ndt-users list created

[Richard Carlson <>]

Hi Martyn;

FYI the ndt package comes with a 'C' program that will parse the log file 
(web100srv.log) and output a bunch of text for each test.  Look at the 
/usr/local/bin/analyze program.  The make process built and installed it 
for you.

Rich

At 11:34 AM 1/17/2006, Martyn wrote:
> Indeed it does Richard, I'm going to try and create a program with either 
> vb or php so the output can be posted in and then try and formulate the results
>
> Martyn
> ----- Original Message ----- From: "Richard Carlson" 
> <>
> To: "Martyn Cheatle" 
> <>;
>  
> <>
> Sent: Tuesday, January 17, 2006 4:00 PM
> Subject: Re: Outputs
>
>
> > Hi Martyn;
> >
> > These are the Web100 variables and values from the server-to-client test. 
> > The detailed description of each variable can be found in the web100 
> > kernel patch file.  Look at the tcp-kis.txt or 
> > draft-ietf-tswg-tcp-mib-extension-XX.txt file where ever you unpacked the 
> > kernel patch file (/usr/src/web100 in my case).
> >
> > To highlight this example, since the data is flowing from the server to 
> > the client and ACK's are coming back we see the server generated 11625 
> > data packets (DataPktsOut) and it received 5663 Acks in response or about 
> > 1 Ack for every 2 data packets (a typical delayed ack scenario).
> >
> > Since the client never sent any data, on this socket, the server never 
> > returned any ACKs (AckPktsOut: 0)
> >
> > Does this help?
> >
> > Rich
> >
> > At 09:20 AM 1/17/2006, Martyn Cheatle wrote:
> >
> > > Is there a site I can visit that will show me what each of the below 
> > > outputs mean, for example take AckPktsIn: 5663, AckPktsOut: 0
> > >
> > > I need to know how to read them to see if they are good or bad results
> > >
> > > Regards
> > >
> > > Martyn
> > >
> > > WEB100 Kernel Variables:
> > > Client: localhost/127.0.0.1
> > > AckPktsIn: 5663
> > > AckPktsOut: 0
> > > BytesRetrans: 29200
> > > CongAvoid: 4208
> > > CongestionOverCount: 0
> > > CongestionSignals: 19
> > > CountRTT: 5072
> > > CurCwnd: 29200
> > > CurMSS: 1460
> > > CurRTO: 224
> > > CurRwinRcvd: 65535
> > > CurRwinSent: 5840
> > > CurSsthresh: 27740
> > > DSACKDups: 0
> > > DataBytesIn: 0
> > > DataBytesOut: 17600250
> > > DataPktsIn: 0
> > > DataPktsOut: 11625
> > > DupAcksIn: 572
> > > ECNEnabled: 0
> > > FastRetran: 19
> > > MaxCwnd: 65700
> > > MaxMSS: 1460
> > > MaxRTO: 236
> > > MaxRTT: 50
> > > MaxRwinRcvd: 65535
> > > MaxRwinSent: 5840
> > > MaxSsthresh: 51100
> > > MinMSS: 1460
> > > MinRTO: 222
> > > MinRTT: 21
> > > MinRwinRcvd: 48015
> > > MinRwinSent: 5840
> > > NagleEnabled: 1
> > > OtherReductions: 7
> > > PktsIn: 5665
> > > PktsOut: 11628
> > > PktsRetrans: 20
> > > X_Rcvbuf: 33554432
> > > RcvWinScale: 2147483647
> > > SACKEnabled: 3
> > > SACKsRcvd: 583
> > > SendStall: 0
> > > SlowStart: 343
> > > SampleRTT: 23
> > > SmoothedRTT: 24
> > > X_Sndbuf: 33554432
> > > SndWinScale: 2147483647
> > > SndLimTimeRwin: 932986
> > > SndLimTimeCwnd: 11058774
> > > SndLimTimeSender: 20959
> > > SndLimTransRwin: 4
> > > SndLimTransCwnd: 5
> > > SndLimTransSender: 1
> > > SndLimBytesRwin: 1716876
> > > SndLimBytesCwnd: 15887916
> > > SndLimBytesSender: 0
> > > SubsequentTimeouts: 0
> > > SumRTT: 143304
