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Re: [ns] Segmentation fault in Nortel's Diffserv Module

To: Xiang <[email protected]>
Subject: Re: [ns] Segmentation fault in Nortel's Diffserv Module
From: Xuan Chen <[email protected]>
Date: Wed, 21 Mar 2001 10:54:01 -0800 (PST)
cc: [email protected]
In-Reply-To: <[email protected]>
Sender: [email protected]
I did not get the same error as you mentioned. I would suggest you to make
sure the diffserv module in your ns works ok. YOu probably want to run its
testsuite first:

~ns/tcl/test/test-all-diffserv

Thanks.
-chen xuan

On Wed, 21 Mar 2001, Sudhindra Suresh Bengeri wrote:

> Xiang,
> 
> I ran the script it did not encounter any seg faults. Hence I think the
> script is ok there must be some problem with the .cc/.h files of the
> diffserv impl. Have you tried gdb'ing ns when you got the seg fault.
> 
> I had some problem with the CBQ object that you had for the node <-> edge
> links, changed it to DropTail and it worked fine, but that was not the
> problem you were looking for right.
> 
> Regards,
> Sudhin.
> 
> On Wed, 21 Mar 2001, Xiang wrote:
> 
> > Hi,
> > I'm sorry to make inconvenient to you. The whole script is shown below.
> >
> > #---------------------------------------------------------------------------
> > -----
> > # Diffservtest.tcl
> > # Author: Xiang
> > # Dates: Mar, 2001.
> > # Notes: A DS-RED script that uses trTCM policer which satisfied AR-PDB.
> > #        Modified from ds-cbr-trTCM.tcl
> > #
> > #    ----
> > #    |s1|-----------
> > #    ----   10 Mb   \
> > #            5 ms    \
> > #                     \----           ------          ----           ------
> > #                      |e1|-----------|core|----------|e2|-----------|dest|
> > #                     /----   10 Mb   ------   5 Mb   ----   10 Mb   ------
> > #                    /         5 ms            5 ms           5 ms
> > #    ----           /
> > #    |s2|-----------
> > #    ----   10 Mb
> > #            5 ms
> > #
> > #---------------------------------------------------------------------------
> > -----
> >
> >
> > set ns [new Simulator]
> >
> > set cir0  1000000
> > set cbs0     2000
> > set pir0  1000000
> > set pbs0     3000
> > set rate0 3000000
> > set cir1  1000000
> > set cbs1     2000
> > set pir1  1000000
> > set pbs1     3000
> > set rate1 3000000
> >
> > set testTime 85.0
> > set packetSize 1000
> >
> >
> > # Set up the network topology shown at the top of this file:
> > set s1 [$ns node]
> > set s2 [$ns node]
> > set e1 [$ns node]
> > set core [$ns node]
> > set e2 [$ns node]
> > set dest [$ns node]
> >
> > $ns duplex-link $s1 $e1 10Mb 5ms CBQ
> > $ns duplex-link $s2 $e1 10Mb 5ms CBQ
> >
> > $ns simplex-link $e1 $core 10Mb 5ms dsRED/edge
> > $ns simplex-link $core $e1 10Mb 5ms dsRED/core
> >
> >
> > $ns simplex-link $core $e2 5Mb 5ms dsRED/core
> > $ns simplex-link $e2 $core 5Mb 5ms dsRED/edge
> >
> > $ns duplex-link $e2 $dest 10Mb 5ms CBQ
> >
> >
> > $ns duplex-link-op $s1 $e1 orient down-right
> > $ns duplex-link-op $s2 $e1 orient up-right
> > $ns duplex-link-op $e1 $core orient right
> > $ns duplex-link-op $core $e2 orient right
> > $ns duplex-link-op $e2 $dest orient right
> >
> >
> > set qE1C [[$ns link $e1 $core] queue]
> > set qE2C [[$ns link $e2 $core] queue]
> > set qCE1 [[$ns link $core $e1] queue]
> > set qCE2 [[$ns link $core $e2] queue]
> >
> > # Set DS RED parameters from Edge1 to Core:
> > $qE1C meanPktSize $packetSize
> > $qE1C set numQueues_ 2
> > $qE1C setNumPrec 3
> > puts "qE1C set ok"
> > $qE1C addPolicyEntry [$s1 id] [$dest id] trTCM 10 $cir0 $cbs0 $pir0 $pbs0
> > $qE1C addPolicyEntry [$s2 id] [$dest id] trTCM 18 $cir1 $cbs1 $pir1 $pbs1
> > puts "addpolicyEntry ok"
> > $qE1C addPolicerEntry trTCM 10 12 14
> > $qE1C addPolicerEntry trTCM 18 20 22
> > puts "addPolicerEntry OK!"
> > $qE1C addPHBEntry 10 0 0
> > $qE1C addPHBEntry 12 0 1
> > $qE1C addPHBEntry 14 0 2
> > $qE1C addPHBEntry 18 1 0
> > $qE1C addPHBEntry 20 1 1
> > $qE1C addPHBEntry 22 1 2
> > puts "qE1C addPHBEntry OK!"
> >
> > $qE1C configQ 0 0 80 100 0.02
> > $qE1C configQ 0 1 60 80 0.10
> > $qE1C configQ 0 2 40 60 0.20
> > $qE1C configQ 1 0 20 40 0.10
> >
> > $qE1C configQ 1 1 10 20 0.20
> > puts "OK!"
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   segmentation fault happend here, NO OK
