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For internet connection I use a cable modem EPC3208 from Cisco, which was supplied by the cable provider, Unitymedia (now Vodafone) in my case. It shows the following measurements regarding signal-to-noise ratio, modem is at 192.168.100.1: More information on this modem can be found here: Cisco…
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Mainframe rehosting is about replacing the whole mainframe with one or multiple Linux boxes, or at times, move portions of the application landscape from the mainframe to Linux. Thereby you basically keep many of the hitherto used development- and runtime-environment, like COBOL, DB2, IMS, CICS,…
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Impressive numbers from WordPress.com: 827 terabytes of data, 400.000 new users, 7 million logins, 1 billion of pageviews. From March Wrap-Up, written by Matt Mullenweg: In March we brought you P2, an awesome theme perfect for short-form and group blogging, made with love by Automatticians. Next,…
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Loop unrolling is not only good for sequential programming, it has similar dramatic effects in highly parallel codes as well, see Unrolling parallel loops (local copy), also see #pragma unroll in the NVidia CUDA programming guide. Some bullet points of the presentation: More resources consumed per…
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See how to use ttf fonts in xterm in the NetBSD tutorial. To get TrueType fonts by default in uxterm or xterm I added the following lines in .Xdefaults: XTerm*faceName: Bitstream Vera Serif Mono XTerm*faceSize: 14 UXTerm*faceName: Bitstream Vera Serif Mono UXTerm*faceSize: 14 It didn't work if I…
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Very good article on open company communication by Sara Rosso, who works for WordPress. The article below centers around these headlines. Be distributed Be Online Be Transparent Work Hard, Play Hard When I Have Time by Sara Rosso Update: I gave a similar presentation at LeWeb about the Future…
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Instead of starting X like xinit /usr/bin/icewm and therefore loading the NVidia CUDA environment, one can simply add [ -c /dev/nvidia0 ] || mknod -m 666 /dev/nvidia0 c 195 0 [ -c /dev/nvidiactl ] || mknod -m 666 /dev/nvidiactl c 195 255 to `/etc/init.d/boinc-client` assuming one has a single…
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Interesting slides from Valve on their venture to Linux: Porting Source to Linux - Valve's Lessons Learned
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See an article by a guy named johnraff, Access Google translate from a terminal, or reblogged by Dmitry Sandalov here Access Google translate from a terminal. Works great. Here are some examples: translate Weg Way translate "Ich gehe nach Hause" I'm going home
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In Phoronix there is an interesting comparison between Nouveau and proprietary NVidia graphics driver, see NVIDIA vs. Nouveau Drivers On Ubuntu 13.04.
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Since more than ten years I use IceWM, a clean and compact window manager for X. I can only recommend it. IceWM in its own words: The goal of IceWM is speed, simplicity, and not getting in the user's way. These goals are nicely met. Among the features of IceWM: multiple workspaces easily move…
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An interesting article in Wikipedia on calculating a first approximation of the inverse of the square root Fast inverse square root, or 0x5f3759df - calculating inverse square root
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Compare linux-3.8.4: Compile times. This time we compiled Linux kernel 3.9 and used time make -j 20 according Compiler Speed-up. My 8-core machine is fully loaded, as can be seen by top: top - 21:08:50 up 30 min, 10 users, load average: <strong>21.92</strong>, 16.95, 8.40 Tasks: 257…
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Article on Max Planck Institute Millenium Simulation. Pictures of the galaxy distribution Addendum: There is an article on the Millenium Simulation in Brian Koberlein's article Sim Universe.
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Brian Koberlein on Google+ on Astronomy (dead link) contains a number of interesting articles on current developments in astronomy and relativity. Added 31-Aug-2013: Brian Koberlein now has a WordPress powered separate web presence: www.briankoberlein.com. Added 21-Oct-2013: Brian Koberlein noted…
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Very good article by Bruce Dawson on timing CPU bound application. Results are: Using $(expr) to do math is over a hundred times slower than using bash internals. This is not a new discovery, but it’s worth reiterating. Excessive use of sub processes (see point 1) can confuse the Linux…
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In Phoronix Forum I have received feedback regarding the CPU time issue, as described below, see "CPU Usage Time Is Dependant on Load". Right now I use 3.2.0-38-generic #61-Ubuntu SMP Tue Feb 19 12:18:21 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux So maybe this behaviour is kernel dependant.…
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Press On/Off switch (right) and simultaneously press speaker volume button (left), voila, you've got your screenshot in Android. Here is an example from today.
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