Channel 9 - Entries tagged with Inside Windows 8 Microsoft http://mschnlnine.vo.llnwd.net/d1/Dev/App_Themes/C9/images/feedimage.png Channel 9 - Entries tagged with Inside Windows 8 http://channel9.msdn.com/Tags/inside-windows-8 Channel 9 keeps you up to date with the latest news and behind the scenes info from Microsoft that developers love to keep up with. From LINQ to SilverLight – Watch videos and hear about all the cool technologies coming and the people behind them. http://channel9.msdn.com/Tags/inside-windows-8 en Sun, 19 May 2013 11:19:39 GMT Sun, 19 May 2013 11:19:39 GMT Rev9 8 1 25 Bruce Worthington: Power Efficiency in Windows 8 and Beyond In developing Windows 8, power efficiency was a primary engineering theme. This means that all aspects of the system were designed and developed with efficient power usage in mind. It's paid off—Windows 8 is the most power efficient version of Windows to date. 

In this video, Windows Development Lead Bruce Worthington, an OS power and performance expert who leads a team of engineers working on Windows power management fundamentals, sits down with us to share the story of power efficiency in Windows 8. The renewed focus on power has paid off and is evident across the Windows ecosystem—from Windows on tablets, notebooks, hybrids, and desktops to Windows running in the data center.

Huge thanks to Bruce for this excellent conversation!

Tune in.

]]> http://channel9.msdn.com/posts/Bruce-Worthington-Power-Efficiency-in-Windows-8-and-Beyond In developing Windows 8, power efficiency was a primary engineering theme. This means that all aspects of the system were designed and developed with efficient power usage in mind. It's paid off—Windows 8 is the most power efficient version of Windows to date. In this video, Windows Development Lead Bruce Worthington, an OS power and performance expert who leads a team of engineers working on Windows power management fundamentals, sits down with us to share the story of power efficiency in Windows 8. The renewed focus on power has paid off and is evident across the Windows ecosystem—from Windows on tablets, notebooks, hybrids, and desktops to Windows running in the data center.Huge thanks to Bruce for this excellent conversation! Tune in. 2164 http://channel9.msdn.com/posts/Bruce-Worthington-Power-Efficiency-in-Windows-8-and-Beyond Tue, 29 Jan 2013 21:28:25 GMT http://channel9.msdn.com/posts/Bruce-Worthington-Power-Efficiency-in-Windows-8-and-Beyond Charles Charles 3 http://channel9.msdn.com/posts/Bruce-Worthington-Power-Efficiency-in-Windows-8-and-Beyond/rss Kernel Operating System Power Power Management Windows 8 WindowsContent Inside Windows 8 Inside Windows 8: Prashant Ratanchandani - Telemetry and Performance A great deal of data is collected during the alpha and beta phases (aka the Developer Preview and the Customer Preview) of Windows. As with Windows 7, Windows 8 performance telemetry is invaluable for identifying performance bottlenecks and bugs in Windows running in the real world. 

There are sophisticated performance and reliability measurement systems inside Windows. PerfTrack is one of these and is instrumental for providing Windows team engineers with highly detailed performance data (how long an app took to launch, how long an app took to shutdown, how long it took Windows to standby, to resume, etc...). Here, we meet Prashant Ratanchandani, one of the developers who works tirelessly to build/fine tune telemetric measurement algorithms for Windows client (you can imagine there is an equally robust performance telemetry system in Windows 8 Server) and to analyze performance telemetry.

]]> http://channel9.msdn.com/posts/Inside-Windows-8-Prashant-Ratanchandani-Telemetry-and-Performance A great deal of data is collected during the alpha and beta phases (aka the Developer Preview and the Customer Preview) of Windows. As with Windows 7, Windows 8 performance telemetry is invaluable for identifying performance bottlenecks and bugs in Windows running in the real world. There are sophisticated performance and reliability measurement systems inside Windows. PerfTrack is one of these and is instrumental for providing Windows team engineers with highly detailed performance data (how long an app took to launch, how long an app took to shutdown, how long it took Windows to standby, to resume, etc...). Here, we meet Prashant Ratanchandani, one of the developers who works tirelessly to build/fine tune telemetric measurement algorithms for Windows client (you can imagine there is an equally robust performance telemetry system in Windows 8 Server) and to analyze performance telemetry. 1478 http://channel9.msdn.com/posts/Inside-Windows-8-Prashant-Ratanchandani-Telemetry-and-Performance Mon, 21 Jan 2013 20:37:16 GMT http://channel9.msdn.com/posts/Inside-Windows-8-Prashant-Ratanchandani-Telemetry-and-Performance Charles Charles 1 http://channel9.msdn.com/posts/Inside-Windows-8-Prashant-Ratanchandani-Telemetry-and-Performance/rss Kernel Performance PerfTrack Windows 8 WindowsContent Inside Windows 8 Inside Windows 8: Chris Stevens - Boot Environment Chris Stevens is a software developer on the Windows kernel team working on the Windows boot environment. Windows 8 boots faster than any other version of Windows. Why? How?

