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Temporal isolation is an increasingly relevant con-
cern in particular for ARINC-351 and virtualisation-
based systems. Traditional approaches like the rate-
based scheduling framework RBED do not take into
account the impact of preemptions in terms of loss of
working set in the acceleration hardware (e.g. caches).
While some improvements have been suggested in the
literature, they are overly heavy in the presence of small
high-priority tasks such as interrupt service routines.
Within this paper we propose an approach enabling
adaptive assessment of this preemption delay in a tem-
poral isolation framework with special consideration of
capabilities and limitations of the approach.