Repository logo

Browsing by Author "Nikolić, Borislav"

Now showing 1 - 2 of 2
  • Multi-Level Preemption in TSN: Feasibility and Requirements Analysis
    Publication . Ojewale, Mubarak; Meumeu Yomsi, Patrick; Nikolić, Borislav
    To overcome the limitation of strictly non-preemptive frame transmission in Ethernet networks, the IEEE 802.1Qbu standard was introduced. This standard specifies a one-level frame preemption paradigm wherein, depending on their priority levels, frames are grouped into two categories: namely, the “express frames” and the “preemptable frames”. These two categories are given with the interpretation that (1) only express frames can preempt preemptable frames; and (2) two frames belonging to the same category cannot preempt each other. While this approach partially solves the problem, some preemptable frames can still suffer long blocking periods, irrespective of their individual priority levels. Indeed, there are frames that do not fall into the express frames category, but nevertheless have firm timing requirements that can only be met if they can benefit from preempting lower priority frames. To ameliorate the condition of such frames, we propose a multi-level preemption paradigm. Specifically, we expose the limitations of the one-level preemption approach experimentally; and we present the feasibility and implementation requirements of the multi-level preemption scheme in details.
    2020Conference object Restricted access Show more
  • Towards realistic core-failure-resilient scheduling and analysis
    Publication . Nikolić, Borislav; Bletsas, Konstantinos
    Goal: Meeting all task deadlines on a multicore platform even when a core suddenly fails and is rendered unusable. • Model: When a core fails, whichever task was running there is killed but its deadline must still be met
    2015Other Open access Show more