Chris begins with the fundamentals (so, if you don't know anything about the boot process or what actually happens when an OS like Windows starts up, then you will after watching this...) and then digs into how the boot experience/environment/process was has evolved in Windows 8.

Tune in!

]]> http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Chris-Stevens-Boot-Environment Chris Stevens is a software developer on the Windows kernel team working on the Windows boot environment. Windows 8 boots faster than any other version of Windows. Why? How? Chris begins with the fundamentals (so, if you don't know anything about the boot process or what actually happens when an OS like Windows starts up, then you will after watching this...) and then digs into how the boot experience/environment/process was has evolved in Windows 8. Tune in! 2474 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Chris-Stevens-Boot-Environment Mon, 14 Jan 2013 18:02:53 GMT http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Chris-Stevens-Boot-Environment Charles Charles 12 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Chris-Stevens-Boot-Environment/RSS Architecture Kernel Operating System Boot Windows 8 WindowsContent Inside Windows 8 Inside Windows 8: Jon Berry - Desktop Activity Moderator and Connected Standby Jon Berry, a veteran Windows engineer, digs into the new way Windows 8 manages processes to support the brave new world of Windows running on various CPU architectures including ARM and ATOM, which present an interesting set of technical challenges given the need to aggressively preserve energy when running—yet not fully running—while in a battery-powered state.

Jon owns the Desktop Activity Moderator (DAM), which, as the name implies, moderates desktop processes. The DAM is one of several new features in Windows 8 designed to ensure consistent, long battery life for devices that support connected standby.

Connected standby occurs when the device is powered on but the screen is turned off. In this power state, the system is technically always "on" (to support key scenarios like mail, VoIP, social networking, and instant messaging with Windows Store apps). It is analogous to the state a smart phone is in when the user presses the power button.  

As such, software (including apps and operating system software) must be well-behaved during connected standby. The DAM was created to suppress desktop app execution in a manner similar to the Sleep state. It does this by suspending or throttling desktop software processes across the system upon connected standby entry. This enables systems that support connected standby to deliver minimized resource usage and long, consistent battery life while enabling Windows Store apps to deliver the connected experiences they promise.

The DAM is a kernel mode driver that is loaded and initialized at system boot if the system supports connected standby. 

How does Windows 8 provide this always-on experience and not drain the battery in 10 minutes? What does the DAM actually do? How does it work? The DAM is part of a larger management system, which Jon also describes here. What is connected standby, exactly? Jon spends a lot of time at the whiteboard answering these and other questions. Thank you, Jon!

Tune in. Learn.

]]> http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Jon-Berry-Desktop-Activity-Moderator-and-Connected-Standby Jon Berry, a veteran Windows engineer, digs into the new way Windows 8 manages processes to support the brave new world of Windows running on various CPU architectures including ARM and ATOM, which present an interesting set of technical challenges given the need to aggressively preserve energy when running—yet not fully running—while in a battery-powered state. Jon owns the Desktop Activity Moderator (DAM), which, as the name implies, moderates desktop processes. The DAM is one of several new features in Windows 8 designed to ensure consistent, long battery life for devices that support connected standby. Connected standby occurs when the device is powered on but the screen is turned off. In this power state, the system is technically always "on" (to support key scenarios like mail, VoIP, social networking, and instant messaging with Windows Store apps). It is analogous to the state a smart phone is in when the user presses the power button.   As such, software (including apps and operating system software) must be well-behaved during connected standby. The DAM was created to suppress desktop app execution in a manner similar to the Sleep state. It does this by suspending or throttling desktop software processes across the system upon connected standby entry. This enables systems that support connected standby to deliver minimized resource usage and long, consistent battery life while enabling Windows Store apps to deliver the connected experiences they promise. The DAM is a kernel mode driver that is loaded and initialized at system boot if the system supports connected standby.  How does Windows 8 provide this always-on experience and not drain the battery in 10 minutes? What does the DAM actually do? How does it work? The DAM is part of a larger management system, which Jon also describes here. What is connected standby, exactly? Jon spends a lot of time at the whiteboard answering these and other questions. 2750 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Jon-Berry-Desktop-Activity-Moderator-and-Connected-Standby Mon, 07 Jan 2013 13:55:24 GMT http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Jon-Berry-Desktop-Activity-Moderator-and-Connected-Standby Charles Charles 5 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Jon-Berry-Desktop-Activity-Moderator-and-Connected-Standby/RSS Architecture Kernel Operating System Windows 8 WindowsContent Inside Windows 8 Inside Windows 8: Greg Colombo - Heap Manager The Windows heap manager has been around as long as Windows has, evolving with each release, getting faster, more reliable, and more secure. In Windows 8, the heap manager improves in two major areas: performance and security. In this video, Greg Colombo, a developer on the Windows kernel team working on the Windows heap manager, digs into the details. What are the changes that positively impact performance and security?

