|Author||Petrović, Darko ♦ Shahmirzadi, Omid ♦ Ropars, Thomas ♦ Schiper, André|
|Subject Domain (in DDC)||Computer science, information & general works ♦ Data processing & computer science|
|Subject Keyword||Direct Advantage ♦ Remote Memory Access ♦ Higher-level Send Receive Interface ♦ On-chip Rma ♦ Message-passing Application ♦ Pipelined K-ary Tree Algorithm ♦ State-of-the-art Broadcast Algorithm ♦ On-chip Message Passing Buffer ♦ Collective Operation ♦ Rma-based Collective Operation ♦ Main Research Direction ♦ Message-passing Many-core Chip ♦ Efficient Broadcast Algorithm ♦ Analytical Evaluation Highlight ♦ Analytical Evaluation ♦ Scalability Issue ♦ On-chip Broadcast ♦ High-performance Rma-based Broadcast ♦ Logp-based Model ♦ Many-core Chip ♦ Hardware Feature ♦ Intel Single-chip Cloud Computer ♦ Message-passing Programming Model ♦ Experimental Result ♦ Intel Scc ♦ Full Advantage ♦ Improves Latency ♦ Future Message-passing Many-core Architecture ♦ Broadcast Algorithm|
|Description||Many-core chips with more than 1000 cores are expected by the end of the decade. To overcome scalability issues related to cache coherence at such a scale, one of the main research directions is to leverage the message-passing programming model. The Intel Single-Chip Cloud Computer (SCC) is a prototype of a message-passing many-core chip. It offers the ability to move data between on-chip Message Passing Buffers (MPB) using Remote Memory Access (RMA). Performance of message-passing applications is directly affected by efficiency of collective operations, such as broadcast. In this paper, we study how to make use of the MPBs to implement an efficient broadcast algorithm for the SCC. We propose OC-Bcast (On-Chip Broadcast), a pipelined k-ary tree algorithm tailored to exploit the parallelism provided by on-chip RMA. Using a LogP-based model, we present an analytical evaluation that compares our algorithm with the state-of-the-art broadcast algorithms implemented for the SCC. As predicted by the model, experimental results show that OC-Bcast attains almost three times better throughput, and improves latency by at least 27%. Furthermore, the analytical evaluation highlights the benefits of our approach: OC-Bcast takes direct advantage of RMA, unlike the other considered broadcast algorithms, which are based on a higher-level send/receive interface. This leads us to the conclusion that RMA-based collective operations are needed to take full advantage of hardware features of future message-passing many-core architectures.|
|Educational Role||Student ♦ Teacher|
|Age Range||above 22 year|
|Education Level||UG and PG ♦ Career/Technical Study|
|Learning Resource Type||Article|
|Publisher Institution||In Proc. 24th ACM Symp. on Parallelism in Alg. and Arch. (SPAA’12|
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
For any issue or feedback, please write to email@example.com