de Melo
parent
60b88d8743
commit
4b715d24f4
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@ -0,0 +1,327 @@
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#!/usr/bin/python2
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# call-graph-from-postgresql.py: create call-graph from postgresql database
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# Copyright (c) 2014, Intel Corporation.
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms and conditions of the GNU General Public License,
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# version 2, as published by the Free Software Foundation.
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#
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# This program is distributed in the hope it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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# more details.
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# To use this script you will need to have exported data using the
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# export-to-postgresql.py script. Refer to that script for details.
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#
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# Following on from the example in the export-to-postgresql.py script, a
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# call-graph can be displayed for the pt_example database like this:
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#
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# python tools/perf/scripts/python/call-graph-from-postgresql.py pt_example
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#
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# Note this script supports connecting to remote databases by setting hostname,
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# port, username, password, and dbname e.g.
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#
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# python tools/perf/scripts/python/call-graph-from-postgresql.py "hostname=myhost username=myuser password=mypassword dbname=pt_example"
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#
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# The result is a GUI window with a tree representing a context-sensitive
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# call-graph. Expanding a couple of levels of the tree and adjusting column
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# widths to suit will display something like:
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#
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# Call Graph: pt_example
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# Call Path Object Count Time(ns) Time(%) Branch Count Branch Count(%)
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# v- ls
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# v- 2638:2638
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# v- _start ld-2.19.so 1 10074071 100.0 211135 100.0
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# |- unknown unknown 1 13198 0.1 1 0.0
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# >- _dl_start ld-2.19.so 1 1400980 13.9 19637 9.3
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# >- _d_linit_internal ld-2.19.so 1 448152 4.4 11094 5.3
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# v-__libc_start_main@plt ls 1 8211741 81.5 180397 85.4
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# >- _dl_fixup ld-2.19.so 1 7607 0.1 108 0.1
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# >- __cxa_atexit libc-2.19.so 1 11737 0.1 10 0.0
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# >- __libc_csu_init ls 1 10354 0.1 10 0.0
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# |- _setjmp libc-2.19.so 1 0 0.0 4 0.0
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# v- main ls 1 8182043 99.6 180254 99.9
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#
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# Points to note:
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# The top level is a command name (comm)
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# The next level is a thread (pid:tid)
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# Subsequent levels are functions
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# 'Count' is the number of calls
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# 'Time' is the elapsed time until the function returns
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# Percentages are relative to the level above
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# 'Branch Count' is the total number of branches for that function and all
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# functions that it calls
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import sys
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from PySide.QtCore import *
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from PySide.QtGui import *
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from PySide.QtSql import *
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from decimal import *
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class TreeItem():
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def __init__(self, db, row, parent_item):
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self.db = db
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self.row = row
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self.parent_item = parent_item
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self.query_done = False;
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self.child_count = 0
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self.child_items = []
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self.data = ["", "", "", "", "", "", ""]
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self.comm_id = 0
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self.thread_id = 0
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self.call_path_id = 1
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self.branch_count = 0
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self.time = 0
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if not parent_item:
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self.setUpRoot()
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def setUpRoot(self):
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self.query_done = True
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query = QSqlQuery(self.db)
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ret = query.exec_('SELECT id, comm FROM comms')
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if not ret:
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raise Exception("Query failed: " + query.lastError().text())
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while query.next():
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if not query.value(0):
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continue
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child_item = TreeItem(self.db, self.child_count, self)
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self.child_items.append(child_item)
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self.child_count += 1
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child_item.setUpLevel1(query.value(0), query.value(1))
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def setUpLevel1(self, comm_id, comm):
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self.query_done = True;
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self.comm_id = comm_id
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self.data[0] = comm
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self.child_items = []
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self.child_count = 0
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query = QSqlQuery(self.db)
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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))
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if not ret:
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raise Exception("Query failed: " + query.lastError().text())
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while query.next():
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child_item = TreeItem(self.db, self.child_count, self)
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self.child_items.append(child_item)
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self.child_count += 1
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child_item.setUpLevel2(comm_id, query.value(0), query.value(1), query.value(2))
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def setUpLevel2(self, comm_id, thread_id, pid, tid):
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self.comm_id = comm_id
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self.thread_id = thread_id
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self.data[0] = str(pid) + ":" + str(tid)
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def getChildItem(self, row):
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return self.child_items[row]
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def getParentItem(self):
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return self.parent_item
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def getRow(self):
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return self.row
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def timePercent(self, b):
