WCET and mixed-criticality : What does confidence in WCET estimations depend upon?

• Mixed-criticality systems integrate components of different criticality. Different criticality levels require different levels of confidence in the correct behavior of a component. One aspect of correctness is timing. Confidence in worst-case execution time (WCET) estimates depends on the process by which they have been obtained. A somewhat naive view is that static WCET analyses determines safe bounds in which we can have absolute confidence, while measurement-based approaches are inherently unreliable. In this paper, we refine this view by exploring sources of doubt in the correctness of both static and measurement-based WCET analysis.

Subject headings

NATURVETENSKAP  -- Data- och informationsvetenskap -- Systemvetenskap, informationssystem och informatik (hsv//swe)

NATURAL SCIENCES  -- Computer and Information Sciences -- Information Systems (hsv//eng)

Keyword

Confidence in WCET estimates

Mixed criticality

WCET analysis

Measurement-based

Measurement-based approach

Mixed criticalities

Mixed-criticality systems

Safe bounds

Worst-case execution time

Criticality (nuclear fission)

Publication and Content Type

ref (subject category)

kon (subject category)