This study compares the real-time capabilities of various Linux kernels. It was part of a project to upgrade the control software in water-wave generators at research institutions around the world. The results of the study were used by Akamina for the selection of a new RTOS for the control system upgrade of Canada's largest hydraulics and coastal engineering laboratory, the National Research Council Canadian Hydraulics Centre in Ottawa.
This paper is a revised version of the original whitepaper released on November 19, 2004. This version includes updated data for the Linux 2.4 with LXRT configuration. The hard real-time LXRT task, that was originally used to collect the preemption latency data, included a printf() call after the call to make the task hard real-time. Subsequent to release of Linux 24.1.13 and RTAI 3.0x, this has the effect of forcing the task back to soft real-time where, in previous releases, it would not have. The original tests, that showed the LXRT results to be very similar to the Linux 2.4 alone, are what would be expected for LXRT tasks in soft real-time...................
**************** *****************************
Kiggundu Mukasa # Computer Network Consultancy###
KYM-NET LTD. # Intranets & Internet Solutions#
Plot 80 Kanjokya Street
P.O. Box 24284 Kampala, Uganda
Tel: +256 77 972255
+256 71 221141
Fax: +256 31 262122
*****************************************************************_______________________________________________ LUG mailing list [email protected] http://kym.net/mailman/listinfo/lug %LUG is generously hosted by INFOCOM http://www.infocom.co.ug/
