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Re: How to monitor internet speed in real time?
by matija (Priest) on Oct 05, 2004 at 12:01 UTC
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What is "internet speed" to you? Is it derived as
distance_flown_by_the_internet
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time_when_it_lands-time_when_I_threw_it
Or is it the speed of data through your internet interface?
If the later, I use the following script as an input to MRTG graph:
open(INP,"</proc/net/dev") || die "Can not open /proc/net/dev: $!";
while (<INP>) {
s/eth0:(\d)/eth0: $1/;
@a=split;
print "$a[1]\n$a[9]\n" if ($a[0]=~s/eth0://);
}
This, of course, is highly system dependent... | [reply]
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Re: How to monitor internet speed in real time?
by jaco (Pilgrim) on Oct 05, 2004 at 13:49 UTC
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You have to be careful using the first equation matija
pointed out on things such as dialup modems. One of
the things people seem to forget about is data compression
over PPP or even gzip'd browser compression. So if you
download a 200k text file it'll appear like you're getting
168Kbs on a dial up modem, because the NAS gear
compresses the bejesus out of it.
I say use a jpeg or already gziped file on a server and
Time::HiRes for your time specs. Just make sure the
data size you claim to be downloading is the actual amount of
data that came across the pipe. | [reply] |
Re: How to monitor internet speed in real time?
by ambrus (Abbot) on Oct 05, 2004 at 17:34 UTC
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Your question is not really exact.
Are you trying to monitor internet traffic of a certain
machine from the machine itself, or from a different machine?
Do you want to mesure all network usage or only that
to certain destinations, protocols, ports or programs?
And most importantly, what OS are you using?
Anyway, here's some starting point for linux.
In linux, there is a counter that counts the total
incoming and outgoing bytes on a network interface.
You access this counter with the ifconfig
program, or directly from /proc/net/dev (this is
linux 2.4.25, the /proc interface might be different in other
versions).
If you read that counter every few seconds, you can see how
much data comes in and out.
If you need more detailed statistics, you have to use iptables.
Every iptables rule has a byte counter similar to that above.
To read this, you run iptables -L -nvx or figure out
how iptables gets the data from the kernel.
The drawback of this is that iptables requires root permissions,
while netstat ifconfig (Update: I meant to say ifconfig here, just as above) does not normally.
Update: see also Re: measuring IN/OUT traffic on your computer which is about the same problem but has code.
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http://speedcheck2.optonline.net/speedcheck/speedcheck.html This link shows first roadmap to what I want to implement. In disassembly I find out that it uses javascript and uses Microsoft API. I am not clear about the algorithm implemented. But sure it checks the rate of packets flow. What I really want to do is to somehow monitor the performance of my Cable Operator and store the information in a database. I am able to execute netstat, but trying hard to find a way to use those information contained in the packets. Please enlighten me in this area. And it is my personal belief or you can say it a jingoism that Perl is a better solution provider then that idiotically slow java and javascript
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I couldn't view the webpage you've given, so I don't know if it mesures the network usage of your computer or only the speed of the connection of your computer and their server (which can be a good approximation of your internet access bandwidth if you're not downloading anything the same time you're running the speedcheck).
Netstat is not relevant here. I meant to say ifconfig from the start, but I was tired and said netstat instead in the last paragraph.
About ifconfig. On my system it prints a line like this about the eth0 interface.
RX bytes:466213 (455.2 Kb) TX bytes:40233 (39.2 Kb)
(I've just started my machine so that's why the numbers are so small.)
I remember that some older versions of ifconfig does not print this info, probably because this feature was not available in older (2.2) kernels.
The command corresponding to ifconfig in windows is ipconfig but I don't know whether it prints this info.
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Re: How to monitor internet speed in real time?
by chanio (Priest) on Oct 06, 2004 at 05:47 UTC
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Hey,can you tell me something in perl. I don't know java enough.
But I must tell you, you hit the bull's eye
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Well, the JAVA applet is an example to show you that JAVA applets work from the users side of all.
So, your server creates the page that contains a JAVA applet (you might find it from the plenty of JAVA stuff in the web). And then the user loads that html page and the applet starts working connected with your server (just sending pings or some other thing, don't know).
From the applet's JAVA side I could inform you just what you need to know: that it works with some parameters that your server writes in the html page. The parameters that the applet needs (as any perl script). Then, with this parameters it starts working when the user loads the html page. JAVA works inside a 'sandbox' that doesn't compromise any other part of the users machine. So it is safe and should provide you with what you need at the server side.
Hope that it helps!
.{\('v')/}
_`(___)' __________________________
Wherever I lay my KNOPPIX disk, a new FREE LINUX nation could be established.
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