Ви не можете вибрати більше 25 тем
Теми мають розпочинатися з літери або цифри, можуть містити дефіси (-) і не повинні перевищувати 35 символів.
155 рядки
5.6 KiB
155 рядки
5.6 KiB
#! /usr/bin/env python
|
|
|
|
import sys
|
|
from optparse import OptionParser
|
|
import random
|
|
|
|
parser = OptionParser()
|
|
parser.add_option("-s", "--seed", default=0, help="the random seed",
|
|
action="store", type="int", dest="seed")
|
|
parser.add_option("-j", "--jobs", default=3, help="number of jobs in the system",
|
|
action="store", type="int", dest="jobs")
|
|
parser.add_option("-l", "--jlist", default="", help="instead of random jobs, provide a comma-separated list of run times",
|
|
action="store", type="string", dest="jlist")
|
|
parser.add_option("-m", "--maxlen", default=10, help="max length of job",
|
|
action="store", type="int", dest="maxlen")
|
|
parser.add_option("-p", "--policy", default="FIFO", help="sched policy to use: SJF, FIFO, RR",
|
|
action="store", type="string", dest="policy")
|
|
parser.add_option("-q", "--quantum", help="length of time slice for RR policy", default=1,
|
|
action="store", type="int", dest="quantum")
|
|
parser.add_option("-c", help="compute answers for me", action="store_true", default=False, dest="solve")
|
|
|
|
(options, args) = parser.parse_args()
|
|
|
|
random.seed(options.seed)
|
|
|
|
print 'ARG policy', options.policy
|
|
if options.jlist == '':
|
|
print 'ARG jobs', options.jobs
|
|
print 'ARG maxlen', options.maxlen
|
|
print 'ARG seed', options.seed
|
|
else:
|
|
print 'ARG jlist', options.jlist
|
|
|
|
print ''
|
|
|
|
print 'Here is the job list, with the run time of each job: '
|
|
|
|
import operator
|
|
|
|
joblist = []
|
|
if options.jlist == '':
|
|
for jobnum in range(0,options.jobs):
|
|
runtime = int(options.maxlen * random.random()) + 1
|
|
joblist.append([jobnum, runtime])
|
|
print ' Job', jobnum, '( length = ' + str(runtime) + ' )'
|
|
else:
|
|
jobnum = 0
|
|
for runtime in options.jlist.split(','):
|
|
joblist.append([jobnum, float(runtime)])
|
|
jobnum += 1
|
|
for job in joblist:
|
|
print ' Job', job[0], '( length = ' + str(job[1]) + ' )'
|
|
print '\n'
|
|
|
|
if options.solve == True:
|
|
print '** Solutions **\n'
|
|
if options.policy == 'SJF':
|
|
joblist = sorted(joblist, key=operator.itemgetter(1))
|
|
options.policy = 'FIFO'
|
|
|
|
if options.policy == 'FIFO':
|
|
thetime = 0
|
|
print 'Execution trace:'
|
|
for job in joblist:
|
|
print ' [ time %3d ] Run job %d for %.2f secs ( DONE at %.2f )' % (thetime, job[0], job[1], thetime + job[1])
|
|
thetime += job[1]
|
|
|
|
print '\nFinal statistics:'
|
|
t = 0.0
|
|
count = 0
|
|
turnaroundSum = 0.0
|
|
waitSum = 0.0
|
|
responseSum = 0.0
|
|
for tmp in joblist:
|
|
jobnum = tmp[0]
|
|
runtime = tmp[1]
|
|
|
|
response = t
|
|
turnaround = t + runtime
|
|
wait = t
|
|
print ' Job %3d -- Response: %3.2f Turnaround %3.2f Wait %3.2f' % (jobnum, response, turnaround, wait)
|
|
responseSum += response
|
|
turnaroundSum += turnaround
|
|
waitSum += wait
|
|
t += runtime
|
|
count = count + 1
|
|
print '\n Average -- Response: %3.2f Turnaround %3.2f Wait %3.2f\n' % (responseSum/count, turnaroundSum/count, waitSum/count)
|
|
|
|
if options.policy == 'RR':
|
|
print 'Execution trace:'
|
|
turnaround = {}
|
|
response = {}
|
|
lastran = {}
|
|
wait = {}
|
|
quantum = float(options.quantum)
|
|
jobcount = len(joblist)
|
|
for i in range(0,jobcount):
|
|
lastran[i] = 0.0
|
|
wait[i] = 0.0
|
|
turnaround[i] = 0.0
|
|
response[i] = -1
|
|
|
|
runlist = []
|
|
for e in joblist:
|
|
runlist.append(e)
|
|
|
|
thetime = 0.0
|
|
while jobcount > 0:
|
|
# print '%d jobs remaining' % jobcount
|
|
job = runlist.pop(0)
|
|
jobnum = job[0]
|
|
runtime = float(job[1])
|
|
if response[jobnum] == -1:
|
|
response[jobnum] = thetime
|
|
currwait = thetime - lastran[jobnum]
|
|
wait[jobnum] += currwait
|
|
if runtime > quantum:
|
|
runtime -= quantum
|
|
ranfor = quantum
|
|
print ' [ time %3d ] Run job %3d for %.2f secs' % (thetime, jobnum, ranfor)
|
|
runlist.append([jobnum, runtime])
|
|
else:
|
|
ranfor = runtime;
|
|
print ' [ time %3d ] Run job %3d for %.2f secs ( DONE at %.2f )' % (thetime, jobnum, ranfor, thetime + ranfor)
|
|
turnaround[jobnum] = thetime + ranfor
|
|
jobcount -= 1
|
|
thetime += ranfor
|
|
lastran[jobnum] = thetime
|
|
|
|
print '\nFinal statistics:'
|
|
turnaroundSum = 0.0
|
|
waitSum = 0.0
|
|
responseSum = 0.0
|
|
for i in range(0,len(joblist)):
|
|
turnaroundSum += turnaround[i]
|
|
responseSum += response[i]
|
|
waitSum += wait[i]
|
|
print ' Job %3d -- Response: %3.2f Turnaround %3.2f Wait %3.2f' % (i, response[i], turnaround[i], wait[i])
|
|
count = len(joblist)
|
|
|
|
print '\n Average -- Response: %3.2f Turnaround %3.2f Wait %3.2f\n' % (responseSum/count, turnaroundSum/count, waitSum/count)
|
|
|
|
if options.policy != 'FIFO' and options.policy != 'SJF' and options.policy != 'RR':
|
|
print 'Error: Policy', options.policy, 'is not available.'
|
|
sys.exit(0)
|
|
else:
|
|
print 'Compute the turnaround time, response time, and wait time for each job.'
|
|
print 'When you are done, run this program again, with the same arguments,'
|
|
print 'but with -c, which will thus provide you with the answers. You can use'
|
|
print '-s <somenumber> or your own job list (-l 10,15,20 for example)'
|
|
print 'to generate different problems for yourself.'
|
|
print ''
|
|
|
|
|
|
|