This TCL script is retrieved from http://www.pollere.net/CoDel.html in November 2013 :)
# Codel test script v120513 # Run this to run CoDel AQM tests. # ns codel.tcl f w c {b}Mb s d r # where: # f = # ftps # w = # PackMime connections per second # c = # CBRs # b = bottleneck bandwidth in Mbps # s = filesize for ftp, -1 for infinite # d = dynamic bandwidth, if non-zero, changes (kind of kludgey) # have to set the specific change ratios in this file (below) # r = number of "reverse" ftps set stopTime 300 set ns [new Simulator] # These are defaults if values not set on command line set num_ftps 1 set web_rate 0 set revftp 0 set num_cbrs 0 #rate and packetSize set in build_cbr set bottleneck 3Mb #for a 10MB ftp set filesize 10000000 set dynamic_bw 0 set greedy 0 # Parse command line if {$argc >= 1} { set num_ftps [lindex $argv 0] if {$argc >= 2} { set web_rate [lindex $argv 1] if {$argc >= 3} { set num_cbrs [lindex $argv 2] if {$argc >= 4} { set bottleneck [lindex $argv 3] if {$argc >= 5} { set filesize [lindex $argv 4] if {$argc >= 6} { set dynamic_bw [lindex $argv 5] if {$argc >= 7} { set revftp [lindex $argv 6] } } } } } } } set bw [bw_parse $bottleneck] if { $revftp >= 1} { set num_revs $revftp } else { set num_revs 0 } puts "ftps $num_ftps webrate $web_rate cbrs $num_cbrs bw $bw filesize $filesize reverse $num_revs" # experiment settings set psize 1500 if { $bw < 1000000} { set psize 500 } set nominal_rtt [delay_parse 100ms] set accessdly 20 set bdelay 10 set realrtt [expr 2*(2*$accessdly + $bdelay)] puts "accessdly $accessdly bneckdly $bdelay realrtt $realrtt bneckbw $bw" # CoDel values # interval to keep min over set interval [delay_parse 100ms] # target in ms. set target [delay_parse 5ms] global defaultRNG $defaultRNG seed 0 ns-random 0 #$defaultRNG seed 54321 #ns-random 23145 # ------- config info is all above this line ---------- #bdp in packets, based on the nominal rtt set bdp [expr round($bw*$nominal_rtt/(8*$psize))] Trace set show_tcphdr_ 1 set startTime 0.0 #TCP parameters - have to set both for FTPs and PackMime Agent/TCP set window_ [expr $bdp*16] Agent/TCP set segsize_ [expr $psize-40] Agent/TCP set packetSize_ [expr $psize-40] Agent/TCP set windowInit_ 4 Agent/TCP set segsperack_ 1 Agent/TCP set timestamps_ true set delack 0.4 Agent/TCP set interval_ $delack Agent/TCP/FullTcp set window_ [expr $bdp*16] Agent/TCP/FullTcp set segsize_ [expr $psize-40] Agent/TCP/FullTcp set packetSize_ [expr $psize-40] Agent/TCP/FullTcp set windowInit_ 4 Agent/TCP/FullTcp set segsperack_ 1 Agent/TCP/FullTcp set timestamps_ true Agent/TCP/FullTcp set interval_ $delack Agent/TCP/Linux instproc done {} { global ns filesize #this doesn't seem to work, had to hack tcp-linux.cc to do repeat ftps $self set closed_ 0 #needs to be delayed by at least .3sec to slow start puts "[$ns now] TCP/Linux proc done called" $ns at [expr [$ns now] + 0.3] "$self send $filesize" } # problem is that idle() in tcp.cc never seems to get called... Application/FTP instproc resume {} { puts "called resume" global filesize $self send $filesize # $ns at [expr [$ns now] + 0.5] "[$self agent] reset" $ns at [expr [$ns now] + 0.5] "[$self agent] send $filesize" } Application/FTP instproc fire {} { global filesize $self instvar maxpkts_ set maxpkts_ $filesize [$self agent] set maxpkts_ $filesize $self send $maxpkts_ puts "fire() FTP" } #buffersizes set buffersize [expr $bdp] set buffersize1 [expr $bdp*10] Queue/CoDel set target_ $target Queue/CoDel set interval_ $interval #set Flow_id 1 proc build_topology { ns which } { # nodes n0 and n1 are the server and client side gateways and # the link between them is the congested slow link. n0 -> n1 # handles all the server to client traffic. # # if the web_rate is non-zero, node n2 will be the packmime