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#
# HWLatDetect.py - Runs hwlatdetect and prepares the result for rteval
#
# Copyright 2012 - 2013 David Sommerseth <davids@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that 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.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# For the avoidance of doubt the "preferred form" of this code is one which
# is in an open unpatent encumbered format. Where cryptographic key signing
# forms part of the process of creating an executable the information
# including keys needed to generate an equivalently functional executable
# are deemed to be part of the source code.
#
import os, sys, libxml2
from rteval.modules import rtevalModulePrototype
from rteval.Log import Log
class HWLatDetectRunner(rtevalModulePrototype):
def __init__(self, config, logger=None):
rtevalModulePrototype.__init__(self, 'measurement', 'hwlatdetect', logger)
self.__cfg = config
self.__hwlat = None
self.__exceeding = None
self.__samples = []
def _WorkloadSetup(self):
try:
import hwlatdetect
self.__hwlat = hwlatdetect.Detector()
except Exception, e:
self._log(Log.WARN, "hwlatdetect could not be loaded. Will not run hwlatdetect")
self._log(Log.DEBUG, str(e))
def _WorkloadBuild(self):
self._setReady()
def _WorkloadPrepare(self):
self.__running = False
if self.__hwlat is None:
return
self._log(Log.DEBUG, "Preparing hwlatdetect")
self.__hwlat.set('threshold', int(self.__cfg.setdefault('threshold', 15)))
self.__hwlat.set('window', int(self.__cfg.setdefault('window', 1000000)))
self.__hwlat.set('width', int(self.__cfg.setdefault('width', 800000)))
self.__hwlat.testduration = int(self.__cfg.setdefault('duration', 10))
self.__hwlat.setup()
self._log(Log.DEBUG, "HWLatDetect settings: \n"
+ "\t threshold: %i\n" % (self.__cfg.threshold)
+ "\t window: %i\n" % (self.__cfg.window)
+ "\t width: %i\n" % (self.__cfg.width)
+ "\t duration: %i" % (self.__cfg.duration))
def _WorkloadTask(self):
if self.__hwlat is None:
return
if self.__running:
return
self.__running = True
self.__hwlat.detect()
def WorkloadAlive(self):
return self.__running
def _WorkloadCleanup(self):
if not self.__hwlat or not self.__running:
self._setFinished()
return
self._log(Log.DEBUG, "Parsing results")
# Grab the measurement results
self.__exceeding = self.__hwlat.get("count")
for s in self.__hwlat.samples:
self.__samples.append(s.split('\t'))
self.__running = False
self._setFinished()
def MakeReport(self):
rep_n = libxml2.newNode('hwlatdetect')
rep_n.newProp('format', '1.0')
if self.__hwlat is None:
rep_n.newProp('aborted', '1')
return rep_n
runp_n = rep_n.newChild(None, 'RunParams', None)
runp_n.newProp('threshold', str(self.__hwlat.get('threshold')))
runp_n.newProp('window', str(self.__hwlat.get('window')))
runp_n.newProp('width', str(self.__hwlat.get('width')))
runp_n.newProp('duration', str(self.__hwlat.testduration))
sn = rep_n.newChild(None, 'samples', None)
sn.newProp('exceeding', str(self.__exceeding))
sn.newProp('count', str(len(self.__samples)))
for s in self.__samples:
n = sn.newChild(None, 'sample', None)
n.newProp('timestamp', s[0])
n.newProp('duration', s[1])
return rep_n
def ModuleInfo():
return {"parallel": False,
"loads": False}
def ModuleParameters():
return {"threshold": {"descr": "Specify the TSC gap in microseconds used to detect an SMI",
"default": 15,
"metavar": "MICROSEC"},
"window": {"descr": "Sample window size (in microseconds)",
"default": 1000000,
"metavar": "MICROSEC"},
"width": {"descr": "Sampling width inside the sampling window (in microseconds)",
"default": 800000,
"metavar": "MICROSEC"},
"duration": {"descr": "How long in seconds to run hwlatdetect",
"default": 15,
"metavar": "SEC"}
}
def create(params, logger):
return HWLatDetectRunner(params, logger)
if __name__ == '__main__':
from rtevalConfig import rtevalConfig
l = Log()
l.SetLogVerbosity(Log.INFO|Log.DEBUG|Log.ERR|Log.WARN)
cfg = rtevalConfig({}, logger=l)
c = HWLatDetectRunner(cfg, l)
c._WorkloadSetup()
c._WorkloadPrepare()
c._WorkloadTask()
c._WorkloadCleanup()
rep_n = c.MakeReport()
xml = libxml2.newDoc('1.0')
xml.setRootElement(rep_n)
xml.saveFormatFileEnc('-','UTF-8',1)
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