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if not self.time:
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return "0.0"
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x = (b * Decimal(100)) / self.time
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return str(x.quantize(Decimal('.1'), rounding=ROUND_HALF_UP))
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def branchPercent(self, b):
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if not self.branch_count:
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return "0.0"
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x = (b * Decimal(100)) / self.branch_count
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return str(x.quantize(Decimal('.1'), rounding=ROUND_HALF_UP))
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def addChild(self, call_path_id, name, dso, count, time, branch_count):
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child_item = TreeItem(self.db, self.child_count, self)
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child_item.comm_id = self.comm_id
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child_item.thread_id = self.thread_id
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child_item.call_path_id = call_path_id
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child_item.branch_count = branch_count
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child_item.time = time
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child_item.data[0] = name
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if dso == "[kernel.kallsyms]":
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dso = "[kernel]"
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child_item.data[1] = dso
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child_item.data[2] = str(count)
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child_item.data[3] = str(time)
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child_item.data[4] = self.timePercent(time)
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child_item.data[5] = str(branch_count)
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child_item.data[6] = self.branchPercent(branch_count)
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self.child_items.append(child_item)
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self.child_count += 1
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def selectCalls(self):
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self.query_done = True;
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query = QSqlQuery(self.db)
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ret = query.exec_('SELECT id, call_path_id, branch_count, call_time, return_time, '
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'( SELECT name FROM symbols WHERE id = ( SELECT symbol_id FROM call_paths WHERE id = call_path_id ) ), '
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'( 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 ) ) ), '
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'( SELECT ip FROM call_paths where id = call_path_id ) '
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'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) +
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'ORDER BY call_path_id')
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if not ret:
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raise Exception("Query failed: " + query.lastError().text())
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last_call_path_id = 0
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name = ""
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dso = ""
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count = 0
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branch_count = 0
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total_branch_count = 0
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time = 0
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total_time = 0
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while query.next():
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if query.value(1) == last_call_path_id:
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count += 1
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branch_count += query.value(2)
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time += query.value(4) - query.value(3)
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else:
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if count:
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self.addChild(last_call_path_id, name, dso, count, time, branch_count)
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last_call_path_id = query.value(1)
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name = query.value(5)
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dso = query.value(6)
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count = 1
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total_branch_count += branch_count
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total_time += time
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branch_count = query.value(2)
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time = query.value(4) - query.value(3)
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if count:
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self.addChild(last_call_path_id, name, dso, count, time, branch_count)
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total_branch_count += branch_count
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total_time += time
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# Top level does not have time or branch count, so fix that here
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if total_branch_count > self.branch_count:
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self.branch_count = total_branch_count
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if self.branch_count:
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for child_item in self.child_items:
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child_item.data[6] = self.branchPercent(child_item.branch_count)
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if total_time > self.time:
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self.time = total_time
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if self.time:
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for child_item in self.child_items:
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child_item.data[4] = self.timePercent(child_item.time)
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def childCount(self):
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if not self.query_done:
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self.selectCalls()
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return self.child_count
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def columnCount(self):
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return 7
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def columnHeader(self, column):
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headers = ["Call Path", "Object", "Count ", "Time (ns) ", "Time (%) ", "Branch Count ", "Branch Count (%) "]
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return headers[column]
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def getData(self, column):
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return self.data[column]
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class TreeModel(QAbstractItemModel):
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def __init__(self, db, parent=None):
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super(TreeModel, self).__init__(parent)
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self.db = db
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self.root = TreeItem(db, 0, None)
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def columnCount(self, parent):
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return self.root.columnCount()
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def rowCount(self, parent):
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if parent.isValid():
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parent_item = parent.internalPointer()
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else:
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parent_item = self.root
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return parent_item.childCount()
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def headerData(self, section, orientation, role):
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if role == Qt.TextAlignmentRole:
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if section > 1:
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return Qt.AlignRight
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if role != Qt.DisplayRole:
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return None
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if orientation != Qt.Horizontal:
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return None
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return self.root.columnHeader(section)
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def parent(self, child):
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child_item = child.internalPointer()
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if child_item is self.root:
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return QModelIndex()
