Slow ethernet in linux

[baryluk]

netperf tests with standard pfifo_fast

Code:

$ netperf -H wielkiczarny.local -l 60 -t TCP_STREAM
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to wielkiczarny.local () port 0 AF_INET : demo
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

87380  16384  16384    60.00     695.63

Code:

$ netperf -H wielkiczarny.local -l 60 -t TCP_STREAM
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to wielkiczarny.local () port 0 AF_INET : demo
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

87380  16384  16384    60.00     702.86

Code:

$ netperf -H wielkiczarny.local -l 60 -t TCP_MAERTS
MIGRATED TCP MAERTS TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to wielkiczarny.local () port 0 AF_INET : demo
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

87380  16384  16384    60.00     733.93

Code:

$ netperf -H wielkiczarny.local -l 60 -t UDP_STREAM
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to wielkiczarny.local () port 0 AF_INET : demo
Socket  Message  Elapsed      Messages                
Size    Size     Time         Okay Errors   Throughput
bytes   bytes    secs            #      #   10^6bits/sec

212992   65507   60.00      101426      0     885.87
212992           60.00        4087             35.70

Code:

$ netperf -H wielkiczarny.local -l 60 -t UDP_RR
MIGRATED UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to wielkiczarny.local () port 0 AF_INET : demo : first burst 0
Local /Remote
Socket Size   Request  Resp.   Elapsed  Trans.
Send   Recv   Size     Size    Time     Rate        
bytes  Bytes  bytes    bytes   secs.    per sec  

212992 212992 1        1       60.00    8486.10  
212992 212992

Code:

$ ip l show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether 7a:6e:63:xx:xx:xx brd ff:ff:ff:ff:ff:ff

Still It is unclear to me why wget from Internet is pretty slow at ~4-6MB/s, and maks 10MB/s at the start of download.