16,945 research outputs found
Open systems storage platforms
The building blocks for an open storage system includes a system platform, a selection of storage devices and interfaces, system software, and storage applications CONVEX storage systems are based on the DS Series Data Server systems. These systems are a variant of the C3200 supercomputer with expanded I/O capabilities. These systems support a variety of medium and high speed interfaces to networks and peripherals. System software is provided in the form of ConvexOS, a POSIX compliant derivative of 4.3BSD UNIX. Storage applications include products such as UNITREE and EMASS. With the DS Series of storage systems, Convex has developed a set of products which provide open system solutions for storage management applications. The systems are highly modular, assembled from off the shelf components with industry standard interfaces. The C Series system architecture provides a stable base, with the performance and reliability of a general purpose platform. This combination of a proven system architecture with a variety of choices in peripherals and application software allows wide flexibility in configurations, and delivers the benefits of open systems to the mass storage world
Network-aware design-space exploration of a power-efficient embedded application
The paper presents the design and multi-parameter optimization of a networked embedded application for the health-care domain. Several hardware, software, and application parameters, such as clock frequency, sensor sampling rate, data packet rate, are tuned at design- and run-time according to application specifications and operating conditions to optimize hardware requirements, packet loss, power consumption. Experimental results show that further power efficiency can be achieved by considering also communication aspects during design space exploratio
Influence of Input/output Operations on Processor Performance
Nowadays, computers are frequently equipped with peripherals that transfer great
amounts of data between them and the system memory using direct memory access
techniques (i.e., digital cameras, high speed networks, . . . ). Those peripherals prevent the
processor from accessing system memory for significant periods of time (i.e., while they
are communicating with system memory in order to send or receive data blocks). In this
paper we study the negative effects that I/O operations from computer peripherals have on
processor performance. With the help of a set of routines (SMPL) used to make discrete
event simulators, we have developed a configurable software that simulates a computer
processor and main memory as well as the I/O scenarios where the periph-erals operate.
This software has been used to analyze the performance of four different processors in four
I/O scenarios: video capture, video capture and playback, high speed network, and serial
transmission
A Dual Digital Signal Processor VME Board For Instrumentation And Control Applications
A Dual Digital Signal Processing VME Board was developed for the Continuous
Electron Beam Accelerator Facility (CEBAF) Beam Current Monitor (BCM) system at
Jefferson Lab. It is a versatile general-purpose digital signal processing
board using an open architecture, which allows for adaptation to various
applications. The base design uses two independent Texas Instrument (TI)
TMS320C6711, which are 900 MFLOPS floating-point digital signal processors
(DSP). Applications that require a fixed point DSP can be implemented by
replacing the baseline DSP with the pin-for-pin compatible TMS320C6211. The
design can be manufactured with a reduced chip set without redesigning the
printed circuit board. For example it can be implemented as a single-channel
DSP with no analog I/O.Comment: 3 PDF page
On Making Emerging Trusted Execution Environments Accessible to Developers
New types of Trusted Execution Environment (TEE) architectures like TrustLite
and Intel Software Guard Extensions (SGX) are emerging. They bring new features
that can lead to innovative security and privacy solutions. But each new TEE
environment comes with its own set of interfaces and programming paradigms,
thus raising the barrier for entry for developers who want to make use of these
TEEs. In this paper, we motivate the need for realizing standard TEE interfaces
on such emerging TEE architectures and show that this exercise is not
straightforward. We report on our on-going work in mapping GlobalPlatform
standard interfaces to TrustLite and SGX.Comment: Author's version of article to appear in 8th Internation Conference
of Trust & Trustworthy Computing, TRUST 2015, Heraklion, Crete, Greece,
August 24-26, 201
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