Re: What Does IPerf Actually Measure ?
On Thu, 7 Oct 2004, Anderson Jeff-CJA015 wrote:
> I looked through the web site and can't find exactly how throughput is measured, specifically at what layer ?
>
> Is it looking at L2 throughput couting IP, UDP/TCP overheads along with Ethernet.
>
> Or is it only couting L4 payload bytes and discounting the TCP-UDP/IP (28 - 40 octets) overheads ?
iperf is a regular "application", using BSD sockets (looking at the
long list of operating systems supported, you can hardly expect
anything lower :-)
It is thus measuring the throughput of BSD sockets, because it just
can't measure anything else. You can find lengthy discussions about
this in the archive.
http://archive.ncsa.uiuc.edu/lists/iperf-users/
This archive does not feature a search engine but you can easily
search it using google's advanced search features.
Look first at July and August 2004.
PS to list admins: could you quickly set up a "search with google"
page like this one: http://www.catb.org/~esr/jargon/jargoogle.html ?
Cheers,
Marc.