This paper describes the methods used to formulate and validate the memory subsystem of the cache-coherent Sun Scalable Shared-memory MultiProcessor (S3.mp) at three levels of abstraction: the memory consistency model, the cache coherence protocol, and the implementation.

S-Connect is a new high speed, scalable interconnect system that has been developed to support networks of workstations to efficiently share computing resources. It uses off-the-shelf CMOS technology to directly drive fiber-optic systems at speeds greater than 1 Gbit/sec and can realize bisection bandwidths comparable to high-end MPP systems while being >10x more cost-effective. S-Connect systems do not rely on centralized switches, but rather are composed of adaptive, topology independent routing elements that are integrated into each node. The S-Connect routing algorithm is optimized for fine grained, irregular traffic and is designed to support high traffic loads, that can utilize most of the physically available bandwidth. Such traffic is typical of a distributed shared memory system, which is one of the intended applications. S-Connect innovations include a novel distributed phase locking method that allows global synchronization, HW support for multiple message priorities, in-band monitoring and control facilities, and a low overhead channel protocol that supports multiple in-transit messages on the same fiber.The first version of the S-Connect switching element has been successfully implemented in a commercial, 0.65 µm CMOS process.

No abstract available.

Article Free Access Share on Reasoning about networks with many identical finite-state processes Authors: E. M. Clarke Carnegie Mellon University, Pittsburgh Carnegie Mellon University, PittsburghView Profile , O. Grumberg Carnegie Mellon University, Pittsburgh Carnegie Mellon University, PittsburghView Profile , M. C. Browne Carnegie Mellon University, Pittsburgh Carnegie Mellon University, PittsburghView Profile Authors Info & Claims PODC '86: Proceedings of the fifth annual ACM symposium on Principles of distributed computingNovember 1986 Pages 240–248https://doi.org/10.1145/10590.10611Online:01 November 1986Publication History 70citation208DownloadsMetricsTotal Citations70Total Downloads208Last 12 Months14Last 6 weeks0 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

Verifying the correctness of sequential circuits has been an important problem for a long time. But lack of any formal and efficient method of verification has prevented the creation of practical design aids for this purpose. Since all the known techniques of simulation and prototype testing are time consuming and not very reliable, there is an acute need for such tools. In this paper we describe an automatic verification system for sequential circuits in which specifications are expressed in a propositional temporal logic. In contrast to most other mechanical verification systems, our system does not require any user assistance and is quite fast—experimental results show that state machines with several hundred states can be checked for correctness in a matter of seconds!