Resources for “Real-Time and Performance Improvements in the 2.6 Linux Kernel”

Resources for the print article.

“Realfeel Test of the Preemptible Kernel Patch” by Andrew Webber: www.linuxjournal.com/article/6405

Real-Time Patches and Projects

2.4 Pre-emptible Linux Kernel Patch: kpreempt.sourceforge.net

2.6 Real-Time and Preemption Patch from Ingo Molnar: redhat.com/~mingo/realtime-preempt

MontaVista Real-Time Project: source.mvista.com/linux_2_6_RT.html

RTAI Project: www.rtai.org

DIAMPM RTAI (Real-Time Application Interface): www.aero.polimi.it/~rtai

Benchmarks

realfeel Benchmark: brain.mcmaster.ca/~hahn/realfeel.c

______________________

Comments

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Time interval

Anonymous's picture

Figure 3 is reported as a 1 min. run time.

The end of the test period, around 3500, shows a increase in jitter. Has a longer than 1 min. run been tested? What do the results above 1 min. show?

Am I seeing a bug?

John Major's picture

Great article. Clears up that nagging "I know this is good but how does it help?" I had about preemtable kernel. When I look at the jitter results in figure three I have two related questions. Why is the distribution so balanced in the vertical direction (rather than skewed mostly to the positive), and why are almost all the positive data points balanced almost exactly by a negative point. Could this be a bug in Realfeel where a 'delayed' interrupt incorrectly causes a successive accurate interrupt to be reported as 'early' by the same amount? You can also see a few points in figures one and two where they exceed the general noise.

Webcast
How to Build an Optimal Hadoop Cluster to Store and Maintain Unlimited Amounts of Data Using Microservers

Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.

Learn More

Sponsored by AMD

White Paper
Red Hat White Paper: Using an Open Source Framework to Catch the Bad Guy

Built-in forensics, incident response, and security with Red Hat Enterprise Linux 6

Every security policy provides guidance and requirements for ensuring adequate protection of information and data, as well as high-level technical and administrative security requirements for a system in a given environment. Traditionally, providing security for a system focuses on the confidentiality of the information on it. However, protecting the data integrity and system and data availability is just as important. For example, when processing United States intelligence information, there are three attributes that require protection: confidentiality, integrity, and availability.

Learn more about catching the bad guy in this free white paper.

Learn More

Sponsored by DLT Solutions