The Virtual Interface Architecture

Dunning, Dave; Regnier, G.; McAlpine, G.; Cameron, David; Shubert, B.; Berry, François; Merritt, A.M.; Gronke, E.; Dodd, C.

doi:10.1109/40.671404

Cited by 206 publications

(94 citation statements)

References 11 publications

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“…By implementing a network stack at the user level, we have control over the behaviors of various communication protocols. In effect, this is similar to U-Net [von Eicken et al 1995], Ethernet Message Passing (EMP) [Shivam et al 2001], and the Virtual Interface Architecture (VIA) [Dunning et al 1998], which all provide abstractions for user-level network implementation. In contrast, our work allows user-level extensions to run efficiently enough to be invoked as handlers for networking events, without the need for special hardware support.…”

Section: User-level Networking In the Sandboxmentioning

confidence: 99%

Application-specific service technologies for commodity operating systems in real-time environments

West

Parmer

2011

ACM Trans. Embed. Comput. Syst.

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In order to eliminate the costs of proprietary systems and special purpose hardware, many real-time and embedded computing platforms are being built on commodity operating systems and generic hardware. Unfortunately, many such systems are ill-suited to the low-latency and predictable timing requirements of real-time applications. This article, therefore, focuses on application-specific service technologies for low-cost commodity operating systems and hardware, so that real-time service guarantees can be met. We describe contrasting methods to deploy first-class services on commodity systems that are dispatched with low latency and execute asynchronously according to bounds on CPU, memory, and I/O device usage. Specifically, we present a "user-level sandboxing" (ULS) mechanism that relies on hardware protection to isolate applicationspecific services from the core kernel. This approach is compared with a hybrid language and runtime protection scheme, called SafeX, that allows untrusted services to be dynamically linked and loaded into a base kernel. SafeX and ULS have been implemented on commodity Linux systems. Experimental results have shown-that both approaches are capable of reducing service violations (and, hence, better qualities of service) for real-time tasks, compared to traditional user-level methods of service deployment in processprivate address spaces. ULS imposes minimal additional overheads on service dispatch latency compared to SafeX, with the advantage that it does not require application-specific services to execute in the trusted kernel domain. As evidence of the potential capabilities of ULS, we show how a user-level networking stack can be implemented to avoid data copying via the kernel and allow packet processing without explicit process scheduling. This improves throughput and reduces jitter.

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Section: User-level Networking In the Sandboxmentioning

confidence: 99%

Application-specific service technologies for commodity operating systems in real-time environments

West

Parmer

2011

ACM Trans. Embed. Comput. Syst.

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“…An interesting and efficient approach on this direction, is the development of the Virtual Interface Architecture (Dunning, 1998) that defines mechanisms allowing the bypass of the layers of the protocol stack, avoiding thus the generation of the intermediate copies of data during sending and receiving messages. This bypass improves significantly the application performance, not only because eliminates this overhead, but because decreases the processor utilization by the communication subsystem.…”

Section: Lam Performancementioning

confidence: 99%

Local Area Multicomputer (LAM -MPI)

Margaris¹

2013

CIS

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The objective of this paper is the short description of the LAM (Local Area Multicomputer) implementation of MPI that can be used for the development of parallel applications based on the message passing interface. The paper describes the main aspects of the LAM environment such as the LAM architecture, configuration and use. A comparison between the LAM and the MPICH implementation (another very popular and commonly used MPI implementation) with respect to their performance is also presented.

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“…A multi-threaded SDSM and a message-passing library compose the runtime system. To provide thread-safe communication, we implemented a subset of MPI [8] library for Virtual Interface Architecture (VIA) [9]. We also developed our own SDSM system, which provides a home-based lazy release consistency (HLRC) [10] with migratory home to exploit data locality.…”

Section: The Atomic Page Update Problemmentioning

confidence: 99%