server cloud # and node n3 will be the client cloud. # # num_ftps server nodes and client nodes are created for the ftp sessions. # the first client node is n{2+w} and the first server node is n{2+f+w} # where 'f' is num_ftps and 'w' is 1 if web_rate>0 and 0 otherwise. # servers will be even numbered nodes, clients odd # Warning: the numbering here is ridiculously complicated global bw bdelay accessdly buffersize buffersize1 filesize node_cnt set node_cnt 2 # congested link global n0 n1 set n0 [$ns node] set n1 [$ns node] $ns duplex-link $n0 $n1 $bw ${bdelay}ms CoDel $ns duplex-link-op $n0 $n1 orient right $ns duplex-link-op $n0 $n1 queuePos 0.5 $ns duplex-link-op $n1 $n0 queuePos 1.5 $ns queue-limit $n0 $n1 $buffersize $ns queue-limit $n1 $n0 $buffersize set node_cnt 2 #dynamic bandwidth # these are the multipliers for changing bw, times initial set bw # edit these values to get different patterns global stopTime dynamic_bw array names bw_changes set bw_changes(1) 0.1 set bw_changes(2) 0.01 set bw_changes(3) 0.5 set bw_changes(4) 0.01 set bw_changes(5) 1.0 puts "bottleneck starts at [[[$ns link $n0 $n1] link] set bandwidth_]bps" for {set k 1} {$k <= $dynamic_bw} {incr k 1} { set changeTime [expr $k*$stopTime/($dynamic_bw+1)] set f $bw_changes($k) set newBW [expr $f*$bw] puts "change at $changeTime to [expr $newBW/1000000.]Mbps" $ns at $changeTime "[[$ns link $n0 $n1] link] set bandwidth_ $newBW" $ns at $changeTime "[[$ns link $n1 $n0] link] set bandwidth_ $newBW" $ns at $changeTime "puts $newBW" } set li_10 [[$ns link $n1 $n0] queue] set li_01 [[$ns link $n0 $n1] queue] set tchan_ [open /tmp/redqvar.tr w] $li_01 trace curq_ $li_01 trace d_exp_ $li_01 attach $tchan_ global num_ftps web_rate num_cbrs greedy num_revs set linkbw [expr $bw*10] set w [expr $web_rate > 0] if {$w} { global n2 n3 #server set n2 [$ns node] $ns duplex-link $n2 $n0 $linkbw ${accessdly}ms DropTail $ns queue-limit $n2 $n0 $buffersize1 $ns queue-limit $n0 $n2 $buffersize1 #client set n3 [$ns node] $ns duplex-link $n1 $n3 $linkbw ${accessdly}ms DropTail $ns queue-limit $n1 $n3 $buffersize1 $ns queue-limit $n3 $n1 $buffersize1 set node_cnt 4 } #need to fix the angles if use nam for {set k 0} {$k < $num_ftps} {incr k 1} { # servers set j $node_cnt global n$j set n$j [$ns node] if {$greedy > 0 && $k == 0} { $ns duplex-link [set n$j] $n0 $linkbw 1ms DropTail } else { $ns duplex-link [set n$j] $n0 $linkbw ${accessdly}ms DropTail } $ns queue-limit [set n$j] $n0 $buffersize1 $ns queue-limit $n0 [set n$j] $buffersize1 set angle [expr $num_ftps>1? 0.75+($k-1)*.5/($num_ftps-1) : 1] $ns duplex-link-op $n0 [set n$j] orient $angle incr node_cnt # clients set j $node_cnt global n$j set n$j [$ns node] set dly [expr ${accessdly} +($k+1)] $ns duplex-link $n1 [set n$j] $linkbw ${dly}ms DropTail $ns queue-limit $n1 [set n$j] $buffersize1 $ns queue-limit [set n$j] $n1 $buffersize1 set angle [expr $num_ftps>1? fmod(2.25-($k-1)*.5/($num_ftps-1), 2) : 0] $ns duplex-link-op $n1 [set n$j] orient $angle incr node_cnt } for {set k 0} {$k < $num_cbrs} {incr k 1} { # servers set j $node_cnt global n$j set n$j [$ns node] $ns duplex-link [set n$j] $n0 $linkbw ${accessdly}ms DropTail $ns queue-limit [set n$j] $n0 $buffersize1 $ns queue-limit $n0 [set n$j] $buffersize1 # set angle [expr $num_cbrs>1? 0.75+($k-1)*.5/($num_cbrs-1) : 1] $ns duplex-link-op $n0 [set n$j] orient $angle incr node_cnt # clients set j $node_cnt global n$j set n$j [$ns node] $ns duplex-link $n1 [set n$j] $linkbw ${accessdly}ms DropTail $ns queue-limit $n1 [set n$j] $buffersize1 $ns queue-limit [set n$j] $n1 $buffersize1 # set angle [expr $num_cbrs>1? fmod(2.25-($k-1)*.5/($num_ftps-1), 2) : 0] $ns duplex-link-op $n1 [set n$j] orient $angle incr node_cnt } #reverse direction ftps for {set k 0} {$k < $num_revs} {incr k 1} { # clients set j $node_cnt global n$j set n$j [$ns node] $ns duplex-link [set n$j] $n0 $linkbw ${accessdly}ms DropTail $ns queue-limit [set n$j] $n0 $buffersize1 $ns queue-limit $n0 [set n$j] $buffersize1 set angle [expr $num_ftps>1? 