Free measuring available bandwidth software for linux

Measuring Buffer 20090628 provides you with a perfect and enhanced version of buffer which features display of throughput, network support, memory-mapped file I/O for huge buffers and multithreading. This will be your excellent choice.

bandwidth project is an artificial benchmark for measuring memory bandwidth, useful for identifying a computers weak areas.
It tests several types of memory:
- Main memory read accesses
- Main memory write accesses
- Level 2 cache read accesses
- Level 2 cache write accesses
- Framebuffer read accesses
- Framebuffer write accesses
- String library routines
Enhancements:
- 64-bit support has been added.

ADSL Bandwidth Management HOWTO project describes how to manage outbound traffic on an ADSL modem.
Emphasis is placed on lowering the latency for interactive traffic even when the upstream and/or downstream bandwidth is fully saturated.
The purpose of this document is to suggest a way to manage outbound traffic on an ADSL (or cable modem) connection to the Internet. The problem is that many ADSL lines are limited in the neighborhood of 128kbps for upstream data transfer.
Aggravating this problem is the packet queue in the ADSL modem which can take 2 to 3 seconds to empty when full. Together this means that when the upstream bandwidth is fully saturated it can take up to 3 seconds for any other packets to get out to the Internet.
This can cripple interactive applications such as telnet and multi-player games.
Enhancements:
- Added links section

okons bandwidth manager (aka. obwman) is a simple tool for efficient traffic shaping. okons bandwidth manager aims to give a fair share of bandwidth to each host while imposing particular rules.
Configuration of obwman is straightforward and it is almost maintenance free., as it detects automatically hosts on the network. Obwman prioritises traffic of HTTP, TCP ACK and TCP initiate session.
Main features:
- fair allocation of bandwidth
- enforce minimum and maximum speed
- support for aggregated links (uplink agnostic)
- automatic detection of hosts on the network
- support for Squid proxy
- free (available under GNU General Public License ).

bandwidth monitor is a small application which polls /proc/net/dev for the byte counts for a given network device , and calculates the RX and TX bandwidths. Originally a shell script, then a Perl script, now rewritten in C so that it can easily be used on embedded devices like the Linksys WRT54G as well as.

This program started as a shell script that I ran on my home-brew firewall wireless router (Linux, of course, on a 486/66) to keep track of my incoming and outgoing bandwidth. This let me know that I was getting the bandwidth that I paid for, and it also helped me keep an eye on the throttling of bulk traffic so that I didnt choke out my interactive sessions. Of course, that was before I had QOS.

The program is probably tied to Linux, since it grabs the byte counts for the requested interface right from /proc/net/dev. It could pretty easily be modified to grab the same information from the output of /sbin/ifconfig, but that would waste resources to spawn a new process to parse the /proc/net/dev file and regurgitate it to us. Also, I havent bothered to look at how uniform the output of the byte counts from /sbin/ifconfig is on other operating systems.

As a side note, the C version also uses nanosleep() and gettimeofday() to get more accurate polling intervals and track the overall time (since sleep(), usleep(), nanosleep(), et. al. only guaruntee to wait at least as long as you request, but do not guaruntee that it wont be possibly much longer...) So, if you were interested in porting it, youd have to make sure that nanosleep() and gettimeofday() were also available, or lose the resolution of the time used in bandwidth calculations.

BUILDING

$ gcc -O3 -o bandwidth_monitor bandwidth_monitor.c

Text::NSP::Measures::2D::Fisher::twotailed is a Perl module implementation of the two-sided Fishers exact test.

SYNOPSIS

Basic Usage

use Text::NSP::Measures::2D::Fisher::twotailed;

my $npp = 60; my $n1p = 20; my $np1 = 20; my $n11 = 10;

$twotailed_value = calculateStatistic( n11=>$n11,
n1p=>$n1p,
np1=>$np1,
npp=>$npp);

if( ($errorCode = getErrorCode()))
{
print STDERR $errorCode." - ".getErrorMessage();
}
else
{
print getStatisticName."value for bigram is ".$twotailed_value;
}