On Thu, Jul 27, 2023 at 11:28 PM Michael Loftis <mloftis@xxxxxxxxx> wrote: > On Thu, Jul 27, 2023 at 3:23 PM Roland Mainz <roland.mainz@xxxxxxxxxxx> wrote: > > Before I start writing one myself... > > ... did anyone ever wrote a tool to measure the latency of a ssh > > connection, a la "ping" ? > > That gets...really complicated... Because what exactly do you want to > measure? We want to profile some kind of ancient self-made RPC system, and therefore we need to measure the time starting from writing a string into ssh stdin, get on the remote side /bin/cat to send it back, and then stop the clock when the string comes out of ssh's stdout. And that in a form of endless loop, for around one hour (just to be sure that the overhead of the ssh protocol negotiation details and network noise don't ruin the measurements...). Or short: Round-trip latency of data passed to a remote /bin/cat. And that for every possible ssh -c cipher ---- Bye, Roland -- __ . . __ (o.\ \/ /.o) roland.mainz@xxxxxxxxxxx \__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer /O /==\ O\ TEL +49 641 3992797 (;O/ \/ \O;) _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
