The design of a process migration mechanism for the Amoeba distributed operating system is described. The primary motivation for this implementation is to carry out experimental and realistic studies of load balancing algorithms for a distributed operating system. Our aim has been the implementation of a mechanism which is general, efficient and fully transparent, and which is reliable in the p...

In a multiprocessor system, process migration guarantees load balance between processors but causes passive sharing, since private data blocks of a process can become resident in multiple caches and generate useless coherence-related overhead. We propose a selective invalidation strategy to eliminate these passive shared copies. The results of trace-driven simulation prove that our strategy can...

Thread migration is established as a mechanism for achieving dynamic load sharing. However, fine-grained migration has not been used due to the high thread and messaging overheads. This paper describes a fine-grained thread migration system whose extensible event mechanism permits an efficient interface between threads and communications without compromising the modularity and performance of ei...

Migration concerns saving the current computation state, transferring it to remote machines, and resuming execution at the statement following the migration point. Checkpointing concerns saving the computation state to file systems and resuming execution by restoring the computation state from saved files. Although the statetransfer medium differs, migration and checkpointing share the same str...

BAG is a distributed operating system designed for real-time applications which is run on a distributed real-time system. The heterogeneously distributed BAG system consists of nodes which have VME-bus chassis, different types of processor modules, and an interconnection network. The operating system has three main parts having distributed properties: task migration, load balancing and a distri...

We claim in this paper that both remote process creation and process migration are ejj’icient mechanisms to be used in the improvement or development of high performance computer systems. In particulal; we demonstrate that the claims made by some researchers that process migration is too heavy to be used to support dynamic load balancing are unsubstantiated. We support our claim by presenting t...

Process migration refers to the ability to move a running process from one node and make it continue on another. The MPI standard prescribes support for process migration, but so far it was implemented mostly via checkpoint-restart. This paper presents an automatic and transparent process migration framework that can be used for MPI processes. This framework is advantageous when migration of in...

A steady influx of a single deleterious multilocus genotype will impose genetic load on the resident population and leave multiple descendants carrying various numbers of the foreign alleles. Provided that the foreign types are rare at equilibrium, and all immigrant genes are eventually eliminated by selection, the population structure can be inferred explicitly from the branching process takin...

Mobile Cloud Computing alleviates the limitations of resource-constrained mobile devices by leveraging the cloud resources. Currently, software-level solutions, also known as computational offloading, migrate the cloud-based mobile applications at runtime to the cloud datacenter to optimize the application execution time. However, the application execution frameworks mainly focus on migrating t...

Metadata-based optimizations are the common methods to improve small files performance in local file systems. However, serval problems will be introduced when applying the similar optimizations for small files in cluster file systems. In this paper, we study the tradeoffs between the performance of metadata and small files in metadata-based optimizations for a cluster file system. Our method ai...