Tu as oublié d'indiquer les données débit / ping.
Voici ce que cela donne avec ma Bbox fibre sur le réseau Numericable :
NDT test run towards M-Lab server ndt.iupui.mlab3.par01.measurement-lab.org
RTT between client and M-Lab server 11 ms
DOWNLOAD SPEED 92.9 Mbps
UPLOAD SPEED 5.0 Mbps
Client System Details
OS data:: Linux, Architecture: x86
Flash Info: Version = LNX 14,0,0,125
The slowest link in the end-to-end path is a 45 Mbps T3/DS3 subnet
Information: Other network traffic is congesting the link
This connection is network limited 97.06% of the time
45 Mbps T3/DS3 link found.
Link set to Full Duplex mode
Information: throughput is limited by other network traffic.
Good network cable(s) found
Normal duplex operation found.
Web100 reports the Round trip time = 30.47ms
the Packet size = 1448bytes
181 packets retransmitted
370 duplicate acks received
483 SACK blocks received
The connection was idle 0.00 seconds (0.00% of the time)
C2S throughput test: Packet queuing detected: 2.44%
S2C throughput test: Packet queuing detected: 2.44%
Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgement: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: ON
RFC 1323 Window Scaling:ON; Scaling Factors - Server=7, Client=7
The theoretical network limit is 72.81 Mbps
The NDT server has a 869.78 KByte buffer which limits the throughput to 446.08 Mbps
Your PC/Workstation has a 2890.50 KByte buffer which limits the throughput to 741.22 Mbps
The network based flow control limits the throughput to 191.82 Mbps
Client Data reports link is T3;
Client Acks report link is Ethernet
Server Data reports link is OC-48
Server Acks report link is OC-48
=== Results sent by the server ===
CurMSS: 1448
X_Rcvbuf: 87380
X_Sndbuf: 1781304
AckPktsOut: 0
BytesRetrans: 260664
CongAvoid: 35031
CongestionOverCount: 0
CongestionSignals: 2
CountRTT: 36014
CurCwnd: 362000
CurRTO: 230
CurRwinRcvd: 2959872
CurRwinSent: 5888
CurSsthresh: 231680
DSACKDups: 0
DataBytesIn: 0
DataBytesOut: 119327064
DataPktsIn: 0
DataPktsOut: 80631
DupAcksIn: 370
ECNEnabled: 0
FastRetran: 2
MaxCwnd: 765992
MaxMSS: 1448
MaxRTO: 254
MaxRTT: 59
MaxRwinRcvd: 2959872
MaxRwinSent: 5888
MaxSsthresh: 382272
MinMSS: 1448
MinRTO: 212
MinRTT: 11
MinRwinRcvd: 29312
MinRwinSent: 5792
NagleEnabled: 1
OtherReductions: 22
PktsIn: 36383
PktsOut: 80631
PktsRetrans: 181
RcvWinScale: 7
SACKEnabled: 3
SACKsRcvd: 483
SendStall: 0
SlowStart: 761
SampleRTT: 28
SmoothedRTT: 30
SndWinScale: 7
SndLimTimeRwin: 0
SndLimTimeCwnd: 9994077
SndLimTimeSender: 302292
SndLimTransRwin: 0
SndLimTransCwnd: 18
SndLimTransSender: 18
SndLimBytesRwin: 0
SndLimBytesCwnd: 118783376
SndLimBytesSender: 543688
SubsequentTimeouts: 0
SumRTT: 1097196
Timeouts: 0
TimestampsEnabled: 1
WinScaleRcvd: 7
WinScaleSent: 7
DupAcksOut: 0
StartTimeUsec: 596663
Duration: 10298763
c2sData: 4
c2sAck: 3
s2cData: 8
s2cAck: 8
half_duplex: 0
link: 0
congestion: 1
bad_cable: 0
mismatch: 0
spd: 92.71
bw: 72.81
loss: 0.000024804
avgrtt: 30.47
waitsec: 0.00
timesec: 10.00
order: 0.0102
rwintime: 0.0000
sendtime: 0.0294
cwndtime: 0.9706
rwin: 22.5820
swin: 13.5903
cwin: 5.8441
rttsec: 0.030466
Sndbuf: 1781304
aspd: 0.00000
CWND-Limited: -0.05
minCWNDpeak: 149144
maxCWNDpeak: 754408
CWNDpeaks: 2
Pour toi voici les lignes importantes :
16 packets retransmitted
The NDT server has a 713.18 KByte buffer which limits the throughput to 63.33 Mbps
Your PC/Workstation has a 2299.38 KByte buffer which limits the throughput to 102.10 Mbps
The network based flow control limits the throughput to 23.92 Mbps
MaxRTT: 253
MaxRwinRcvd: 2354560
MinMSS: 1448
MinRTO: 378
MinRTT: 174
Très peu de paquets perdus. Ce n'est pas la cause du débit limité.
Rwin de 2,3 Mo (données non acquittées max), cela permet au débit de monter
MSS de 1448, parfait.
La cause semble être le ping. Visiblement le ping min a été de 174 ms !