0.75+($k-1)*.5/($num_ftps-1) : 1] $ns duplex-link-op $n0 [set n$j] orient $angle incr node_cnt # servers set j $node_cnt global n$j set n$j [$ns node] set dly [expr ($accessdly)*1.1 +($k+1)] $ns duplex-link $n1 [set n$j] $linkbw ${dly}ms DropTail $ns queue-limit $n1 [set n$j] $buffersize1 $ns queue-limit [set n$j] $n1 $buffersize1 set angle [expr $num_ftps>1? fmod(2.25-($k-1)*.5/($num_ftps-1), 2) : 0] $ns duplex-link-op $n1 [set n$j] orient $angle incr node_cnt } } proc build_cbr {cnd snd startTime timeToStop Flow_id} { global ns set udp [$ns create-connection UDP $snd LossMonitor $cnd $Flow_id] set cbr [new Application/Traffic/CBR] $cbr attach-agent $udp # change these for different types of CBRs $cbr set packetSize_ 100 $cbr set rate_ 0.064Mb $ns at $startTime "$cbr start" $ns at $timeToStop "$cbr stop" } # cnd is client node, snd is server node proc build_ftpclient {cnd snd startTime timeToStop Flow_id} { global ns filesize greedy revftp set ctcp [$ns create-connection TCP/Linux $snd TCPSink/Sack1 $cnd $Flow_id] $ctcp select_ca cubic set ftp [$ctcp attach-app FTP] $ftp set enableResume_ true $ftp set type_ FTP #set up a single infinite ftp with smallest RTT if {$greedy > 0 || $filesize < 0} { $ns at $startTime "$ftp start" set greedy 0 } else { $ns at $startTime "$ftp send $filesize" } $ns at $timeToStop "$ftp stop" } proc build_webs {cnd snd rate startTime timeToStop} { set CLIENT 0 set SERVER 1 # SETUP PACKMIME set pm [new PackMimeHTTP] $pm set-TCP Sack $pm set-client $cnd $pm set-server $snd $pm set-rate $rate; # new connections per second $pm set-http-1.1; # use HTTP/1.1 # create RandomVariables set flow_arrive [new RandomVariable/PackMimeHTTPFlowArrive $rate] set req_size [new RandomVariable/PackMimeHTTPFileSize $rate $CLIENT] set rsp_size [new RandomVariable/PackMimeHTTPFileSize $rate $SERVER] # assign RNGs to RandomVariables $flow_arrive use-rng [new RNG] $req_size use-rng [new RNG] $rsp_size use-rng [new RNG] # set PackMime variables $pm set-flow_arrive $flow_arrive $pm set-req_size $req_size $pm set-rsp_size $rsp_size global ns $ns at $startTime "$pm start" $ns at $timeToStop "$pm stop" } proc uniform {a b} { expr $a + (($b- $a) * ([ns-random]*1.0/0x7fffffff)) } proc finish {} { global ns $ns halt $ns flush-trace exit 0 } # $ns namtrace-all [open out.nam w] # $ns color 2 blue # $ns color 3 red # $ns color 4 yellow # $ns color 5 green build_topology $ns CoDel #$ns trace-queue $n0 $n1 [open out_n0ton1.tr w] #set fname f${num_ftps}w${web_rate}b${bottleneck}.tr set fname f.tr puts $fname $ns trace-queue $n0 $n1 [open /tmp/$fname w] #reverse direction #$ns trace-queue $n1 $n0 [open /tmp/$fname w] set node_cnt 2 if {$web_rate > 0} { build_webs $n3 $n2 $web_rate 0 $stopTime set node_cnt 4 } for {set k 1} {$k <= $num_ftps} {incr k 1} { set j $node_cnt incr node_cnt set i $node_cnt build_ftpclient [set n$i] [set n$j] \ $startTime $stopTime $i # [expr 1.0*($k-1)] $stopTime $i # [expr $startTime+($k-1)*[uniform 0.0 2.0]] $stopTime $i incr node_cnt } for {set k 1} {$k <= $num_cbrs} {incr k 1} { set j $node_cnt incr node_cnt set i $node_cnt build_cbr [set n$i] [set n$j] \ [expr $startTime+($k-1)*[uniform 0.0 2.0]] $stopTime $i incr node_cnt } #for reverse direction, give client smaller number for {set k 1} {$k <= $num_revs} {incr k 1} { set j $node_cnt incr node_cnt set i $node_cnt build_ftpclient [set n$j] [set n$i] $startTime $stopTime $j incr node_cnt } $ns at [expr $stopTime ] "finish" $ns run exit 0
转载于:https://www.cnblogs.com/F-32/p/3444116.html