> > > Timeouts: 0
> > > TimestampsEnabled: 0
> > > WinScaleRcvd: 2147483647
> > > WinScaleSent: 2147483647
> > > DupAcksOut: 0
> > > StartTimeUsec: 747146
> > > Duration: 12020338
> > > c2sData: 2
> > > c2sAck: 2
> > > s2cData: 6
> > > s2cAck: 4
> > > half_duplex: 1
> > > link: 0
> > > congestion: 0
> > > bad_cable: 0
> > > mismatch: 0
> > > spd: 0.00
> > > bw: 9.75
> > > loss: 0.001633987
> > > avgrtt: 28.25
> > > waitsec: 0.00
> > > timesec: 12.00
> > > order: 0.1010
> > > rwintime: 0.0777
> > > sendtime: 0.0017
> > > cwndtime: 0.9206
> > > rwin: 0.5000
> > > swin: 256.0000
> > > cwin: 0.5013
> > > rttsec: 0.028254
> > > Sndbuf: 33554432
> > > aspd: 21.71750
> > >
> > > Checking for mismatch on uplink
> > >         (speed > 50 [0>50], (xmitspeed < 5) [1.03<5]
> > >         (rwintime > .9) [0.07>.9], (loss < .01) [0.00<.01]
> > > Checking for excessive errors condition
> > >         (loss/sec > .15) [1.36>.15], (cwndtime > .6) [0.92>.6],
> > >         (loss < .01) [0.00<.01], (MaxSsthresh > 0) [51100>0]
> > > Checking for 10 Mbps link
> > >         (speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0]
> > >         (xmitspeed < 9.5) [1.03<9.5] (loss < .01) [0.00<.01], (mylink > 
> > > 0) [3.0>0]
> > > Checking for Wireless link
> > >         (sendtime = 0) [0.00=0], (speed < 5) [0<5]
> > >         (Estimate > 50 [9.75>50], (Rwintime > 90) [0.07>.90]
> > >          (RwinTrans/CwndTrans = 1) [4/5=1], (mylink > 0) [3.0>0]
> > > Checking for DSL/Cable Modem link
> > >         (speed < 2) [0<2], (SndLimTransSender = 0) [1=0]
> > >          (SendTime = 0) [0.0017=0], (mylink > 0) [3.0>0]
> > > Checking for half-duplex condition
> > >         (rwintime > .95) [0.07>.95], (RwinTrans/sec > 30) [0.33>30],
> > >          (SenderTrans/sec > 30) [0.08>30], OR (mylink <= 10) [3.0<=10]
> > > Checking for congestion
> > >         (cwndtime > .02) [0.92>.02], (mismatch = 0) [0=0]
> > >         (MaxSsthresh > 0) [51100>0]
> > >
> > > estimate = 9.75 based on packet size = 11Kbits, RTT = 28.25msec, and 
> > > loss = 0.001633987
> > > The theoretical network limit is 9.75 Mbps
> > > The NDT server has a 32768.0 KByte buffer which limits the throughput to 
> > > 9060.66 Mbps
> > > Your PC/Workstation has a 63.0 KByte buffer which limits the throughput 
> > > to 17.69 Mbps
> > > The network based flow control limits the throughput to 17.74 Mbps
> > >
> > > Client Data reports link is 'T1', Client Acks report link is 'T1'
> > > Server Data reports link is 'OC-12', Server Acks report link is 'T3'
> > >
> > >
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> > >
> > > ntl Group Limited
> >
> > ------------------------------------
> >
> >
> >
> > Richard A. Carlson                              e-mail: 
> >
> > Network Engineer                                phone:  (734) 352-7043
> > Internet2                                       fax:    (734) 913-4255
> > 1000 Oakbrook Dr; Suite 300
> > Ann Arbor,  MI  48104

------------------------------------



Richard A. Carlson                              e-mail: 

Network Engineer                                phone:  (734) 352-7043
Internet2                                       fax:    (734) 913-4255
1000 Oakbrook Dr; Suite 300
Ann Arbor,  MI  48104