Sponsored Content
Homework and Emergencies Emergency UNIX and Linux Support using multiple iperf instances for performance testing Post 302483847 by elemental on Tuesday 28th of December 2010 04:02:17 PM
Old 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.
 

7 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

multiple instances of syslogd - is it possible?

I would like to start up multiple instances of syslog daemon. I am having a little difficulty. Is this at all possible? I have separate syslog.conf1.... syslog.conf5 files. I have linked the daemon to separate files syslogd1 ... syslogd5 I have arranged the rcd.2 start/stop scripts for... (9 Replies)
Discussion started by: Gary Dunn
9 Replies

2. AIX

Performance testing on AIX

I'm doing performance testing for one application which works on AIX. But I don't know which performance parameters of memory need to be collected. Now, I just know very few: 1. page in 2. page out 3. fre They are all collected by "vmstat" command. I want to know, except for above... (2 Replies)
Discussion started by: adasong
2 Replies

3. Web Development

Suggested tool / approach for performance testing

What is a good approach for a performance testing tool suite for web applications? I am specifically interested in tools that execute a certain set of tasks well as opposed to tuning high traffic sites. In other words, a profiler would be a good idea to have, although I understand these tools are... (4 Replies)
Discussion started by: figaro
4 Replies

4. Linux

Doubt about programs for testing Linux performance

Hello friends, I'm working on a Thesis and right now I'm in a phase of comparing a Linux vs Windows performance in similar situations on the same machine. I'm asking here because I would like help on this, since I've always worked in Linux as an Administrator and a user, never as a... (6 Replies)
Discussion started by: lzcool
6 Replies

5. IP Networking

using multiple iperf instances for performance testing

Hello all! I have the need to performance-test a MPLS switch, I was thinking of using iperf to accomplish the task. I had in mind using a linux box with a Gigabit interface connected to a L2 switch on a 802.1Q trunk. In the interface I would create 20 VLANs with 20 different IP subnets. ... (0 Replies)
Discussion started by: ppucci
0 Replies

6. Programming

Control multiple program instances - open multiple files problem

Hello. This shouldn't be an unusual problem, but I cannot find anything about it at google or at other search machine. So, I've made an application using C++ and QtCreator. I 've made a new mime type for application's project files. My system (ubuntu 10.10), when I right click a file and I... (3 Replies)
Discussion started by: hakermania
3 Replies

7. UNIX for Dummies Questions & Answers

Unix Performance testing - training content

Hi Everyone, My company is involved in performing performance testing and now they want to perform couple of training related with executing those tests on the servers based on Unix sytems. And I have to provide them draft of the content for those trainings. I think this kind of training... (2 Replies)
Discussion started by: Bartuss
2 Replies
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)
All times are GMT -4. The time now is 07:24 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy