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Old 02-25-2009, 09:54 AM   #1 (permalink)
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What do these M-Lab test results mean??

Hey guys. If you can tell me what these results mean I'd appreciate that. I have half of the slightest clue what all this means!

Thanks I appreciate your time.

Quote:
WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
checking for firewalls . . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client-to-server [C2S]) . . . . . 264.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 445.78kb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0

------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 272.54 msec; the Packet size = 1452 Bytes; and
There were 1 packets retransmitted, 11 duplicate acks received, and 0 SACK blocks received
The connection was idle 0 seconds (0%) of the time
S2C throughput test: Packet queuing detected: 98.08%
This connection is receiver limited 57.17% of the time.
Increasing the the client's receive buffer (17.0 KB) will improve performance
This connection is network limited 42.54% of the time.

Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: OFF
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: OFF

Server 'ndt.iupui.nuq01.measurement-lab.org' is not behind a firewall. [Connection to the ephemeral port was successful]
Client is probably behind a firewall. [Connection to the ephemeral port failed]
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
Server says [75.168.xxx.xxx] but Client says [192.168.x.xxx]


More Details:
WEB100 Kernel Variables:
Client: localhost/127.0.0.1
CurMSS: 1452
X_Rcvbuf: 33554432
X_Sndbuf: 33554432
AckPktsIn: 209
AckPktsOut: 0
BytesRetrans: 1452
CongAvoid: 142
CongestionOverCount: 0
CongestionSignals: 1
CountRTT: 197
CurCwnd: 26136
CurRTO: 501
CurRwinRcvd: 17424
CurRwinSent: 5840
CurSsthresh: 8712
DSACKDups: 0
DataBytesIn: 0
DataBytesOut: 617924
DataPktsIn: 0
DataPktsOut: 422
DupAcksIn: 11
ECNEnabled: 0
FastRetran: 1
MaxCwnd: 26136
MaxMSS: 1452
MaxRTO: 508
MaxRTT: 350
MaxRwinRcvd: 17424
MaxRwinSent: 5840
MaxSsthresh: 8712
MinMSS: 1452
MinRTO: 402
MinRTT: 126
MinRwinRcvd: 17424
MinRwinSent: 5840
NagleEnabled: 1
OtherReductions: 2
PktsIn: 209
PktsOut: 422
PktsRetrans: 1
RcvWinScale: -1
SACKEnabled: 0
SACKsRcvd: 0
SendStall: 0
SlowStart: 19
SampleRTT: 300
SmoothedRTT: 298
SndWinScale: -1
SndLimTimeRwin: 6306661
SndLimTimeCwnd: 4693349
SndLimTimeSender: 31635
SndLimTransRwin: 3
SndLimTransCwnd: 3
SndLimTransSender: 1
SndLimBytesRwin: 357508
SndLimBytesCwnd: 260416
SndLimBytesSender: 0
SubsequentTimeouts: 0
SumRTT: 53691
Timeouts: 0
TimestampsEnabled: 0
WinScaleRcvd: -1
WinScaleSent: -1
DupAcksOut: 0
StartTimeUsec: 653057
Duration: 11033875
c2sData: 2
c2sAck: 2
s2cData: 2
s2cAck: 2
half_duplex: 0
link: 100
congestion: 0
bad_cable: 0
mismatch: 0
spd: 0.45
bw: 0.83
loss: 0.002369668
avgrtt: 272.54
waitsec: 0.00
timesec: 11.00
order: 0.0526
rwintime: 0.5717
sendtime: 0.0029
cwndtime: 0.4254
rwin: 0.1329
swin: 256.0000
cwin: 0.1994
rttsec: 0.272543
Sndbuf: 33554432
aspd: 0.00000
CWND-Limited: 152.48
minCWNDpeak: 2904
maxCWNDpeak: 23232
CWNDpeaks: 1

The theoretical network limit is 0.83 Mbps
The NDT server has a 16384.0 KByte buffer which limits the throughput to 939.30 Mbps
Your PC/Workstation has a 17.0 KByte buffer which limits the throughput to 0.48 Mbps
The network based flow control limits the throughput to 0.73 Mbps
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Old 02-25-2009, 10:17 AM   #2 (permalink)
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Re: What do these M-Lab test results mean??

What were you wanting to find out? Instead of going through everything
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