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221 lines
7.1 KiB
Python
221 lines
7.1 KiB
Python
#!/usr/bin/env python
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#
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# ***** BEGIN LICENSE BLOCK *****
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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
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#
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# The contents of this file are subject to the Mozilla Public License Version
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# 1.1 (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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# http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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# for the specific language governing rights and limitations under the
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# License.
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#
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# The Original Code is standalone Firefox Windows performance test.
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#
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# The Initial Developer of the Original Code is Google Inc.
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# Portions created by the Initial Developer are Copyright (C) 2006
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# Annie Sullivan <annie.sullivan@gmail.com> (original author)
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# Ben Hearsum <bhearsum@wittydomain.com> (ported to linux)
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#
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# Alternatively, the contents of this file may be used under the terms of
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# either the GNU General Public License Version 2 or later (the "GPL"), or
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# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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# in which case the provisions of the GPL or the LGPL are applicable instead
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# of those above. If you wish to allow use of your version of this file only
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# under the terms of either the GPL or the LGPL, and not to allow others to
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# use your version of this file under the terms of the MPL, indicate your
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# decision by deleting the provisions above and replace them with the notice
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# and other provisions required by the GPL or the LGPL. If you do not delete
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# the provisions above, a recipient may use your version of this file under
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# the terms of any one of the MPL, the GPL or the LGPL.
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#
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# ***** END LICENSE BLOCK *****
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"""A set of functions to run the Tp test.
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The Tp test measures page load times in Firefox. It does this with a
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JavaScript script that opens a new window and cycles through page loads
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from the local disk, timing each one. The script dumps the sum of the
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mean times to open each page, and the standard deviation, to standard out.
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We can also measure performance attributes during the test. See below for
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what can be monitored
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"""
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__author__ = 'annie.sullivan@gmail.com (Annie Sullivan)'
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import os
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import time
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import threading
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import ffprocess
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def GetPrivateBytes(pid):
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"""Calculate the amount of private, writeable memory allocated to a process.
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This code was adapted from 'pmap.c', part of the procps project.
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"""
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mapfile = '/proc/%s/maps' % pid
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maps = open(mapfile)
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private = 0
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for line in maps:
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# split up
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(range,line) = line.split(" ", 1)
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(start,end) = range.split("-")
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flags = line.split(" ", 1)[0]
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size = int(end, 16) - int(start, 16)
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if flags.find("p") >= 0:
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if flags.find("w") >= 0:
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private += size
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return private
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def GetResidentSize(pid):
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"""Retrieve the current resident memory for a given process"""
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# for some reason /proc/PID/stat doesn't give accurate information
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# so we use status instead
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file = '/proc/%s/status' % pid
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status = open(file)
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for line in status:
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if line.find("VmRSS") >= 0:
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return int(line.split()[1]) * 1024
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def GetCpuTime(pid, sampleTime=1):
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# return all zeros on this platform as per the 7/18/07 perf meeting
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return 0
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counterDict = {}
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counterDict["Private Bytes"] = GetPrivateBytes
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counterDict["RSS"] = GetResidentSize
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counterDict["% Processor Time"] = GetCpuTime
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class CounterManager(threading.Thread):
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"""This class manages the monitoring of a process with any number of
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counters.
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A counter can be any function that takes an argument of one pid and
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returns a piece of data about that process.
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Some examples are: CalcCPUTime, GetResidentSize, and GetPrivateBytes
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"""
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pollInterval = .25
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def __init__(self, process, counters=None):
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"""Args:
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counters: A list of counters to monitor. Any counters whose name does
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not match a key in 'counterDict' will be ignored.
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"""
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self.allCounters = {}
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self.registeredCounters = {}
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self.process = process
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self.runThread = False
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self.pid = -1
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self._loadCounters()
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self.registerCounters(counters)
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threading.Thread.__init__(self)
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def _loadCounters(self):
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"""Loads all of the counters defined in the counterDict"""
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for counter in counterDict.keys():
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self.allCounters[counter] = counterDict[counter]
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def registerCounters(self, counters):
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"""Registers a list of counters that will be monitoring.
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Only counters whose names are found in allCounters will be added
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"""
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for counter in counters:
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if counter in self.allCounters:
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self.registeredCounters[counter] = \
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[self.allCounters[counter], []]
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def unregisterCounters(self, counters):
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"""Unregister a list of counters.
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Only counters whose names are found in registeredCounters will be
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paid attention to
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"""
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for counter in counters:
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if counter in self.registeredCounters:
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del self.registeredCounters[counter]
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def getRegisteredCounters(self):
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"""Returns a list of the registered counters."""
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return keys(self.registeredCounters)
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def getCounterValue(self, counterName):
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"""Returns the last value of the counter 'counterName'"""
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try:
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if counterName is "% Processor Time":
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return self._getCounterAverage(counterName)
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else:
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return self.registeredCounters[counterName][1][-1]
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except:
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return None
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def _getCounterAverage(self, counterName):
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"""Returns the average value of the counter 'counterName'"""
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try:
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total = 0
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for v in self.registeredCounters[counterName][1]:
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total += v
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return total / len(self.registeredCounters[counterName][1])
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except:
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return None
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def getProcess(self):
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"""Returns the process currently associated with this CounterManager"""
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return self.process
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def startMonitor(self):
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"""Starts the monitoring process.
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Throws an exception if any error occurs
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"""
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# TODO: make this function less ugly
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try:
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# the last process is the useful one
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self.pid = ffprocess.GetPidsByName(self.process)[-1]
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os.stat('/proc/%s' % self.pid)
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self.runThread = True
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self.start()
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except:
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print 'WARNING: problem starting counter monitor'
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def stopMonitor(self):
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"""Stops the monitor"""
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# TODO: should probably wait until we know run() is completely stopped
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# before setting self.pid to None. Use a lock?
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self.runThread = False
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def run(self):
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"""Performs the actual monitoring of the process. Will keep running
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until stopMonitor() is called
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"""
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while self.runThread:
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for counter in self.registeredCounters.keys():
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# counter[0] is a function that gets the current value for
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# a counter
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# counter[1] is a list of recorded values
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try:
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self.registeredCounters[counter][1].append(
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self.registeredCounters[counter][0](self.pid))
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except:
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# if a counter throws an exception, remove it
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self.unregisterCounters([counter])
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time.sleep(self.pollInterval)
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