Re: [Iperf-users] Bandwidth: what am I measuring?
Don't forget to test responsiveness and latency too. Bandwidth is only one metric. Lots of apps are being slowed per latency not throughput. Think of latency as the limiting speed of causality which is mostly independent of channel capacity. The new bounceback feature will be released in 2.1.9. It's currently in the 2.1.9-rc (release candidate) Bob On Sun, Feb 19, 2023 at 2:47 PM Pieter Hulshoff wrote: > On 19-02-2023 17:39, Bob McMahon wrote: > > It's end to end at the socket layer, writes and reads. So it's the > transport layer payload. The transport layer cab be either TCP or UDP with > iperf 2. Iperf 3 also carries SCP. > > The lower layers, e.g. IP & ethernet frames are not part of the > calculation. Those don't typically go to socket or app layer. > > https://man7.org/linux/man-pages/man2/socket.2.html > > > Thank you; that should help me to interpret the bandwidth numbers I get. > > Kind regards, > > Pieter Hulshoff > > -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you received this e-mail in error, please return the e-mail to the sender, delete it from your computer, and destroy any printed copy of it. smime.p7s Description: S/MIME Cryptographic Signature ___ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
Re: [Iperf-users] Bandwidth: what am I measuring?
On 19-02-2023 17:39, Bob McMahon wrote: It's end to end at the socket layer, writes and reads. So it's the transport layer payload. The transport layer cab be either TCP or UDP with iperf 2. Iperf 3 also carries SCP. The lower layers, e.g. IP & ethernet frames are not part of the calculation. Those don't typically go to socket or app layer. https://man7.org/linux/man-pages/man2/socket.2.html Thank you; that should help me to interpret the bandwidth numbers I get. Kind regards, Pieter Hulshoff ___ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
Re: [Iperf-users] Bandwidth: what am I measuring?
It's end to end at the socket layer, writes and reads. So it's the transport layer payload. The transport layer cab be either TCP or UDP with iperf 2. Iperf 3 also carries SCP. The lower layers, e.g. IP & ethernet frames are not part of the calculation. Those don't typically go to socket or app layer. https://man7.org/linux/man-pages/man2/socket.2.html Bob On Sun, Feb 19, 2023, 5:50 AM Pieter Hulshoff wrote: > Hello all, > > When I'm running iperf bandwidth tests, what exactly am I configuring > (-b) / measuring (displayed results)? > UDP/TCP payload? > IP payload (UDP/TCP data)? > Ethernet payload (IP data)? > Ethernet data? > > Kind regards, > > Pieter Hulshoff > > > > ___ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users > -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you received this e-mail in error, please return the e-mail to the sender, delete it from your computer, and destroy any printed copy of it. smime.p7s Description: S/MIME Cryptographic Signature ___ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
Re: [Iperf-users] Bandwidth: what am I measuring?
Hi, Not sure, but I think this is the UDP/TCP payload. Regards. Sébastien. Le 19/02/2023 à 14:23, Pieter Hulshoff a écrit : Hello all, When I'm running iperf bandwidth tests, what exactly am I configuring (-b) / measuring (displayed results)? UDP/TCP payload? IP payload (UDP/TCP data)? Ethernet payload (IP data)? Ethernet data? Kind regards, Pieter Hulshoff ___ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users ___ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
[Iperf-users] Bandwidth: what am I measuring?
Hello all, When I'm running iperf bandwidth tests, what exactly am I configuring (-b) / measuring (displayed results)? UDP/TCP payload? IP payload (UDP/TCP data)? Ethernet payload (IP data)? Ethernet data? Kind regards, Pieter Hulshoff ___ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
