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#
# hackbench.py - class to manage an instance of hackbench load
#
# Copyright 2009 - 2012 Clark Williams <williams@redhat.com>
# Copyright 2009 - 2012 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 sys, os, time, glob, subprocess, errno
from signal import SIGTERM, SIGKILL
from rteval.modules.loads import CommandLineLoad
from rteval.Log import Log
class Hackbench(CommandLineLoad):
def __init__(self, config, logger):
CommandLineLoad.__init__(self, "hackbench", config, logger)
def _WorkloadSetup(self):
'calculate arguments based on input parameters'
(mem, units) = self.memsize
if units == 'KB':
mem = mem / (1024.0 * 1024.0)
elif units == 'MB':
mem = mem / 1024.0
elif units == 'TB':
mem = mem * 1024
ratio = float(mem) / float(self.num_cpus)
if ratio >= 0.75:
mult = float(self._cfg.setdefault('jobspercore', 2))
else:
self._log(Log.INFO, "hackbench: low memory system (%f GB/core)! Not running\n" % ratio)
mult = 0
self._donotrun = True
self.jobs = self.num_cpus * mult
self.args = ['hackbench', '-P',
'-g', str(self.jobs),
'-l', str(self._cfg.setdefault('loops', '100')),
'-s', str(self._cfg.setdefault('datasize', '100'))
]
self.__err_sleep = 5.0
def _WorkloadBuild(self):
# Nothing to build, so we're basically ready
self._setReady()
def _WorkloadPrepare(self):
self.__nullfp = os.open("/dev/null", os.O_RDWR)
if self._logging:
self.__out = self.open_logfile("hackbench.stdout")
self.__err = self.open_logfile("hackbench.stderr")
else:
self.__out = self.__err = self.__nullfp
self._log(Log.DEBUG, "starting loop (jobs: %d)" % self.jobs)
def _WorkloadTask(self):
if self.shouldStop():
return
self._log(Log.DEBUG, "running: %s" % " ".join(self.args))
try:
self.__hbproc = subprocess.Popen(self.args,
stdin=self.__nullfp,
stdout=self.__out,
stderr=self.__err)
except OSError, e:
if e.errno != errno.ENOMEM:
raise e
# Catch out-of-memory errors and wait a bit to (hopefully)
# ease memory pressure
self._log(Log.DEBUG, "hackbench: %s, sleeping for %f seconds" % (e.strerror, self.__err_sleep))
time.sleep(self.__err_sleep)
if self.__err_sleep < 60.0:
self.__err_sleep *= 2.0
if self.__err_sleep > 60.0:
self.__err_sleep = 60.0
def WorkloadAlive(self):
# As hackbench is short-lived, lets pretend it is always alive
return True
def _WorkloadCleanup(self):
if self._donotrun:
return
if self.__hbproc.poll() == None:
os.kill(self.__hbproc.pid, SIGKILL)
self.__hbproc.wait()
os.close(self.__nullfp)
if self._logging:
os.close(self.__out)
del self.__out
os.close(self.__err)
del self.__err
del self.__hbproc
del self.__nullfp
def ModuleParameters():
return {"jobspercore": {"descr": "Number of working threads per CPU core",
"default": 5,
"metavar": "NUM"}
}
def create(config, logger):
return Hackbench(config, logger)
if __name__ == '__main__':
h = Hackbench(params={'debugging':True, 'verbose':True})
h.run()
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