Hello Alfredo, thank you for your response. I think for TCP (and I think SCTP) you are right. But I tried this for UDP with the "-i 1" option and I get reports to every second. I sniffer the packets from and to the server via wireshark and there is only one packet after 10 sec from server to the client. How is it there possible that the Client can calculate the correct bandwidth every second, because it get no ACKs or something else?
Regards Frank > -----Ursprüngliche Nachricht----- > Von: "Alfredo Alcantara" <alfredoealcant...@gmail.com> > Gesendet: 30.10.09 21:27:56 > An: Frank Schuster <frank.schuste...@web.de> > Betreff: Re: [Iperf-users] How iperf works? Hi Frank, this is what i think > > iperf through this command iperf -c x.x.x.x > is sendind tcp packets > tcp packets always receive ACK's from the server so that's is how > he knows that the data is reaching his destiny > the throughput is being calculate by the average of > throughput in every sec if you type > iperf -c x.x.x.x -i 1 you can see what i'm talking > best of regard and hoping this solve the problem > > Alfredo Alcantara > > 2009/10/29 Frank Schuster <frank.schuste...@web.de> > Hello, > > I want know how iperf works? > I know it based on a client-server-modell but what I don't know is, > how it calculate the throughput? > For example: > The client send 10 secs data to the server - how the client know the > throughput? > He get no packages from the server, doesn't he? - In spite of the > ACKs, or use he the acks? > > I don't find any information about this in the web, perhaps anybody > can help me? > > Best Regards > Frank > > ______________________________________________________ > GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! > Jetzt freischalten unter http://movieflat.web.de > > ---------------------------------------------------------------------- > -------- > Come build with us! The BlackBerry(R) Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart > your > developing skills, take BlackBerry mobile applications to market and > stay > ahead of the curve. Join us from November 9 - 12, 2009. Register now! > http://p.sf.net/sfu/devconference > _______________________________________________ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users > > > -- MfG Frank Schuster ______________________________________________________ GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
