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2024-05-23 - 21:52

Dates and Events:

OSADL Articles:

2023-11-12 12:00

Open Source License Obligations Checklists even better now

Import the checklists to other tools, create context diffs and merged lists


2023-03-01 12:00

Embedded Linux distributions

Results of the online "wish list"


2022-01-13 12:00

Phase #3 of OSADL project on OPC UA PubSub over TSN successfully completed

Another important milestone on the way to interoperable Open Source real-time Ethernet has been reached


2021-02-09 12:00

Open Source OPC UA PubSub over TSN project phase #3 launched

Letter of Intent with call for participation is now available



Real Time Linux Workshops

1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010

Ninth Real-Time Linux Workshop on November 2 to 4, 2007, in Linz, Austria


Bounding disk I/O response time for real-time systems

V. Brocal, M. Masmano, I. Ripoll, and A. Crespo

Real-time I/O scheduling, specifically disk scheduling, has frequently received far less attention than other aspects of real-time theory. Nevertheless, several proposals have addressed this area meaning to merge the real-time CPU scheduling along with traditional I/O scheduling to provide real-time disk response. These proposals are all based on simplistic and unrealistic disk models that only consider mechanical parameters, leaving apart capabilities such as prefetching or write-caching. In our opinion, real-time I/O scheduling algorithms should take advantage of these additional mechanisms to increase sensitively I/O performance. In this paper, we present our first approach to a new model of a modern hard-disk (taken advantage of their features, specifically, their capability to identify streaming access patterns and prefetching a number of sectors belonging this stream). Besides, we also describe how we have implemented our experiments in RTLinux.

 

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