March 2002
Intermediate to advanced
432 pages
9h
English
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Summary
This chapter explores using Linux as an event timer with 1ms resolution. Linux offers several mechanisms for timing, and the do_gettimeofday function with microsecond resolution works best for the three Project Trailblazer target board processors. Whereas determining maximum interrupt latency is difficult, measuring average interrupt latency is relatively easy. Using the interrupt latency device drivers and an oscilloscope, the engineers found the average interrupt latency for the MZ104, the MediaEngine, and the RPX-CLLF to be 50μs, 10μs, and 35μs, respectively. These impressive numbers alleviated the need for the engineers to explore real-time Linux solutions.
The racetimer_x86 device driver implements a split interrupt driver and a ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.