> > message
> > $qE1C configQ 1 2 5 10 0.30
> > puts "qE1C ok!"
> >
> > # Set DS RED parameters from Edge2 to Core:
> > $qE2C meanPktSize $packetSize
> > $qE2C set numQueues_ 1
> > $qE2C setNumPrec 3
> > $qE2C addPolicyEntry [$dest id] [$s1 id] trTCM 10 $cir0 $cbs0 $pir0 $pbs0
> > $qE2C addPolicyEntry [$dest id] [$s2 id] trTCM 10 $cir1 $cbs1 $pir1 $pbs1
> > $qE2C addPolicerEntry trTCM 10 12 14
> > $qE2C addPHBEntry 10 0 0
> > $qE2C addPHBEntry 12 0 1
> > $qE2C addPHBEntry 14 0 2
> > $qE2C configQ 0 0 20 40 0.02
> > $qE2C configQ 0 1 10 20 0.10
> > $qE2C configQ 0 2  5 10 0.20
> >
> > # Set DS RED parameters from Core to Edge1:
> > $qCE1 meanPktSize $packetSize
> > $qCE1 set numQueues_ 1
> > $qCE1 setNumPrec 3
> > $qCE1 addPHBEntry 10 0 0
> > $qCE1 addPHBEntry 12 0 1
> > $qCE1 addPHBEntry 14 0 2
> > $qCE1 configQ 0 0 20 40 0.02
> > $qCE1 configQ 0 1 10 20 0.10
> > $qCE1 configQ 0 2  5 10 0.20
> >
> > # Set DS RED parameters from Core to Edge2:
> > $qCE2 meanPktSize $packetSize
> > $qCE2 set numQueues_ 2
> > $qCE2 setNumPrec 3
> > $qCE2 addPHBEntry 10 0 0
> > $qCE2 addPHBEntry 12 0 1
> > $qCE2 addPHBEntry 14 0 2
> > $qCE2 addPHBEntry 18 1 0
> > $qCE2 addPHBEntry 20 1 1
> > $qCE2 addPHBEntry 22 1 2
> > $qCE2 configQ 0 0 80 120 0.02
> > $qCE2 configQ 0 1 40 60 0.10
> > $qCE2 configQ 0 2 20 40 0.20
> > $qCE2 configQ 1 0 20 40 0.10
> > $qCE2 configQ 1 1 10 20 0.20
> > $qCE2 configQ 1 2  5 10 0.30
> >
> >
> > # Set up one CBR connection between each source and the destination:
> > set udp0 [new Agent/UDP]
> > $ns attach-agent $s1 $udp0
> > set cbr0 [new Application/Traffic/CBR]
> > $cbr0 attach-agent $udp0
> > $cbr0 set packet_size_ $packetSize
> > $udp0 set packetSize_ $packetSize
> > $cbr0 set rate_ $rate0
> > set null0 [new Agent/Null]
> > $ns attach-agent $dest $null0
> > $ns connect $udp0 $null0
> >
> >
> > ## set up the exponential on/off source, parameterized by packet size,
> > ## ave on time, ave off time and peak rate
> >
> > #set udp1 [new Agent/UDP]
> > #$ns attach-agent $s2 $udp1
> > #set null1 [new Agent/Null]
> > #$ns attach-agent $dest $null1
> >
> > #$ns connect $udp1 $null1
> >
> > #set exp1 [new Application/Traffic/Exponential]
> > #$exp1 set packetSize_ $packetSize
> > #$exp1 set burst_time_ 500ms
> > #$exp1 set idle_time_ 500ms
> > #$exp1 set rate_ $rate1
> >
> > #$exp1 attach-agent $s1
> >
> > set udp1 [new Agent/UDP]
> > $ns attach-agent $s2 $udp1
> > set cbr1 [new Application/Traffic/CBR]
> > $cbr1 attach-agent $udp1
> > $cbr1 set packet_size_ $packetSize
> > $udp1 set packetSize_ $packetSize
> > $cbr1 set rate_ $rate1
> > set null1 [new Agent/Null]
> > $ns attach-agent $dest $null1
> > $ns connect $udp1 $null1
> >
> >
> > proc finish {} {
> >     global ns
> >     exit 0
> > }
> >
> >
> > $qE1C printPolicyTable
> > $qE1C printPolicerTable
> >
> > $ns at 0.0 "$cbr0 start"
> > $ns at 0.0 "$cbr1 start"
> > $ns at 20.0 "$qCE2 printStats"
> > $ns at 40.0 "$qCE2 printStats"
> > $ns at 60.0 "$qCE2 printStats"
> > $ns at 80.0 "$qCE2 printStats"
> > $ns at $testTime "$cbr0 stop"
> > $ns at $testTime "$cbr1 stop"
> > $ns at [expr $testTime + 1.0] "finish"
> >
> > $ns run
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Xuan Chen" <[email protected]>
> > To: "Xiang" <[email protected]>
> > Sent: Wednesday, March 21, 2001 10:22 AM
> > Subject: Re: [ns] Segmentation fault in Nortel's Diffserv Module
> >
> >
> > > I can't see the attachment. Could you please resend it to me or tell me a
> > > place I can get it? Thanks.
> > >
> > > btw, you can just copy and past it to your email.
> > >
> > > Cheers,
> > > -chen xuan
> > >
> >
> >
> >
> 
> ****************** Sudhindra Suresh Bengeri ********************
> Graduate Research Assistant   | Home:                          |
> to Dr. George N. Rouskas      | 2110, Gorman St.,              |
> EGRC 454H, Computer Sci. dept.| Raleigh, NC - 27606            |
> NCSU, Raleigh, NC 27695       | Ph. (919) 852-1961             |
> (919)515-3655(P) / 515-7925(F)
> My web projection: http://www4.ncsu.edu/~ssbenger
> 

-- 
Xuan Chen
USC/ISI
References:
- Re: [ns] Segmentation fault in Nortel's Diffserv Module
  - From: Sudhindra Suresh Bengeri <[email protected]>
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