Edgar Fuß <ef%math.uni-bonn.de@localhost> writes: > I'm just scp-ing a multi-gigabyte file from one NetBSD-8 machine to another, > and get a whopping 10MB/s throughput. > Interfaces are wm, 1000BaseT (says ifconfig and the switch), connected to > the same (enterprise) switch. > Discs are ~20% busy on the receiving end, less on the sending end. > ssh/sshd are at ~20% CPU max, CPUs are 50% (sending side, which does multiple > other things)/80% (receiving side, which does nothing) idle. That's 80 Mb/s. 1. install iperf3 and run that. That takes ssh and disks out of the equation. Maybe try iperf2 also. 2. run netstat -s (on both machines) before and after the test, and diff them 3. receive cpu usage seems high. watch it while iperf is running. could be crypto bound in ssh.
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