Results 1 - 10 of 1,609

Wayback: a user-level versioning file system for linux

by Brian Cornell, Peter A. Dinda, Fabián E. Bustamante - In Proceedings of the annual conference on USENIX Annual Technical Conference, ATEC ’04 , 2004
"... In a typical file system, only the current version of a file (or directory) is available. In Wayback, a user can also ac-cess any previous version, all the way back to the file’s creation time. Versioning is done automatically at the write level: each write to the file creates a new version. Wayback ..."
Abstract - Cited by 43 (2 self) - Add to MetaCart
. Wayback implements versioning using an undo log structure, ex-ploiting the massive space available on modern disks to provide its very useful functionality. Wayback is a user-level file system built on the FUSE framework that relies on an underlying file system for access to the disk. In ad

The BSD Packet Filter: A New Architecture for User-level Packet Capture

by Steven Mccanne, Van Jacobson , 1992
"... Many versions of Unix provide facilities for user-level packet capture, making possible the use of general purpose workstations for network monitoring. Because network monitors run as user-level processes, packets must be copied across the kernel/user-space protection boundary. This copying can be m ..."
Abstract - Cited by 568 (2 self) - Add to MetaCart
Many versions of Unix provide facilities for user-level packet capture, making possible the use of general purpose workstations for network monitoring. Because network monitors run as user-level processes, packets must be copied across the kernel/user-space protection boundary. This copying can

TreadMarks: Distributed Shared Memory on Standard Workstations and Operating Systems

by Pete Keleher , Alan L. Cox, Sandhya Dwarkadas, Willy Zwaenepoel - IN PROCEEDINGS OF THE 1994 WINTER USENIX CONFERENCE , 1994
"... TreadMarks is a distributed shared memory (DSM) system for standard Unix systems such as SunOS and Ultrix. This paper presents a performance evaluation of TreadMarks running on Ultrix using DECstation-5000/240's that are connected by a 100-Mbps switch-based ATM LAN and a 10-Mbps Ethernet. Ou ..."
Abstract - Cited by 526 (17 self) - Add to MetaCart
. Our objective is to determine the efficiency of a user-level DSM implementation on commercially available workstations and operating systems. We achieved good speedups on the 8-processor ATM network for Jacobi (7.4), TSP (7.2), Quicksort (6.3), and ILINK (5.7). For a slightly modified version

GOLOG: A Logic Programming Language for Dynamic Domains

by Hector J. Levesque, Raymond Reiter, Yves Lespérance, Fangzhen Lin, Richard B. Scherl , 1994
"... This paper proposes a new logic programming language called GOLOG whose interpreter automatically maintains an explicit representation of the dynamic world being modeled, on the basis of user supplied axioms about the preconditions and effects of actions and the initial state of the world. This allo ..."
Abstract - Cited by 628 (74 self) - Add to MetaCart
for applications in high level control of robots and industrial processes, intelligent software agents, discrete event simulation, etc. It is based on a formal theory of action specified in an extended version of the situation calculus. A prototype implementation in Prolog has been developed.

Dynamo: A Transparent Dynamic Optimization System

by Vasanth Bala, Evelyn Duesterwald , Sanjeev Banerjia - ACM SIGPLAN NOTICES , 2000
"... We describe the design and implementation of Dynamo, a software dynamic optimization system that is capable of transparently improving the performance of a native instruction stream as it executes on the processor. The input native instruction stream to Dynamo can be dynamically generated (by a JIT ..."
Abstract - Cited by 479 (2 self) - Add to MetaCart
native binaries can be accelerated Dynamo, and often by a significant degree. For example, the average performance of --O optimized SpecInt95 benchmark binaries created by the HP product C compiler is improved to a level comparable to their --O4 optimized version running without Dynamo. Dynamo achieves

Processes vs. user-level threads in Scsh

by Martin Gasbichler, Michael Sperber, Universität Tübingen - In Proceedings of the 3rd Workshop on Scheme and Functional Programming (3 , 2002
"... The new version of scsh enables concurrent system programming with portable user-level threads. In scsh, threads behave like processes in many ways. Each thread receives its own set of process resources. Like Unix processes, forked threads can inherit resources from the parent thread. To store these ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
The new version of scsh enables concurrent system programming with portable user-level threads. In scsh, threads behave like processes in many ways. Each thread receives its own set of process resources. Like Unix processes, forked threads can inherit resources from the parent thread. To store

Application-specific User-Level Thread Schedulers

by Matthew D. Roper, Matthew D. Roper , 2005
"... This paper describes CATAPULTS, a domain-specific language for creating and testing application-specific user-level thread schedulers. Using a domain-specific language to write user-level thread schedulers provides three advantages. First, it modularizes the thread scheduler, making it easy to plug ..."
Abstract - Add to MetaCart
This paper describes CATAPULTS, a domain-specific language for creating and testing application-specific user-level thread schedulers. Using a domain-specific language to write user-level thread schedulers provides three advantages. First, it modularizes the thread scheduler, making it easy to plug

Abstract Processes vs. User-Level Threads in Scsh

by unknown authors
"... The new version of scsh enables concurrent system programming with portable user-level threads. In scsh, threads behave like processes in many ways. Each thread receives its own set of process resources. Like Unix processes, forked threads can inherit resources from the parent thread. To store these ..."
Abstract - Add to MetaCart
The new version of scsh enables concurrent system programming with portable user-level threads. In scsh, threads behave like processes in many ways. Each thread receives its own set of process resources. Like Unix processes, forked threads can inherit resources from the parent thread. To store

Simplifying the Recovery Model of User-Level Failure Mitigation

by Wesley Bl, Kenneth Raffenetti, Pavan Balaji
"... ing has matured, so too have the tools, libraries, and languages that result from it. The Message Passing Interface (MPI) Forum is considering the addition of fault tolerance to a future version of the MPI standard, and a new chapter called User-Level Failure Mitigation (ULFM) has been proposed to f ..."
Abstract - Add to MetaCart
ing has matured, so too have the tools, libraries, and languages that result from it. The Message Passing Interface (MPI) Forum is considering the addition of fault tolerance to a future version of the MPI standard, and a new chapter called User-Level Failure Mitigation (ULFM) has been proposed

The performance of µ-kernel-based systems

by Hermann Härtig, Michael Hohmuth, Jochen Liedtke, Sebastian Schönberg, Jean Wolter - In 16 th ACM Symposium on Operating Systems Principles , 1997
"... First-generation µ-kernels have a reputation for being too slow and lacking sufficient flexibility. To determine whether L4, a lean second-generation µ-kernel, has overcome these limitations, we have repeated several earlier experiments and conducted some novel ones. Moreover, we ported the Linux op ..."
Abstract - Cited by 148 (17 self) - Add to MetaCart
that of native Linux. The corresponding penalty is 5 times higher for a co-located in-kernel version of MkLinux, and 7 times higher for a user-level version of MkLinux. These numbers demonstrate both that it is possible to implement a high-performance conventional operating system personality above a µ
Results 1 - 10 of 1,609