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A Quick Look at the SoftIron OverDrive 1000
ARM processors are ubiquitous in mobile, but you won’t find a lot of developers using ARM-based boxes for their day-to-day work. Recently I needed some ARM machines for compiler work and got a few Raspberry Pi 3 boards, which seemed reasonable since these have four cores at 1.2 GHz. However, while these boards are far…
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Introduction to Precision Farming
[My father, David Regehr, encouraged me to write this piece, provided some of its content, edited it, and agreed to let me use data from his farm.] [For readers outside the USA: Alas, we do not farm in metric here. In case you’re not familiar with the notation, 10″ is ten inches (25.4 cm) and…
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Zion NP and Environs in Winter
As we enter faculty and grad recruiting season, I’d like to present a bit of Utah propaganda. No heroics are required to see this stuff: just a few hours driving from Salt Lake City (on pavement) and some mild day hiking. I’ll provide detailed instructions for visiting any of these locations upon request.
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Testing LLVM
[This piece is loosely a followup to this one.] Background Once a piece of software reaches a certain size, it is guaranteed to be loosely specified and not completely understood by any individual. It gets committed to many times per day by people who are only loosely aware of each others’ work. It has many…
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A Tourist’s Guide to the LLVM Source Code
In my Advanced Compilers course last fall we spent some time poking around in the LLVM source tree. A million lines of C++ is pretty daunting but I found this to be an interesting exercise and at least some of the students agreed, so I thought I’d try to write up something similar. We’ll be…