netperfmeter(8)

NAME

netperfmeter -- Network Performance Meter

SYNOPSIS

netperfmeter [Port]
netperfmeter [Destination:Port] -local=Address[,Address,...]
             -runtime=Seconds -config=Name -scalar=Name -vector=Name
             -activenodename=Description -passivenodename=Description
             -quiet -verbose -verbosity=Level -tcp -udp -sctp -dccp
             [FLOWSPEC] [...]

DESCRIPTION

netperfmeter is a network performance meter for the UDP, TCP, SCTP and DCCP transport protocols. It simultaneously transmits bidirectional
flows to an endpoint and measures the resulting flow bandwidths. The
results are written as vector and scalar files.

ARGUMENTS

The following arguments have to be provided:

Port The port number for the passive side's data socket. The port num: ber of the control socket will be port+1. Specifying a port number turns netperfmeter in passive mode, i.e. it will wait for
incoming connections.
Destination:Port: Specifies the destination endpoint to connect to. This will turn netperfmeter in active mode, i.e. it will connect to the specified remote endpoint.
local=Address[,Address,...]: Specifies address(es) of the local endpoint. For TCP, UDP and
DCCP, only the first address is used!
runtime: Specifies the measurement runtime in seconds. After the given
time span, netperfmeter will finish the measurement.
config=Name: Specifies the name of the configuration file to write. Default is output.config.
vector=Name: Specifies the name pattern of the vector files to write. If the
suffix of this name is .bz2, the file will be BZip2-compressed on the fly. The vector name is automatically extended to name the
flow vector files by adding -<active|passive>-<flow_id>-<stream_id> before the suffix. Default is vector.vec.bz2, hence the name of the vector file for flow 5, stream 2 on the passive node will be vector-passive-00000005-0002.vec.bz2.
scalar=Name: Specifies the name pattern of the scalar files to write. If the
suffix of this name is .bz2, the file will be BZip2-compressed on the fly. The scalar name is automatically extended to name the
flow scalar files by adding -<active|passive>-<flow_id>-<stream_id> before the suffix. Default is
scalar.vec.bz2, hence the name of the scalar file for flow 5,
stream 2 on the passive node will be scalar-passive-00000005-0002.vec.bz2.
activenodename=Description: Sets a textual description of the active node (e.g. Client).
passivenodename=Description: Sets a textual description of the passive node (e.g. Server).
quiet Reduces verbosity of log output. May be specified multiple times.
verbose: Increases verbosity of log output. May be specified multiple
times.
verbosity=Level: Sets the verbosity of the log output to a given level, from 1
(lowest) to 6 (highest).
sctp Establish a new SCTP association. The streams of this association: must be specified by one or more FLOWSPEC specifications as following parameters.
tcp Establish a new TCP connection. The flow of this connection must: be specified by a FLOWSPEC specification as following parameter.
udp Establish a new UDP connection. The flow of this connection must: be specified by a FLOWSPEC specification as following parameter.
dccp Establish a new DCCP connection. The flow of this connection must: be specified by a FLOWSPEC specification as following parameter. Note, that DCCP is not available on all platforms yet.
FLOWSPEC: Specifies a new flow. The format is: outgoing_frame_rate:outgoing_frame_size:incoming_frame_size:incoming_frame_rate:option:...; outgoing_frame_rate
The frame rate of the outgoing transfer (i.e. active node to passive node). If set to const0, the sender will be
saturarted, i.e. it will try to send as much as possible.
outgoing_frame_size: The frame size of the outgoing transfer (i.e. active node to passive node). If set to const0, there will be *no*
data transmission in this direction.
incoming_frame_rate: The frame rate of the incoming transfer (i.e. passive
node to active node). See outgoing_frame_rate for
details.
incoming_frame_size: The frame size of the incoming transfer (i.e. active node to passive node). See outgoing_frame_size for details.
Possible options:: id=Flow Identifier
Sets an ID number for the flow. The IDs within a measurement must be unique!
description=Description: Sets a textual description of the flow (e.g.
HTTP-Flow). Do not use spaces in the description!
maxmsgsize=Bytes: Splits frames into messages of at most the given number of bytes. Messages may not exceed 65535
bytes.
defragtimeout=Milliseconds: Messages not received within this timeout after
the last successfully received message are
accounted as lost. NOTE: this also happens if the transport protocol is reliable and the message is actually received later!
unordered=Fraction: Specifies the fraction of the messages that will be sent in unordered mode (SCTP only).
ordered=Fraction: Specifies the fraction of the messages that will be sent in ordered mode (SCTP only).
reliable=Fraction: Specifies the fraction of the messages that will be sent in reliable mode (SCTP only).
unreliable=Fraction: Specifies the fraction of the messages that will be sent in unreliable mode (SCTP only).
rtx_timeout=Milliseconds: Sets the retransmission timeout for unreliable
messages (SCTP only; not available on all platforms!)
rtx_trials=Trials: Sets the retransmission trials for unreliable
messages (SCTP only; not available on all platforms!)
rcvbuf=Bytes: Sets the receiver buffer size to the given number of bytes.
sndbuf=Bytes: Sets the sender buffer size to the given number
of bytes.
onoff=t1,t2,...: A list of time stamps when the flow should be
activated or deactivated. If onoff is given, the flow is off at startup. At t1, it will be turned on; at t2, it will be turned off, etc.. Time
stamps can be given as absolute values (e.g.
onoff=0,10,30 - to turn on at t=0, turn off at
t=10 and turn on again at t=30 until end of measurement) or relative values (e.g. on=10,+30,+60 - to turn on at t=10, turn off at t=40 and turn
on again at t=100 until end of measurement).

EXAMPLES

Some netperfmeter usage examples:

netperfmeter 9000: Start in passive mode, i.e. accepting connections, on port 9000.
netperfmeter 172.16.255.254:9000 -vector=output.vec.bz2: -scalar=output.sca.bz2 -sctp
const5:exp1000:const3:exp500:description="Alpha":onoff=+10
const5:exp1000:const3:exp500:description="Beta":onoff=+30 -tcp
const5:exp1000:const3:exp500:description="Gamma":onoff=+60
-runtime=300
Start in active mode, i.e. establish connection to
172.16.255.254, port 9000. Frames will be segmented into messages of up to 4096 bytes. Write vectors to output.vec.bz2
(BZip2-compressed). Write scalars to output.sca.bz2 (BZip2-compressed). Establish SCTP association. At t=10s, start flow
"Alpha" as first stream of this association, using a frame rate
of 5 (constant) and average frame size of 1000 bytes (negative
exponential distribution) for the outgoing data and a frame rate of 3 (constant) and average frame size of 500 bytes (negative
exponential distribution) for the incoming data. At t=30s, start flow "Beta" as second stream on the SCTP association (same parameters as flow "Alpha"). Start TCP connection. At t=60s, start
flow "Gamma" over the TCP connection (same parameters as flow
"Alpha"). At t=300s, stop the measurement.

AUTHORS

Thomas Dreibholz
http://www.iem.uni-due.de/~dreibh/netperfmeter
mailto://dreibh@iem.uni-due.de

docs.sk

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