On Thu, 10 Aug 2023, Cedric Blancher wrote: > Good morning! > > We're experiencing rather very bad latency spikes on busy Linux > systems, for example if one machine is the jumphost (ssh -J) for a few > hundred connections, while at the same time handles CPU intensive > tasks. > > Would RT/Linux SCHED_FIXED or SCHED_RR be of help in such a case, e.g. > put all ssh processes into the SCHED_FIXED scheduling class, with a > priority higher than the non-interactive compute processes? If the problem is load caused by the ssh connections then a different scheduling class isn't likely to help. > Also, do I interpret it correctly that each forwarded TCP connection > has its own process?! Usually yes. If you're using connection multiplexing (ControlPath/ ControlMaster/ControlPersist) then connections from the same user through the same jump host can be shared. -d _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
