Chris J. Walter

TL;DR: In this paper, a fault tolerator for an operations controller of a multiple-node fault tolerant processing system has been proposed, which includes an error file for storing the content of all received inner node error reports, an error handler for generating a base penalty count for each node based on the contents of the errors recorded in the error file and for excluding each node from the operation of the multiple node processing system whose base penalty counts exceeds an exclusion threshold.

TL;DR: In this paper, a synchronizer for each node in a multiple node processing system having a message interface for receiving sync and pre-sync time-dependent message, counter means for generating a local time, a time stamp memory having an entry for every node in the multiple-node processing system, and a time stamper responsive to receiving a time dependent message from a node for storing the local time in the entry of said time stamp for that node to generate a time stamps.

TL;DR: In this paper, a task scheduler for a fault tolerant multiple node processing system has a task activity list storing a set of application tasks, a priority scan list storing selected portion of the set of tasks, and a completion status list also storing the same selected portions of the tasks.

TL;DR: Fault tolerance concepts and hard real-time perspectives that apply jointly to ultra-dependable systems for critical control applications are explored.