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parent_item = child_item.getParentItem()
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return self.createIndex(parent_item.getRow(), 0, parent_item)
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def index(self, row, column, parent):
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if parent.isValid():
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parent_item = parent.internalPointer()
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else:
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parent_item = self.root
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child_item = parent_item.getChildItem(row)
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return self.createIndex(row, column, child_item)
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def data(self, index, role):
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if role == Qt.TextAlignmentRole:
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if index.column() > 1:
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return Qt.AlignRight
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if role != Qt.DisplayRole:
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return None
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index_item = index.internalPointer()
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return index_item.getData(index.column())
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class MainWindow(QMainWindow):
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def __init__(self, db, dbname, parent=None):
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super(MainWindow, self).__init__(parent)
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self.setObjectName("MainWindow")
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self.setWindowTitle("Call Graph: " + dbname)
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self.move(100, 100)
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self.resize(800, 600)
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style = self.style()
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icon = style.standardIcon(QStyle.SP_MessageBoxInformation)
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self.setWindowIcon(icon);
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self.model = TreeModel(db)
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self.view = QTreeView()
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self.view.setModel(self.model)
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self.setCentralWidget(self.view)
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if __name__ == '__main__':
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if (len(sys.argv) < 2):
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print >> sys.stderr, "Usage is: call-graph-from-postgresql.py <database name>"
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raise Exception("Too few arguments")
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dbname = sys.argv[1]
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db = QSqlDatabase.addDatabase('QPSQL')
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opts = dbname.split()
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for opt in opts:
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if '=' in opt:
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opt = opt.split('=')
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if opt[0] == 'hostname':
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db.setHostName(opt[1])
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elif opt[0] == 'port':
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db.setPort(int(opt[1]))
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elif opt[0] == 'username':
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db.setUserName(opt[1])
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elif opt[0] == 'password':
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db.setPassword(opt[1])
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elif opt[0] == 'dbname':
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dbname = opt[1]
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else:
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dbname = opt
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db.setDatabaseName(dbname)
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if not db.open():
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raise Exception("Failed to open database " + dbname + " error: " + db.lastError().text())
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app = QApplication(sys.argv)
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window = MainWindow(db, dbname)
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window.show()
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err = app.exec_()
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db.close()
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sys.exit(err)
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@ -15,6 +15,53 @@ import sys
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import struct
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import datetime
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# To use this script you will need to have installed package python-pyside which
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# provides LGPL-licensed Python bindings for Qt. You will also need the package
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# libqt4-sql-psql for Qt postgresql support.
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#
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# The script assumes postgresql is running on the local machine and that the
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# user has postgresql permissions to create databases. Examples of installing
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# postgresql and adding such a user are:
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#
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# fedora:
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#
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# $ sudo yum install postgresql postgresql-server python-pyside qt-postgresql
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# $ sudo su - postgres -c initdb
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# $ sudo service postgresql start
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# $ sudo su - postgres
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# $ createuser <your user id here>
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# Shall the new role be a superuser? (y/n) y
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#
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# ubuntu:
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#
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# $ sudo apt-get install postgresql
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# $ sudo su - postgres
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# $ createuser <your user id here>
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# Shall the new role be a superuser? (y/n) y
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#
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# An example of using this script with Intel PT:
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#
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# $ perf record -e intel_pt//u ls
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# $ perf script -s ~/libexec/perf-core/scripts/python/export-to-postgresql.py pt_example branches calls
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# 2015-05-29 12:49:23.464364 Creating database...
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# 2015-05-29 12:49:26.281717 Writing to intermediate files...
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# 2015-05-29 12:49:27.190383 Copying to database...
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# 2015-05-29 12:49:28.140451 Removing intermediate files...
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# 2015-05-29 12:49:28.147451 Adding primary keys
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# 2015-05-29 12:49:28.655683 Adding foreign keys
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# 2015-05-29 12:49:29.365350 Done
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#
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# To browse the database, psql can be used e.g.
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#
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# $ psql pt_example
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# pt_example=# select * from samples_view where id < 100;
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# pt_example=# \d+
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# pt_example=# \d+ samples_view
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# pt_example=# \q
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#
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# An example of using the database is provided by the script
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# call-graph-from-postgresql.py. Refer to that script for details.
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from PySide.QtSql import *
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# Need to access PostgreSQL C library directly to use COPY FROM STDIN
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