Bits Up!

Real data and musings on the performance of networks, servers, protocols, and their related folks.

Monday, November 24, 2008

Dallas One-Wire Temperature Network - Followup

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I managed to get the little 5-volt 1 wire network I mentioned earlier , built up and running. Even fishing the wires wasn't too hard, ...
Monday, November 10, 2008

One-Wire Home Temperature Network with Linux - a prototype

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So, I live in Maine. The locals say, quite correctly, that its the way life oughta be. The way we keep massive hordes away from our paradise...
Saturday, November 8, 2008

DNS Prefetching for Firefox

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Recently I implemented patches to implement DNS prefetching in Firefox. I am primarily interested in their impact on Fennec (aka Mobile Fir...
Sunday, September 28, 2008

Asynchronous DNS lookups on Linux with getaddrinfo_a()

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A little while back I posted about a bug in the glibc getaddrinfo() implementation which resulted in many CNAME lookups having to be repeat...
Tuesday, September 23, 2008

Simulating Wireless Networks With Linux

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I have been working on enhancing network performance for the upcoming Firefox on Mobile . I jokingly refer to this work as "finding use...
Thursday, September 11, 2008

The minutia of getaddrinfo() and 64 bits

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I have been spending some time recently improving the network behavior of Firefox in mobile (i.e. really high latency, sort of low bandwidt...
Friday, May 30, 2008

Firefox Add-Ons - webfolder webDAV add-on updated for Firefox 3

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I have had reason to do a little server side WebDAV work these days. WebDav clients for Linux aren't all that common. There is a filesy...
Friday, April 18, 2008

Measuring performance of Linux Kernel likely() and unlikely()

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A little while back I wrote about how prominent likely() and unlikely() are in the Linux kernel, and yet I could not find any performance m...
Monday, April 14, 2008

Monitoring IP changes with NETLINK ROUTE sockets

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Yesterday I read a mailing list query asking how to get event driven Linux IP address changes (i.e. without having to poll for them). I agr...
Tuesday, April 8, 2008

IP Georeferencing

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IP Georeferencing is a pretty cool toolbox item on today's web. Simply put, its the process of taking an IP address and converting it t...
Saturday, April 5, 2008

Linux Selective Acknowledgment (SACK) CPU Overhead

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Last year I tossed an e-mail from the Linux kernel networking list in my "projtodo" folder. The mail talked about how the Linux TC...
Thursday, April 3, 2008

Linux Kernel - likely() not measured?

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The other day on kernelnewbies, the able Robert Day wondered whether or not anyone had quantified the effects of the likely() and unlikely(...
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Patrick McManus
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