This conversation—conducted entirely at the whiteboard—provides enough introductory information to ensure that even if you have no idea what a heap manager is—or what the heap is, for that matter—you will after you watch this. The complexity in this discussion increases over time, but remains understandable all the way through. Greg is an excellent communicator! Huge thanks to Greg for taking the time to educate us.

Tune in. Learn.

 

]]> http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Greg-Colombo-Heap-Manager The Windows heap manager has been around as long as Windows has, evolving with each release, getting faster, more reliable, and more secure. In Windows 8, the heap manager improves in two major areas: performance and security. In this video, Greg Colombo, a developer on the Windows kernel team working on the Windows heap manager, digs into the details. What are the changes that positively impact performance and security?This conversation—conducted entirely at the whiteboard—provides enough introductory information to ensure that even if you have no idea what a heap manager is—or what the heap is, for that matter—you will after you watch this. The complexity in this discussion increases over time, but remains understandable all the way through. Greg is an excellent communicator! Huge thanks to Greg for taking the time to educate us.Tune in. Learn.   2488 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Greg-Colombo-Heap-Manager Tue, 18 Dec 2012 18:09:07 GMT http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Greg-Colombo-Heap-Manager Charles Charles 11 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Greg-Colombo-Heap-Manager/RSS Kernel Memory Windows 8 WindowsContent Inside Windows 8 Inside Windows 8: Pedro Teixeira - Thread pools Continuing with our series of conversations with engineers in Windows, we meet Pedro Teixeira, a software developer on the Windows kernel team (aka core OS) who has improved the Windows thread pools in Windows 8. Thread pools are thread management subsystems (user mode and kernel mode) where threads are created and queued for any number of arbitrary tasks (work) required by applications and services. As it turns out, there are some significant improvements to the thread pool pattern in Windows 8. Pedro takes the time necessary - at the whiteboard for the entire interview - to dig into the details, beginning with first principles. So, if you don't really know what a thread pool is, then you will after the first 5 minutes of this interview. As the conversation progresses, the complexity will increase, but will remain suitable for most user mode application developers. Speaking of user mode, much of the time in this interview is spent on the Windows 8 user mode thread pool. The kernel mode thread pool is addressed towards the end of the conversation.

In Windows 8, there is a new thread pool model and new thread creation policy. What is the new policy? How is the new user mode thread pool designed? How is it better than its predecessors? What does this all mean for developers?

Tune in. Learn. Huge thanks to Pedro for taking the time to dig in - and for explain things in such a clear way.

]]> http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Pedro-Teixeira-Thread-pool Continuing with our series of conversations with engineers in Windows, we meet Pedro Teixeira, a software developer on the Windows kernel team (aka core OS) who has improved the Windows thread pools in Windows 8. Thread pools are thread management subsystems (user mode and kernel mode) where threads are created and queued for any number of arbitrary tasks (work) required by applications and services. As it turns out, there are some significant improvements to the thread pool pattern in Windows 8. Pedro takes the time necessary - at the whiteboard for the entire interview - to dig into the details, beginning with first principles. So, if you don't really know what a thread pool is, then you will after the first 5 minutes of this interview. As the conversation progresses, the complexity will increase, but will remain suitable for most user mode application developers. Speaking of user mode, much of the time in this interview is spent on the Windows 8 user mode thread pool. The kernel mode thread pool is addressed towards the end of the conversation.In Windows 8, there is a new thread pool model and new thread creation policy. What is the new policy? How is the new user mode thread pool designed? How is it better than its predecessors? What does this all mean for developers? Tune in. Learn. Huge thanks to Pedro for taking the time to dig in - and for explain things in such a clear way. 3944 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Pedro-Teixeira-Thread-pool Fri, 07 Dec 2012 05:21:14 GMT http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Pedro-Teixeira-Thread-pool Charles Charles 16 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Pedro-Teixeira-Thread-pool/RSS Kernel threading Threadpool Windows 8 WindowsContent Inside Windows 8 Inside Windows 8: Arun Kishan - Windows App Model Arun Kishan digs into the low level details of Windows 8's new application model.

How has Process Lifetime Management (PLM) been reimagined in Windows 8? How does app suspension work, exactly, or, what happens when an app is no longer in the foreground and not closed? How much work can you do in the background when an app is suspended? Arun covers several topics here, so please do set aside some quality time. In return, you will gain new levels of deep understanding that will help you take advantage of the Windows Store App platform and build excellent modern Windows applications.

