Sunday, June 28, 2015

RTL-SDR on FreeBSD, or "hey, cool, I live near an airport, I wonder if ADSB works.."

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I bought one of those cheap RTL-SDR units a few months ago. There's no real kernel code required for it - all of the rtl-sdr code just u...
2 comments:
Sunday, May 17, 2015

freebsd-wifi-build, or "wait, you can run freebsd on atheros MIPS access points? where do I get that?"

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I've been running FreeBSD at home as my primary internet/wifi access for a few years now. It's cheap, it's easy to do, and I...
12 comments:
Friday, April 10, 2015

Intel DDIO, LLC cache, buffer alignment, prefetching, shared locks and packet rates.

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I've been digging into the low level behaviour of high throughput packet classification and pushing for my job. The initial suggestions ...
4 comments:
Saturday, March 28, 2015

Using the arswitch ethernet switch on FreeBSD

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I sat down a few weeks ago to make the AR8327 ethernet switch work and in doing so I wanted to add per-port and 802.1q VLAN support. It turn...
Thursday, March 19, 2015

Cache Line Aliasing #2, or "What happens when you page align everything"

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After a little more digging into the Intel performance side of things, I discovered one of the big reasons for the performance drop on this ...
1 comment:
Friday, March 6, 2015

cache line aliasing effects, or "why is freebsd slower than linux?"

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There was some threads on FreeBSD/DragonflyBSD mailing lists a few years ago (2012?) which talked about some math benchmarks being much slow...
4 comments:
Sunday, February 22, 2015

FreeBSD on the POWER8: it's alive!

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A post to freebsd-ppc from a couple of months ago asked if we had support for POWER8 and offered to provide remote access to anyone interest...
6 comments: