NAME
tcpspray - print average throughput for a tcp connection
SYNOPSIS
tcpspray [ -v ] [ -e ] [ -h ] [ -b blksize ] [ -n nblks ]
[ -f filename ] hostname
DESCRIPTION
tcpspray sends data to either the discard or echo TCP service on the
specified host and prints the average throughput.
OPTIONS
-v Prints a dot for each block sent. Will also print a
backspace for each block received in echo mode. Note:
the I/O required for this option will affect the
throughput rates.
-e Use the TCP echo service instead of discard (the
default) and print throughput rates for both
transmission and reception.
-h Print a usage description.
-b blksize Sets the size of a block (the internal buffer) in bytes.
Defaults to 1024.
-n nblks Sets the number of blocks to transfer. Defaults to 100.
-f filename Copy the contents of the specified file into the
internal buffer (sized by -b option). The buffer is
zeroed by default. If the file is larger than the
buffer, only the first blksize bytes will be used. If
the file is smaller than the buffer, the remaining bytes
are zeroed.
This option is useful in determining the relationship of
the data transferred to throughput. E.g., if data
compression is used on any of the intermediate links
comprising the TCP connection, preloading the buffer
with a text file will produce greater throughput than
with a file that has already been compressed.
-d delay Sets the time in microseconds to wait between successive
buffer transmissions. The default is no delay.
SEE ALSO
ping(8), spray(8)
AUTHOR
Greg Christy (gmc@quotron.com)
23 October 1991