Re: Network performance - iperf

[Michal Simek]

Michal Simek wrote:
> Eric Dumazet wrote:
> > Le lundi 29 mars 2010 Ã 13:33 +0200, Michal Simek a Ãcrit :
> >
> > > Do you have any idea howto improve TCP/UDP performance in general?
> > > Or tests which can point me on weak places.
> >
> > Could you post "netstat -s" on your receiver, after fresh boot and your
> > iperf session, for 32 MB and 256 MB ram case ?
>
> I am not sure if is helpful but look below.
Sorry I forget to c&p that second part. :-(

Look below.
Michal

32MB

~ # cat /proc/meminfo | head -n 1
MemTotal:          30024 kB
~ # iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  6] local 192.168.0.10 port 5001 connected with 192.168.0.101 port 43577
[ ID] Interval       Transfer     Bandwidth
[  6]  0.0-50.0 sec  78.0 MBytes  13.1 Mbits/sec
~ # ./netstat -s
Ip:
    56596 total packets received
    0 forwarded
    0 incoming packets discarded
    56596 incoming packets delivered
    15752 requests sent out
Icmp:
    0 ICMP messages received
    0 input ICMP message failed.
    ICMP input histogram:
    0 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
Tcp:
    0 active connections openings
    1 passive connection openings
    0 failed connection attempts
    0 connection resets received
    0 connections established
    56596 segments received
    15752 segments send out
    0 segments retransmited
    0 bad segments received.
    0 resets sent
Udp:
    0 packets received
    0 packets to unknown port received.
    0 packet receive errors
    0 packets sent
    RcvbufErrors: 0
    SndbufErrors: 0
UdpLite:
    InDatagrams: 0
    NoPorts: 0
    InErrors: 0
    OutDatagrams: 0
    RcvbufErrors: 0
    SndbufErrors: 0
error parsing /proc/net/snmp: Success



256MB


~ # cat /proc/meminfo | head -n 1
MemTotal:         257212 kB
~ # iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  6] local 192.168.0.10 port 5001 connected with 192.168.0.101 port 46069
[ ID] Interval       Transfer     Bandwidth
[  6]  0.0-50.2 sec  19.5 MBytes  3.26 Mbits/sec
~ # ./netstat -s
Ip:
    14163 total packets received
    0 forwarded
    0 incoming packets discarded
    14163 incoming packets delivered
    5209 requests sent out
Icmp:
    0 ICMP messages received
    0 input ICMP message failed.
    ICMP input histogram:
    0 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
Tcp:
    0 active connections openings
    1 passive connection openings
    0 failed connection attempts
    0 connection resets received
    0 connections established
    14163 segments received
    5209 segments send out
    0 segments retransmited
    0 bad segments received.
    0 resets sent
Udp:
    0 packets received
    0 packets to unknown port received.
    0 packet receive errors
    0 packets sent
    RcvbufErrors: 0
    SndbufErrors: 0
UdpLite:
    InDatagrams: 0
    NoPorts: 0
    InErrors: 0
    OutDatagrams: 0
    RcvbufErrors: 0
    SndbufErrors: 0
error parsing /proc/net/snmp: Success



--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663
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