Last modified: Mon Apr 22 20:02:04 CDT 2002

KURT: The KU Real-Time Linux

KURT v2.3 Beta Release

Here is a preliminary release of the latest KURT and UTIME distribution. View the README files within each tar-file to get started.

Download the New Release

KURT 2.4.13 Kernel Patch

To install this patch, perform the following (asssuming the file was saved in /tmp):

cd /tmp
tar -xvzf kurt-v2.3-beta-2.4.13.patch.tar.gz
Read /tmp/kurt-2.4.13/README for patch installation instructions.

KURT API and Examples

To install the KURT API and example programs, perform the following (assuming the file was saved in /tmp):

cd /tmp
tar -xvzf kurt-v2.3-beta.tar.gz
Read /tmp/kurt/README for installation instructions.

New Features in v2.3

SMP support for both UTIME and KURT
UTIME code has been split into architecture dependent and independent files to ease future ports
Dynamic scheduling facility for KURT, allowing run-time replacement of explicit real-time schedules
Configurable timer offset for UTIME that improves event accuracy (see the run_tests.sh script in the API and Examples distribution)
Configurable scheduling offset for KURT that improves scheduling accuracy (see the run_tests.sh script in the API and Examples distribution)
Reorganized DSKI families for both UTIME and KURT
Autoconf support for the API and Examples distribution

Bug Fixes

Corrected calibration problems for 1GHz+ processors
Corrected compilation issues regarding SCHED_KURT in the example distribution
Corrected concurrency issues in the KURT explicit schedule management code that were causing mangled timer lists within the kernel

New Documentation

An updated user manual will be available soon.

An updated technical report will follow that.

Related Papers and Presentations

The KURT technical report is available in several formats (out-of-date):

PostScript (994K)
gzip'ed PostScript (165K)
PDF (784K)
gzip'ed PDF (666K)

Real Time Linux Workshop, Vienna, Austria

Workshop Paper
- PostScript (461K)
- gzip'ed Postscript (116K)
- PDF (343K)
- gzip'ed PDF (274K)
Workshop Slides
- PostScript (392K)
- gzip'ed Postscript (72K)
- PDF (225K)
- gzip'ed PDF (190K)

Balaji Srinivasan's Master's thesis focused on the design and motivation for KURT (and UTIME) as well as measuring several aspects of its performance.

Master's Thesis
- PostScript (834K)
- gzip'ed PostScript (129K)
- PDF (7893K)
- gzip'ed PDF (1679K)
- HTML (single page)
Master's Defense (Slides)
- PostScript (1831K)
- gzip'ed PostScript (171K)

Robert Hill's Master's thesis focused on improving Linux real-time support. Specifically, scheduling, the I/O subsystem, and network QoS.

Master's Thesis -- Figures 4.3 - 4.6 are graphically intensive figures and drastically increase the size of the document. You can download the document with or without these figures and can also download the figures separately.
- With figures 4.3 - 4.6
  - gzip'ed PostScript (3.6M - over 35M unzipped)
  - gzip'ed PDF (8.5M - over 100M unzipped)
- Without figures 4.3 - 4.6
  - PostScript (631K)
  - gzip'ed PostScript (143K)
  - PDF (8.9M)
  - gzip'ed PDF (1.9M)
- figures 4.3 - 4.6
  - gzip'ed PostScript (3.5M - over 35M unzipped)
  - gzip'ed PDF (6.6M - over 100M unzipped)
Master's Defense (Slides)
- gzip'ed PostScript (2.8M - over 25M unzipped)
- gzip'ed PDF (5.5M - over 70M unzipped)

Real-Time Technology Applications Symposium

RTAS Conference Paper
- PostScript (368K)
- gzip'ed Postscript (78.5K)
- PDF (1.2M)
- gzip'ed PDF (253K)
RTAS Conference Slides
- PostScript (6M)
- gzip'ed Postscript (1.6M)
- PDF (11.6M)
- gzip'ed PDF (3.2M)

Please report bugs/suggestions/comments to KURT@ITTC.

We will be updating this page as time allows. To see the original KURT page, go here.

Comments are welcome on how we can improve this system and this document.You can also subscribe to the KURT mailing list by sending a mail to majordomo@ittc.ku.edu with the body

 subscribe linux-kurt <your-email-address>