Let me try a wild guess, it looks like buffer fragmentation related to network/ssh/openZFS. The software might desperately try to defragment many small spaces and that would explain the 100% CPU load during the low speed transfers. If the defragmentation happens in the kernel, it also might explain, why the CPU frequency is not increased. Note that only Conky records that 100% CPU load, while the task manager does not notice anything and has the load below 30% all the time.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1969281 Title: Very slow reception of incremental OpenZFS backup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1969281/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
