ITWorld Article: Open source jobs: What's hot, where to look, what to learn

Check out this interesting article on ITWorld about open source jobs:

Open Source Jobs: What's Hot and Where to Look

  • By challinan at 2011-11-08 10:56
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Embedded Linux Primer Second Edition

Well it's finally done. The second edition of Embedded Linux Primer was completed last month, and should be on store shelves by mid-November 2010. It's already listed on Amazon.com.

Thanks to all those who supported the 1st edition.

Calling All Radio Amateurs

I recently revived a life-long hobby. I was first licensed as a Ham Radio operator in December of 1972, a few weeks after my 13th birthday. Then, as now, I loved to tinker with electronics and build stuff from scratch. I earned my Amateur Extra license at age 16, and still use that call today: K1AY. I was licensed as DA1WD during the three years that I lived near Munich, Germany as a United States Army technical specialist.

Embedded Linux Training

This is a placeholder for information related to Embedded Linux training.

I am considering developing a series of training "webinars" having general interest to embedded Linux developers. My current thinking is to start with short howto series, with examples of flash layout, MTD configuration, multi-media application usage, performance tuning, debugging, fast boot, and many other topics. These would be presentation-style, with audio and slide-ware, each maybe 45 minutes in length, covering single topics of interest.

Tips for new visitors

Welcome
Thanks for visiting my site. If you have purchased a copy of my new book "Embedded Linux Primer" please send me e-mail with any comments you might have, good or bad. Thanks!

Note that if you create an account, that will enable much more functionality. Anonymous users have limited access to this site.

There are several things you can do here.

Forums

Performance Benchmarks

Here's a short list of some useful and interesting performance benchmarks used in Linux:

LTP
bonnie++
dbench
iozone
iperf
lmbench
netperf
tbench
Crackerjack
TTCP
httperf
Dhrystone

  • By challinan at 2011-03-10 11:04
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Playing ogg files through gstreamer

From my colleage Ned Miljevic:

Here is a Gstreamer pipeline to play your favorite ogg file on Beagle board using gstreamer and alsa.

$ gst-launch filesrc location="your_ogg_file_path" ! oggdemux ! vorbisdec ! audioconvert ! alsasink

maybe audioconvert not necesaary, didn't have time to find out :)

Way cool!

How to get rythmbox to play through Jack

Source: http://ubuntuforums.org/archive/index.php/t-554457.html

This is a lot easier than trying to get it to work through PulseAudio, as I did before, and works much more reliably. Gstreamer includes a jackaudiosink plugin in the gstreamer-plugins-bad package, though it won't show up in sound properties without a little hacking.

First you need some stuff. Before that disable 'esd software mixing' in the Sounds tab of gnome-sound-properties (system->preferences->sound). Get some ladspa plugins, jack-rack, jack.plumbing, the bad plugins, patchage to see that everything works, and of course jackd (make sure you have universe/multiverse enabled):

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