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CPU Power Management: CPUIDLE

Linux Kernel cpuidle subsystem architecture

CNXSoft: This is a guest post by Daniel Thompson, Principal Software Engineer at RISCtar Solutions, about Linux CPU power management for embedded systems, specifically covering cpuidle in depth. Twenty years ago, it was easy for an operating system kernel to go idle: when there were no tasks to run, “the idle loop” would be scheduled. Early idle loops were basically empty infinite loops that did nothing while waiting for the next interrupt to happen. This saved power simply by avoiding running instructions that needed power-hungry components such as the cache or FPU! Over time, changing technology has allowed multiple additional hardware mechanisms to reduce power to be introduced. With these new options available today, the idle loop is responsible for choosing and deploying the “best” way to go idle. As a brief reminder, entering and returning from an idle state has a cost, and that cost can be measured both […]

The post Idle CPU power management: cpuidle appeared first on CNX Software – Embedded Systems News.

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Revolut’s IPO is two years away, and it’ll be in the US

The CEO of Europe’s most valuable startup gave his clearest IPO timeline yet in a Bloomberg interview, narrowing his December ‘two to three years’ estimate to ‘two years.’ It came as Revolut marked the biggest regulatory milestone in its history and filed for a US bank charter, both developments that make an eventual listing meaningfully […]

This story continues at The Next Web

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AI Security Camera with IP67 Rating Featuring Rockchip RV1126B or RK3576/J/M SoC for Commercial, Industrial, and Automotive Use – CNX Software

Firefly CQ38W 1126B and CQ38W 3576 AI smart security cameras

Back in January 2024, Firefly released the CT36L AI smart security cameras, built around the Rockchip RV1106G2 SoC with a 0.5 TOPS NPU and Power over Ethernet (PoE) support. Now, Firefly has introduced two new AI cameras, the CQ38W-1126B and CQ38W-3576, which use a similar IP67-rated enclosure but come with much more powerful processors. Both new models no longer support PoE and instead use a 12V DC input, and they also add an RS485 interface. In terms of performance, the CQ38W-1126B is built around the Rockchip RV1126B with a 3 TOPS NPU and can run small multimodal AI models. The higher-end CQ38W-3576 features an octa-core Rockchip RK3576 with a 6 TOPS NPU, making it suitable for more demanding AI workloads, including YOLO and large language models. Both cameras are available with 3MP or 5MP sensors and come in Commercial or Industrial (J-suffix) variants. The 3576 series also adds an Automotive-grade […]

The post IP67-rated AI security camera feature Rockchip RV1126B or RK3576/J/M SoC for commercial, industrial, and automotive applications appeared first on CNX Software – Embedded Systems News.

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AI Security Camera with IP67 Rating Featuring Rockchip RV1126B or RK3576/J/M SoC for Commercial, Industrial, and Automotive Use - CNX Software
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Frequently Violated Email Etiquette Guidelines

Gmail provides functionalities that simplify the organization of your extensive list of unread messages. However, beyond maintaining a neat inbox, it’s crucial to understand how to compose a well-crafted, professional email – a significant aspect of this is grasping email etiquette.

Similar to the unwritten rules of phone etiquette that people frequently overlook, there are certain expectations when sending an email that can facilitate achieving your goals if adhered to. Most likely, you’ll be reaching out to potential employers or clients via emails that must convey politeness, particularly if you’re making an unsolicited introduction.

Messages intended for friends and family naturally allow for more leniency, yet regardless of your audience, there are optimal practices to effectively convey your message. These practices include tailoring your writing for the recipient, steering clear of any content that might make your email appear suspicious, and recognizing the right moments to delay and follow up.

Crafting Emails for Your Audience

Writing for your recipient image

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Possible Disadvantages of Utilizing a Roku with a Display

Roku Streaming Stick Plus. This eliminates the concern of having a spare HDMI cable available — simply connect the streaming device to an HDMI input and plug it into an AC outlet or USB port for power. Provided that the display being used has an available HDMI port, the initial setup should be quite straightforward, aside from selecting a Wi-Fi network.

There aren’t many cons to utilizing any of the major streaming devices nowadays, but one potential problem you might encounter is audio — or rather, the absence of it — when linking a Roku or Fire TV Stick to a computer monitor. Unlike televisions and projectors, it is much more typical to find a monitor that offers remarkable picture quality yet has no built-in speakers. This isn’t a design choice specific to brands; monitor manufacturers like HP, Asus, Acer, and others are all culpable.

For those who primarily use computer monitors for word processing and other PC-oriented activities, the lack of speakers may not be significant. However, if your intention was to connect your Roku streaming device for movie and show viewing, you are likely to experience no sound. Luckily, there is a very useful workaround, and it’s entirely free. There is also a second workaround that comes at a cost.

Roku’s Headphone Mode is the champion (with a USB soundbar as a close second)

<div class="slide-key image-holder gallery-image-holder credit-image-wrap " data-post-url="https://www.bgr.com/2138387/drawback-using-roku-on-monitor/" data-post-title="There Might Be A Draw

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