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[ISO/IEC MPEG contribution] Adding Virtual Memory Support to MPEG4 Hardware Reference Platform

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Tradeoffs between False Sharing and Aggregation in Software Distributed Shared Memory

Willy Zwaenepoel

Software Distributed Shared Memory (DSM) systems based on virtual memory techniques traditionally use the hardware page as the consistency unit. The large size of the hardware page is considered to be a performance bottleneck because of the implied false s ...

1997

Where is Time Spent in Message-Passing and Shared-Memory Programs?

James Richard Larus

Message passing and shared memory are two techniques parallel programs use for coordination and communication. This paper studies the strengths and weaknesses of these two mechanisms by comparing equivalent, well-written message-passing and shared-memory p ...

ACM1994

Tempest and Typhoon: User-Level Shared Memory

James Richard Larus, David Wood

Future parallel computers must efficiently execute not only hand-coded applications but also programs written in high-level, parallel programming languages. Today’s machines limit these programs to a single communication paradigm, either message-passing or ...

ACM1994

Software vs. Hardware Shared Memory Implementation: A Case Study

Willy Zwaenepoel, Sandhya Dwarkadas

We compare the performance of software-supported shared memory on a general-purpose network to hardware-supported shared memory on a dedicated interconnect. Up to eight processors, our results are based on the execution of a set of application programs on ...

1994

Fine-grain access control for distributed shared memory

Babak Falsafi, James Richard Larus, David Wood

The paper discusses implementations of fine-grain memory access control, which selectively restricts reads and writes to cache-block-sized memory regions. Fine-grain access control forms the basis of efficient cache- coherent shared memory. The paper focus ...

1994

Application-specific protocols for user-level shared memory

Babak Falsafi, James Richard Larus, David Wood

Recent distributed shared memory (DSM) systems and proposed shared-memory machines have implemented some or all of their cache coherence protocols in software. One way to exploit the flexibility of this software is to tailor a coherence protocol to match a ...

1994

Kernel support for the Wisconsin Wind Tunnel

Babak Falsafi, David Wood

This paper describes a kernel interface that provides an untrusted user-level process (an executive) with protected access to memory management functions, including the ability to create, manipulate, and execute within subservient contexts (address spaces) ...

1993

The Wisconsin Wind Tunnel: Virtual Prototyping of Parallel Computers

James Richard Larus, David Wood

We have developed a new technique for evaluating cache coherent, shared-memory computers. The Wisconsin Wind Tunnel (WWT) runs a parallel shared-memory program on a parallel computer (CM-5) and uses execution-driven, distributed, discrete-event simulation ...

ACM1993