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15eaf2fd8e
Don't let perftune.py print false alarm error message when we calculate a compute CPU set for tuning modes. This may happen when we calculate a CPU set for non-MQ tuning modes on small systems on which these modes are forbidden because they would result in a zero CPU set, e.g. sq_split on a system with a single physical core. We are going to utilize a newly introduced --get-cpu-mask-quiet execution mode introduced to the seastar/script/perftune.py by the "perftune.py: introduce --get-cpu-mask-quiet" series which would return a zero CPU set if that's what it turns out to be instead of exiting with an error what --get-cpu-mask would do in such a case. The rest of scylla_util.py logic is going to handle a zero CPU set returned by get_mode_cpuset() correctly. Fixes #4211 Fixes #4443 Signed-off-by: Vlad Zolotarov <vladz@scylladb.com> Message-Id: <20190731212901.9510-1-vladz@scylladb.com>