MAN page from RedHat Other ttcp-1.4-1.i386.rpm
NETSNOOP
Section: Misc. Reference Manual Pages (1M)
Updated: local
Index NAME
ttcp - test TCP and UDP performance
SYNOPSIS
ttcp -t[
-lbuflen][
-s][
-nnumbufs][
-pport][
-u][
-D][
-L][
-Aalign][
-Ooffset][
-v]host[
<in
]ttcp -r[
-lbuflen][
-s][
-pport][
-B][
-Aalign][
-Ooffset][
-u][
-v][
>out
] DESCRIPTION
Ttcptimes the transmission and reception of data between two systems using the UDP or TCP protocols.It differs from common "blast" tests, which tend to measure the remote
inetdas much as the network performance, and which usually do not allow measurements at the remote end of a UDP transmission.
Ttcp.cshould be compiled for both ends of the path to be test. It usessocketsand is easy to port to most machines based on 4.3BSD.
The transmitter should be started with -tafter the receiver has been started with -r.Test lasting at least tens of seconds should be used to obtain accuratemeasurements.Graphical presentations of throughput versus buffer size forbuffers ranging from tens of bytes to several "pages" can illuminatebottlenecks.
Options
- -t
- Transmit mode.
- -r
- Receive mode.
- -u
- Use UDP instead of TCP.
- -llength
- Length of buffers in bytes (default 8192).
- -nnumbufs
- Number of source buffers transmitted (default 2048).
- -pport
- Port number to send to or listen on (default 5001).
- -D
- If transmitting using TCP, do not buffer data when sending(sets the TCP_NODELAY socket option).
- -s
- If transmitting, do not source a data pattern to network;use stdininstead.If receiving, do not sink or discard, but print all data tostdout.
- -B
- When receiving and using the -s option, only output full blocks, using the block size specified by -l.This option is useful for programs that require complete blocks, like tar(1).
- -Aalign
- Align the start of buffers to this modulus (default 16384).
- -Ooffset
- Align the start of buffers to this offset (default 0).For example, "-A8192 -O1" causes buffers to start at the second byteof an 8192-byte page.
- -v
- Verbose: print more statistics.
- -d
- Set the SO_DEBUG socket option.
Ttcpwas written by Mike Muuss at the Ballistics Research Laboratory.It has been modified at Silicon Graphics as recorded inttcp.c.
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- Options
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