This paper describes a checkpointing mechanism destined for Distributed Shared Memory (DSM) systems with speculative prefetching. Speculation is a general technique involving prediction of the future of a computation, namely accesses to shared objects unavailable on the accessing node (read faults). Thanks to such predictions objects can be fetched before the actual access operation is performe...

As clusters continue to grow in size and complexity, providing scalable and predictable performance is an increasingly important challenge. A crucial roadblock to achieving predictable performance is stragglers, i.e., tasks that take significantly longer than expected to run. At this point, speculative execution has been widely adopted to mitigate the impact of stragglers. However, speculation ...

This paper examines the role of technoscientific speculation in large-scale development projects postcolonial spaces, building on recent work STS, design research, and studies beyond CSCW. We analyze two historical cases technology-infused Canadian province Newfoundland Labrador Jamaica. find that these contexts remixes constructive stance toward typical for normative technoscience with critica...

In a parallel graph reduction system, speculative evaluation can increase parallelism by performing potentially useful computations before they are known to be necessary. Speculative computations may be coded explicitly in a program, or they may be scheduled implicitly by the reduction system as idle processors become available. A general approach to both kinds of speculation incurs a great dea...