Determining typing latency Post: 302539422

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Top Forums UNIX for Advanced & Expert Users Determining typing latency Post 302539422 by mirni on Sunday 17th of July 2011 11:14:27 AM

07-17-2011

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Is there a particular reason you are after a relative metric? Why not look at absolute delay?
I mean, as you said before, the delay on a local box is super small, practically zero. If you'll try to calculate a quotient (remote delay)/(local delay), you'll get huge numbers, and very large inaccuracy.
An absolute measure of the delay would be a much more accurate one, in terms of numerical stability.
However, I believe the ping echoes are given lower priority than let's say, the data being transferred through ssh -X session, so ping need not be the same as your text editing delay, nevertheless, under normal network and processing load, it should come pretty close.

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varnetload

varnetload(8)					    Tool to create reproducable network traffic 				     varnetload(8)

NAME

       varnetload - tool to create reproducable network traffic

SYNOPSIS

       varnetload [-d delay] [-t time to run] [-u url]

DESCRIPTION

       varnetload is a simple python script to create reproducable sustained network traffic.

       In  order to use it effectively, you need to have an HTTP server present in your local LAN where you can put files. Upload a large HTML (or
       any other kind of file) to the HTTP server. Use the -u option of the script to point to that URL. Play with the delay option  to  vary  the
       load put on your network.

       delay  Sets  delay between individual downloads in miliseconds. Default value is 1000. But you my find values range from 0 to 500 more use-
	      ful.

       time to run
	      Sets total run time in seconds. Default value is 60.

       url    Sets downloaded resource. Default is http://myhost.mydomain/index.html.

SEE ALSO

       tuned(8) diskdevstat(8) netdevstat(8) scomes(8)

AUTHOR

       Written by Phil Knirsch <pknirsch@redhat.com>.

REPORTING BUGS

       Report bugs to <pknirsch@redhat.com>.

Phil Knirsch							    13 Jan 2011 						     varnetload(8)

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