weblatency.d(1) USER COMMANDS weblatency.d(1)
NAME
weblatency.d - website latency statistics. Uses DTrace.
SYNOPSIS
weblatency.d
DESCRIPTION
This prints statistics for hostnames that browers have set GET requests
for, in particular latency by hostname.
The latency measured is from the browser sending the GET request to
when the browser begins to recieve the response. It is an overall
response time for the client, and encompasses connection speed delays,
DNS lookups, proxy delays, and web server response time.
This is written as an experimental tool, and may not work at all with
your browser.
Since this uses DTrace, only users with root privileges can run this
command.
EXAMPLES
Print report after Ctrl-C is hit,
# weblatency.d
FIELDS
HOST hostname from URL
NUM number of GETs
AVGTIME(ms)
Average time for response, ms
MAXTIME(ms)
Maximum time for response, ms
NOTES
See the source code for the "BROWSER" variable, which sets the browser
to trace (currently set to "mozilla-bin").
IDEA
Bryan Cantrill (who wrote an elegant version for Sol 10 update 1)
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs direc-
tory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
weblatency.d will sample until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO
dtrace(1M)
version 0.60 Nov 30, 2005 weblatency.d(1)
Mac OS X 10.6 - Generated Thu Sep 17 20:09:31 CDT 2009