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Migrating a WordPress Blog from Apache2 to Nginx

This blog is hosted on a Linode VPS with 512 MB RAM and running Ubuntu 11.10. Up until today, Apache2 was the web server, and it worked fine except sometimes, it reached connection and memory limits, and the blog would go offline for a short period of time, especially right after a new blog post. So this week-end, I decided to switch to nginx (pronounced engine-x) web server which is said to use less memory than Apache2. Let me know if something suddenly stopped working… nginx is a relatively recent web server, and the documentation on the web seems to become outdated pretty fast, so I’ve decided to document what I’ve done. The first thing I would recommend is to try it in your own local server first,  and make sure most things are working including plugins. Testing your WordPress blog with nginx in a local server I run Ubuntu […]

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Ubuntu 12.04 Server ARMHF Image for Mele A1000/A2000

I’ve seen quite a few people who want to use the Mele A1000 – or its brother the Mele A2000 – media player as a server (Sacrilege!). Since recent ARM servers are running Ubuntu 12.04, and Tom Gall has (conveniently) posted the live-build config necessary to generate Ubuntu 12.04 Server image this week, I thought I’d give it a try on Mele A1000. The image generated is a headless system running Apache 2 and sshd (openssh_server). I’ll detail the steps I followed to generate this image first, so if you just want to try the SD card image, scroll down at the end of the post. The first step is to generate Ubuntu Linaro Server rootfs, by following the Live-Build instructions on Linaro website together with Tom’s live build config. I’ve followed those steps in a machine running Ubuntu 12.04. Let’s install the required packages:

Configure the build and […]

Khadas Edge2 Arm mini PC
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Group Buy – Get CX-01 Android 4.0 mini PC for 39.99 USD

togetho.ru is a an online community that organizes group buys for interesting gadgets, and one reader informed me they already did successful group buying for mobile devices such as Hyundai A7HD, SmartQ Ten3, and Freelander PD10 tablets and ThL V9 smartphone. They now opened group-buying subscription for CX-01 Android 4.0 mini PC powered by a dual core Cortex A5 processor (Telechips TCC8923) and plan to offer the device for $39.99 including international shipping via China Mail. It’s also possible to upgrade to Hong Kong Post or other shipping methods. You do not actually buy via togetho.ru, but you just need to register an email address, and if there is enough demand, they will be able to send a coupon to your email so that you can use it in Pandawill. The CX-01 HDMI stick should have performance similar to MK802 based on Antutu benchmarks for devices built around TCC8923, especially […]

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Tizen Launches Development Unit Program for Developers

The Tizen development team  showcased and gave away Tizen development hardware at the Tizen Conference in May, which are similar to the Samsung Galaxy S2. If you were not present, do not despair as Tizen has just announced the launch of a Development unit program in order to make it easier for qualified developers to find available development hardware running Tizen. The 30 units currently available  are only useful for Tizen developers, since they do not contain all of the features that you would expect to see in a consumer device and are only intended to developers who are building applications for Tizen. If you are a developer willing to working on Tizen Apps, you can apply for this batch until June 29 at 11:59 pm PST by filling the application form (After logging-in which appears to be impossible right now). To be eligible, you can’t work for the handset […]

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Freescale Announces Availability of Kinetis L Series Cortex M0+ MCU and Freedom Devkit

ARM unveiled its ultra-low power Cortex-M0+ core back in March, and Freescale and NXP also announced their plans to use this new core in some of their micro-controllers destined to power the internet of things. Yesterday at Freescale Technology Forum (FTF), Freescale announced the availability of alpha samples of its Kinetis L series. This new low power MCU family will allow existing 8-bit and 16-bit architecture to be replaced by 32-bit architecture without increasing power consumption, cost or size, and the company expects them to be used in devices such as small appliances, gaming accessories, portable medical systems, audio systems, smart meters, lighting and power control. The ARM Cortex-M0+ processor is said to consume about a third of the energy of any 8- or 16-bit processor, while delivering between two to 40 times more performance. Kinetis L series MCU  can consume as low as 50 uA/MHz in very-low-power run (VLPR) […]

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ARM vs x86 Servers Benchmark – Calxeda EnergyCore ECX-1000 vs Intel Xeon E3-1240

Calxeda has released the results of ApacheBench benchmark comparing their ARM-based EnergyCore solution to an Intel Xeon server in order to showcase the performance and the much lower power consumption of their servers. Here’s the setup: Hardware: Single Calxeda EnergyCore ECX-1000 @ 1.1 GHz, 4 GB of DDR3L-1066 memory, 1Gb Ethernet network port and 250 GB SATA 7200rpm HDD Intel Xeon E3-1240 @ 3.3 GHz, 16 GB memory and 1Gb Ethernet network port. No info on hard drive provided Software: Ubuntu Server v12.04 Apache Server v2.4.2 ApacheBench v2.3 (16k request size) They performed power measurements every 2 seconds and averaged the results. Power supply overhead and hard drive power consumption were not excluded in the measurement, but the entire SoC and DDR memory power consumption were included together. For the Intel server however, they could not measure directly, so they used published TDP values for the CPU (80 W) and I/O […]

Rockchip RK3568/RK3588 and Intel x86 SBCs
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Mele A1000/A2000 Android 4.0 Image Released

At last, a (semi-)official Android 4.0 release (and not a beta) for Mele A1000 and Mele A2000 media players has been released. This release is based on AllWinner Android 4.0 SDK. You can download homlet_4.0_v1.0_20120609_dd.img.lzma or here and dump it to the SD card with dd (Linux) and Win32DiskImager (Windows). It is also available via Bittorrent. There is also another image named homlet_4.0_v1.0_20120609.img.lzma that can be flashed via the Phoenix Utility, but the download link is not available anymore at the moment. Here are the instructions in Linux:

Where you need to replace X in /dev/sdX by the correct letter for your SD card reader. Now insert the SD card in your Mele, and wait until the LED stops blinking, remove the SD card and restart the device. Et voila! The default language is Chinese, so you’ll have to go to the Settings to change the language to your […]

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Getting Started with Emcraft Systems Cortex M3/M4 Starter Kits Running uCLinux

A few months ago, I wrote a post about running uCLinux on Cortex M3/M4. Since then I’ve had the opportunity to play a with Cortex M3  & M4 boards capable of running Linux, as last week, I received Emcraft Systems Freescale K70 Starter Kit together with their MicroSemi (previously known as Actel) Smartfusion SoM. Today, I’ll show some pictures of the baseboard and modules I received in the kit, and some details about the documentation and how to get started with the modules. Unboxing Pictures Here’s the baseboard with Ethernet, USB interface using USB-UART bridge connected to the UART0, JTAG connectors (P3 and P5), two push-buttons and a breadboard for easy access to unused signals (ADC, I2C, SPI, UART and GPIOs). P4 and P6 are the sockets to plug in the SoM. There is a lithium-ion battery (CR2016) at the back of the board for the RTC clock. As previously […]

Khadas VIM4 SBC