Investigate busy ceph-msgr worker thread

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Hi,

We have a cephfs linux kernel (5.4.0-53-generic) workload (rsync) that seems to be limited by a single ceph-msgr thread (doing close to 100% cpu). We would like to investigate what this thread is so busy with. What would be the easiest way to do this? On a related note: what would be the best way to scale cephfs client performance for a single process (if at all possible)?

Thanks for any pointers.

Gr. Stefan



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