NAME
spray — spray packets
SYNOPSIS
/usr/sbin/spray
[-c
count]
[-d
delay]
[-l
length]
[-t
nettype]
host
DESCRIPTION
spray
sends a one-way stream of packets to
host
using RPC, then reports how many were received by
host
and what the transfer rate was.
The host name can be either a name or an internet address.
spray
is not useful as a networking benchmark, as it uses unreliable
connectionless transports, UDP, for example.
spray
can report a large number of packets dropped when the drops were
caused by
spray
sending packets faster than they can be buffered locally, that is,
before the packets get to the network medium.
Options
spray
recognizes the following options and command-line arguments:
- -c count
Specify how many packets to send.
The default value of
count
is the number of packets required
to make the total stream size 100000 bytes.
- -d delay
Specify how many microseconds to pause between sending each packet.
The default is 0.
- -l length
Specify the number of bytes in the Ethernet packet that holds the RPC
call message.
Since the data is encoded using XDR, and XDR only deals
with 32 bit quantities, not all values of
length
are possible, and
spray
rounds up to the nearest possible value.
When
length
is greater than 1514, then the RPC call can no longer be encapsulated
in one Ethernet packet.
In that case, the
length
field no longer has a simple correspondence to the Ethernet packet size.
The default value of
length
is 86 bytes, the size of the RPC and UDP headers.
- -t nettype
Specify class of transports.
Defaults to
netpath.
See
rpc(3N)
for a description of supported classes.
AUTHOR
spray
was developed by Sun Microsystems, Inc.
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