Tight tardiness bounds for pseudo-harmonic tasks under global-EDF-like schedulers

S Ahmed, JH Anderson - … on Real-Time Systems (ECRTS 2021), 2021 - drops.dagstuhl.de
The global earliest-deadline-first (GEDF) scheduler and its variants are soft-real-time (SRT)
optimal for periodic/sporadic tasks, meaning they provide bounded tardiness so long as the …

Characterizing global work-conserving scheduling tardiness with uniform instances on multiprocessors

G Buzzega, M Montangero - Real-Time Systems, 2024 - Springer
Soft real-time multiprocessor systems need scheduling policies introducing small overheads
and for which it is possible to give guarantees on tardiness (ie, the maximum delay that …

Extending EDF for soft real-time scheduling on unrelated multiprocessors

S Tang, S Voronov, JH Anderson - 2021 IEEE Real-Time …, 2021 - ieeexplore.ieee.org
Though recent work has established the soft real-time (SRT)-optimality of Earliest-Deadline-
First (EDF) variants on multiprocessor models with limited heterogeneity (eg, uniform speeds …

SlackCheck: A Linux Kernel Module to Verify Temporal Properties of a Task Schedule

M Castrovilli, E Bini - 36th Euromicro Conference on Real-Time …, 2024 - drops.dagstuhl.de
Abstract The Linux Kernel offers several scheduling classes. From SCHED_DEADLINE
down to SCHED_FIFO, SCHED_RR and SCHED_OTHER, the scheduling classes can …

A parallel branch-and-bound algorithm to compute a tighter tardiness bound for preemptive global EDF

M Leoncini, M Montangero, P Valente - Real-Time Systems, 2019 - Springer
In this paper we present a parallel exact algorithm to compute an upper bound to tardiness
of preemptive global EDF (G-EDF) schedulers, named harmonic bound, which has been …

Soft real-time scheduling

JP Erickson, JH Anderson - Handbook of Real-Time Computing, 2022 - Springer
The notion of temporal correctness applicable to a hard real-time system is quite categorical:
such a system is deemed to be temporally correct if and only if no task ever misses a …

A soft-real-time-optimal semi-clustered scheduler with a constant tardiness bound

S Ahmed, JH Anderson - 2020 IEEE 26th International …, 2020 - ieeexplore.ieee.org
Different global and semi-partitioned schedulers have been proposed that are soft-real-time
(SRT) optimal for sporadic task systems, meaning they can guarantee bounded deadline …

Characterizing G-EDF scheduling tardiness with uniform instances on multiprocessors

G Buzzega, G Nocetti, M Montangero - Proceedings of the 31st …, 2023 - dl.acm.org
Soft real-time multiprocessor systems frequently adopt the G-EDF (Global-Earliest Deadline
First) scheduling policy as it is lightweight and it guarantees bounded tardiness. Much effort …

A branch-and-bound algorithm to compute a tighter bound to tardiness for preemptive global EDF scheduler

M Leoncini, M Montangero, P Valente - Proceedings of the 25th …, 2017 - dl.acm.org
Tightness is a crucial property of tardiness bounds; in fact, a too loose bound may cause a
feasible soft real-time application to be mistakenly deemed unfeasible. Recently, a new …

Extending Soft Real-Time Analysis for Heterogeneous Multiprocessors

S Tang - 2024 - search.proquest.com
Though prior work has established the Soft Real-Time (SRT)-optimality of Earliest-Deadline-
First (EDF) variants on multiprocessors with identical and uniform speeds, these …