It has been identified based on that the acdc driver is causing high CPU utilization in the kernel-space due to a spinlock contention.
Details of the issue can also be seen in the KB from Red Hat Customer Portal, here (https://access.redhat.com/solutions/5720801).
The fix for this issue will be included in the September release of DSA version 12.0
Note: DS Agent version 20.0 is not affected since it is not using the acdc driver