12-28-2010
using multiple iperf instances
Hi ppucci,
Multiple iperf instances would work for what you want. I'm assuming that you're using VLAN sub-interfaces (e.g. eth0.1234) since you mentioned 802.1q trunking to your interface.
On the recieve (server) side you can run a single iperf instances that will bind to all interfaces (this is the normal 'iperf -s' behavior), or exec multiple iperf servers, each using -B to bind to a specific interface (for finer-grained logging and control) as pileofrogs mentioned.
To state the obvious: your 20 iperf streams will each be ~50Mbit; This may be fine for switch testing, but mentioning in case your trying to e.g. saturate a multiple port Gigabit switch fabric.
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LEARN ABOUT XFREE86
x11perfcomp
X11PERFCOMP(1) General Commands Manual X11PERFCOMP(1)
NAME
x11perfcomp - X11 server performance comparison program
SYNTAX
x11perfcomp [ -r | -ro ] [ -l label_file ] files
DESCRIPTION
The x11perfcomp program merges the output of several x11perf(1) runs into a nice tabular format. It takes the results in each file, fills
in any missing test results if necessary, and for each test shows the objects/second rate of each server. If invoked with the -r or -ro
options, it shows the relative performance of each server to the first server.
Normally, x11perfcomp uses the first file specified to determine which specific tests it should report on. Some (non-DEC :) servers may
fail to perform all tests. In this case, x11perfcomp automatically substitutes in a rate of 0.0 objects/second. Since the first file
determines which tests to report on, this file must contain a superset of the tests reported in the other files, else x11perfcomp will
fail.
You can provide an explicit list of tests to report on by using the -l switch to specify a file of labels. You can create a label file by
using the -label option in x11perf.
OPTIONS
x11perfcomp accepts the options listed below:
-r Specifies that the output should also include relative server performance.
-ro Specifies that the output should include only relative server performance.
-l label_file Specifies a label file to use.
X DEFAULTS
There are no X defaults used by this program.
SEE ALSO
X(7), x11perf(1)
AUTHORS
Mark Moraes wrote the original scripts to compare servers.
Joel McCormack just munged them together a bit.
XFree86 Version 4.7.0 X11PERFCOMP(1)