Power consumption is one of the key concerns in modern computers within which I/O consumes a significant portion of power, from portable devices to servers. This concern has led to the development of various hardware and software techniques to improve the energy efficiency of I/O subsystems in the native platform. However, virtualization poses new challenges, preventing those techniques from ac...

Searching and presenting rich data using mobile devices is hard given their inherent I/O limitations. One approach for alleviating these limitations is device symbiosis, whereby the interaction with one’s personal mobile device is augmented by additionally engaging with more capable infrastructure devices, such as kiosks and displays. We have developed a software framework called Celadon, which...

To meet the desired electrostatic discharge (ESD) robustness, ESD diodes was added into the I/O cells of integrated circuits (ICs). However, the parasitic capacitance from the ESD diodes often caused degradation on circuit performance, especially in the high-speed I/O applications. In this work, two modified layout styles to effectively improve the figures of merits (FOMs) of ESD protection dio...

The fact that the strong side cannot enforce a win in KNNK makes many chess players (both humans and computers) prematurely regard KNNKB and KNNKN to be trivially drawn too. This is not true, however, because there are several tricky mate themes in KNNKB and KNNKN which occur more frequently and require more complicated handling than common wisdom thinks. The text analyzes the mate themes and d...

In this paper, we present CacBDD, a new efficient BDD (Binary Decision Diagrams) package. It implements a dynamic cache management algorithm, which takes account of the hit-rate of computed table and available memory. Experiments on the BDD benchmarks of both combinational circuits and model checking show that CacBDD is more efficient compared with the state-of-the-art BDD package CUDD.

This tutorial is intended to provide an in-depth overview of the emerging InfiniBand Architecture (IBA) standard. This new architecture incorporates high performance I/O in addition to interprocessor communication, provides QoS and protection in the network, provides multiple transport services, and allows flexibility of IBA subnets to be connected to Wide Area Networks (WANs) through routers. ...

Big array analytics is becoming indispensable in answering important scientific and business questions. Most analysis tasks consist of multiple steps, each making one or multiple passes over the arrays to be analyzed and generating intermediate results. In the big data setting, I/O optimization is a key to efficient analytics. In this paper, we develop a framework and techniques for capturing a...

Jülich Supercomputing Centre has offered Extreme Scaling Workshops since 2009, with the latest edition in February 2015 giving seven international code teams an opportunity to (im)prove the scaling of their applications to all 458 752 cores of the JUQUEEN IBM Blue Gene/Q. Each of them successfully adapted their application codes and datasets to the restricted compute-node memory and exploit the...

High performance scientific data analysis is plagued by chronically inadequate I/O performance. The situation is aggravated by ever improving processor performance. For high performance multicomputers, such as the Touchstone Delta that possess in excess of 500, 60 megaflops, processor I/O will be the bottleneck for many scientific applications. This report describes ELFS (an ExtensibLe File Sys...

Cooperative caches offer huge amounts of caching memory that is not always used as well as it could be. We might find blocks in the cache that have not been requested for many hours. These blocks will hardly improve the performance of the system while the buffers they occupy could be better used to speedup the I/O operations. In this paper, we present a family of simple prefetching algorithms t...