GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
LAT_TCP(8) LMBENCH LAT_TCP(8)

lat_tcp - measure interprocess communication latency via TCP/IP

lat_tcp -s

lat_tcp [ -m <message size> ] [ -P <parallelism> ] [ -W <warmups> ] [ -N <repetitions> ] hostname

lat_tcp -S hostname

lat_tcp is a client/server program that measures interprocess communication latencies. The benchmark passes a message back and forth between the two processes (this sort of benchmark is frequently referred to as a ``hot potato'' benchmark). No other work is done in the processes.

lat_tcp has three forms of usage: as a server (-s), as a client (lat_tcp localhost), and as a shutdown (lat_tcp -S localhost).

The reported time is in microseconds per round trip and includes the total time, i.e., the context switching overhead is includeded. Output format is like so

TCP latency using localhost: 700 microseconds

Funding for the development of this tool was provided by Sun Microsystems Computer Corporation.

lmbench(8), lat_fcntl(8), lat_fifo(8), lat_tcp(8), lat_udp(8), lat_unix(8).

Carl Staelin and Larry McVoy

Comments, suggestions, and bug reports are always welcome.

$Date$ (c)1994 Larry McVoy

Search for    or go to Top of page |  Section 8 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.