|Author||Froitzheim, Konrad ♦ Bahmann, Helge|
|Source||ACM Digital Library|
|Publisher||Association for Computing Machinery (ACM)|
|Subject Domain (in DDC)||Computer science, information & general works ♦ Data processing & computer science|
|Subject Keyword||Leader & followers ♦ Futex ♦ Event notification ♦ Synchronization|
|Abstract||Threads in reactive applications need to service a multitude of events from different sources such as device drivers, communication channels or cooperating threads. While notification about these events can conceptually be understood as a form of "synchronization", most operating systems (including Linux) do not provide a unified abstraction. This paper proposes to separate event delivery and notification, and to provide unified event notification through general-purpose synchronization objects. It demonstrates how this unified mechanism can be implemented in Linux as an extension of the futex mechanism to allow notification from kernel-space. Required modifications are discussed and their impact is assessed. The new event notification mechanism allows to move many thread activation policy decisions into user-space, with benefits for multi-threaded reactive applications: This is demonstrated in a modification of the leader/followers pattern with considerable performance benefits.|
|Description||Affiliation: TU Freiberg, Freiberg, Germany (Bahmann, Helge; Froitzheim, Konrad)|
|Age Range||18 to 22 years ♦ above 22 year|
|Education Level||UG and PG|
|Learning Resource Type||Article|
|Publisher Place||New York|
|Journal||ACM SIGOPS Operating Systems Review (OPSR)|
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