Please wait, while we are loading the content...
Please wait, while we are loading the content...
Content Provider | ACM Digital Library |
---|---|
Author | Alipour, Mehdi Carlson, Trevor E. Kaxiras, Stefanos |
Abstract | Out-of-order execution is essential for high performance, general-purpose computation, as it can find and execute useful work instead of stalling. However, it is limited by the requirement of visibly sequential, atomic instruction execution --- in other words in-order instruction commit. While in-order commit has its advantages, such as providing precise interrupts and avoiding complications with the memory consistency model, it requires the core to hold on to resources (reorder buffer entries, load/store queue entries, registers) until they are released in program order. In contrast, out-of-order commit releases resources much earlier, yielding improved performance with fewer traditional hardware resources. However, out-of-order commit is limited in terms of correctness by the conditions described in the work of Bell and Lipasti. In this paper we revisit out-of-order commit from a different perspective, not by proposing another hardware technique, but by examining these conditions one by one and in combination with respect to their potential performance benefit for both non-speculative and speculative out-of-order commit. While correctly handling recovery for all out-of-order commit conditions currently requires complex tracking and expensive checkpointing, this work aims to demonstrate the potential for selective, speculative out-of-order commit using an oracle implementation without speculative rollback costs. We learn that: a) there is significant untapped potential for aggressive variants of out-of-order commit; b) it is important to optimize the commit depth, or the search distance for out-of-order commit, for a balanced design: smaller cores can benefit from shorter depths while larger cores continue to benefit from aggressive parameters; c) the focus on a subset of out-of-order commit conditions could lead to efficient implementations; d) the benefits for out-of-order commit increase with higher memory latency and works well in conjunction with prefetching to continue to improve performance. |
Starting Page | 211 |
Ending Page | 220 |
Page Count | 10 |
File Format | |
ISBN | 9781450344876 |
DOI | 10.1145/3075564.3075581 |
Language | English |
Publisher | Association for Computing Machinery (ACM) |
Publisher Date | 2017-05-15 |
Publisher Place | New York |
Access Restriction | Subscribed |
Content Type | Text |
Resource Type | Article |
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.
Learn more about this project from here.
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.
Sl. | Authority | Responsibilities | Communication Details |
---|---|---|---|
1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
Loading...
|