sys.exit(1)
# PDQ modeling code starts here ...
jNet = JackNet("SimPy Jackson Network", 1) # create an instance
pdq.Init(jNet.name)
pdq.SetWUnit("Msgs")
pdq.SetTUnit("Time")
# Create PDQ context and workload for the network
streams = pdq.CreateOpen(jNet.work, jNet.arrivRate)
# Create PDQ queues
for i in range(len(jNet.router)):
nodes = pdq.CreateNode(jNet.router[i], pdq.CEN, pdq.FCFS)
pdq.SetVisits(jNet.router[i], jNet.work, jNet.visitRatio[i], \
jNet.servTime[i])
# Solve the model and report the peformance measures
pdq.Solve(pdq.CANON)
pdq.Report()
# generic PDQ format
# Collect particular PDQ statistics
print "---------- Selected PDQ Metrics for SimPy Comparison ---------"
for i in range(len(jNet.router)):
msgs = pdq.GetQueueLength(jNet.router[i], jNet.work, pdq.TRANS)
print "Mean queue%d: %7.4f (%s)" % (i + 1, msgs, "Not in SimPy report")
jNet.totalMsgs += msgs
print "Mean number: %7.4f" % jNet.totalMsgs
print "Mean delay: %7.4f %11s" % (pdq.GetResponse(pdq.TRANS, jNet.work), \
"(Little's law Q = X R holds!)")
# Based on open_feedback
rx_prob = 0.30
inter_arriv_rate = 0.5
service_time = 0.75
mean_visits = 1.0 / (1.0 - rx_prob)
#----- Initialize the model ------------------------------------------
pdq.Init("Open Feedback")
#---- Define the queueing center -------------------------------------
pdq.nodes = pdq.CreateNode("channel", pdq.CEN, pdq.FCFS)
#---- Define the workload and circuit type ---------------------------
pdq.streams = pdq.CreateOpen("message", inter_arriv_rate)
#---- Define service demand due to workload on the queueing center ---
pdq.SetVisits("channel", "message", mean_visits, service_time)
#---- Must import the CANONical method for an open circuit -----------
pdq.Solve(pdq.CANON)
pdq.Report()
#---------------------------------------------------------------------
import pdq
L = 50
S = 0.01
pdq.Init("example 7")
nodes = pdq.CreateNode("Kanal", pdq.CEN, pdq.FCFS)
stream = pdq.CreateOpen("Poruka", L)
pdq.SetVisits("Kanal", "Poruka", 1.0 / 0.7, S)
# pdq.SetDemand("Kanal", "Poruka", S)
pdq.Solve(pdq.CANON)
pdq.Report()