You've met Arun before, so you should be prepared for some very deep treatment of this new world for Windows and Windows developers. This is an excellent 400 level investigation of the core changes that support the new app model.

Huge thanks to Arun for another exceptional conversation and whiteboard session.

Tune in. Learn.

]]> http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Arun-Kishan-Windows-App-Model Arun Kishan digs into the low level details of Windows 8's new application model. How has Process Lifetime Management (PLM) been reimagined in Windows 8? How does app suspension work, exactly, or, what happens when an app is no longer in the foreground and not closed? How much work can you do in the background when an app is suspended? Arun covers several topics here, so please do set aside some quality time. In return, you will gain new levels of deep understanding that will help you take advantage of the Windows Store App platform and build excellent modern Windows applications.You've met Arun before, so you should be prepared for some very deep treatment of this new world for Windows and Windows developers. This is an excellent 400 level investigation of the core changes that support the new app model. Huge thanks to Arun for another exceptional conversation and whiteboard session. Tune in. Learn. 4063 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Arun-Kishan-Windows-App-Model Wed, 21 Nov 2012 20:08:51 GMT http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Arun-Kishan-Windows-App-Model Charles Charles 23 http://channel9.msdn.com/Shows/Going+Deep/Inside-Windows-8-Arun-Kishan-Windows-App-Model/RSS Architecture Arun Kishan Kernel whiteboard Windows 8 WinRT Windows Store App WindowsContent Inside Windows 8 Inside Windows 8: Martyn Lovell and Elliot H Omiya - The Windows Runtime Windows 8 introduces an application programming model for building new kinds of user mode apps called Windows Store Apps. The name reflects the new way users discover, download, purchase, rate, and install applications on Windows 8: The Windows Store.

On Windows 8, underneath this new application model is the Windows Runtime (WinRT for short), which provides an API and ABI as well as services for these modern Windows applications. WinRT is a security sandbox and an advanced execution environment. It enables efficient interoperation among very different language "projections"—so, JavaScript, for example, can seamlessly interact with C++. 

What is WinRT, exactly? Why is it designed the way it is? What's the history of WinRT? What are the primary goals of this new technology? How did the Windows engineering team arrive at the design and implementation of this new Windows user mode development platform? These are the key questions addressed in this conversation with Windows Runtime engineering leaders Martyn Lovell and Elliot H Omiya (we call him EHO). Elliot and Martyn are two of the original WinRT architects. Watch as they tell us how it was conceived, how it works, and why COM is such a big part of the equation (it's not your grandmother's COM, mind you. WinRT is a very different COM than classic COM). 

Huge thanks to Martyn and EHO for this excellent conversation.

Tune in.

]]> http://channel9.msdn.com/Blogs/Charles/Inside-Windows-8-Martyn-Lovell-and-Elliot-H-Omiya-The-Windows-Runtime Windows 8 introduces an application programming model for building new kinds of user mode apps called Windows Store Apps. The name reflects the new way users discover, download, purchase, rate, and install applications on Windows 8: The Windows Store.On Windows 8, underneath this new application model is the Windows Runtime (WinRT for short), which provides an API and ABI as well as services for these modern Windows applications. WinRT is a security sandbox and an advanced execution environment. It enables efficient interoperation among very different language "projections"—so, JavaScript, for example, can seamlessly interact with C++.  What is WinRT, exactly? Why is it designed the way it is? What's the history of WinRT? What are the primary goals of this new technology? How did the Windows engineering team arrive at the design and implementation of this new Windows user mode development platform? These are the key questions addressed in this conversation with Windows Runtime engineering leaders Martyn Lovell and Elliot H Omiya (we call him EHO). Elliot and Martyn are two of the original WinRT architects. Watch as they tell us how it was conceived, how it works, and why COM is such a big part of the equation (it's not your grandmother's COM, mind you. WinRT is a very different COM than classic COM). Huge thanks to Martyn and EHO for this excellent conversation. Tune in. 2841 http://channel9.msdn.com/Blogs/Charles/Inside-Windows-8-Martyn-Lovell-and-Elliot-H-Omiya-The-Windows-Runtime Mon, 12 Nov 2012 20:54:46 GMT http://channel9.msdn.com/Blogs/Charles/Inside-Windows-8-Martyn-Lovell-and-Elliot-H-Omiya-The-Windows-Runtime Charles Charles 9 http://channel9.msdn.com/Blogs/Charles/Inside-Windows-8-Martyn-Lovell-and-Elliot-H-Omiya-The-Windows-Runtime/RSS Architecture COM Platform Programming Windows 8 WinRT WindowsContent Inside Windows 8