Windows 8 "Hybrid" Boot Promises Drastically Faster "Cold" Boots
September 9, 2011 4:40 PM
comment(s) - last by
Windows 7 metrics show most power transitions are cold boots (green) with power-consuming sleeps (blue) in second place. A few people use hibernate (fuschia) as an alternative to sleep, but this uses a great deal of storage.
Boot Times on Windows 8 (dark blue) are across the board faster than boot times in Windows 7 (light blue), with the difference esp. noticeable in Windows 7 "worst case" scenarios.
Emily Wilson, program manager of the Windows 8 Kernel Group shows fast-booting Windows 8.
New tech caches the kernel and device drivers only, allowing much faster boots w/out much storage
Microsoft Corp. (
) has come up with a pretty slick solution for
, its upcoming operating system, which is set to
launch in late 2012
. The company realized that many Windows 7 customers (45 percent on the laptop, 57 percent on the desktop) prefer to do a full shutdown between each use. But wakeup times from full shutdown in Windows have traditional slow.
A small percentage of people hibernate their machines, which promises faster startup speeds, but requires storage space equivalent to the footprint in memory of your running applications (often 4 GB).
So what Microsoft devised was a hybrid method faster startups -- this time only storing information from the system kernel and the device drivers. The result is a much faster boot that still provides the power savings of cold boots and hibernation, but without the large amount of storage (often 4 GB or more) needed to store a complete image of all running programs. Microsoft estimates the average cold boot will be 30 to 70 percent faster using the technology.
Microsoft describes the steps to the shutdown side of this process in a
The user initiates a shutdown by selecting “shut down” from the Start menu, or by pressing the power button; or an application initiates shutdown by calling an API such as ExitWindowsEx() or InitiateShutdown().
Windows broadcasts messages to running applications, giving them a chance to save data and settings. Applications can also request a little extra time to finish what they’re doing.
Windows closes the user sessions for each logged on user.
Windows sends messages to services notifying them that a shutdown has begun, and subsequently shuts them down. It shuts down ordered services that have a dependency serially, and the rest in parallel. If a service doesn’t respond, it is shut down forcefully.
Windows broadcasts messages to devices, signaling them to shut down.
Windows closes the system session (also known as “session 0”).
Windows flushes any pending data to the system drive to ensure it is saved completely.
Windows sends a signal via the ACPI interface to the system to power down the PC.
The hybrid boot system pairs with
the Unified Extensible Firmware Interface (UEFI)
-- Microsoft's new replacement to the aged BIOS system -- for ultra-fast boot times, even from near-full sleeps.
Don't like the hybrid boot and want to do a traditional cold boot? Microsoft has made this easy enough for power users. They can do a traditional cold boot by typing "shutdown /full" from the command line. This allows drivers installers and other programs that require a complete cold boot to still work properly.
Microsoft has a video of the tech in action
. The company promises demos at its upcoming
in Anaheim, Calif., which begins on Sept. 13 and runs parallel to Intel Corp.'s (
Intel Developer Forum
(IDF) in San Francisco, Calif.
Last month Microsoft showed off
improved file management
in a similar video. Earlier shots off
the new ribbon-based Windows Explorer
leaked via iconic Windows bloggers Paul Thurrott and Rafael Rivera
This article is over a month old, voting and posting comments is disabled
9/9/2011 5:29:31 PM
I wonder about those of us who frequently update video drivers. Even if you update or switch drivers, will the install program or even Windows itself know when to do a traditional cold boot rather than hybrid?
9/9/2011 6:06:02 PM
It's not hard for windows to know when a driver has been updated and do the traditional cold boot. For other cases such as corrupted drivers, I think it would boot up using hybrid and if not successful, then boot up as a traditional cold boot.
"Intel is investing heavily (think gazillions of dollars and bazillions of engineering man hours) in resources to create an Intel host controllers spec in order to speed time to market of the USB 3.0 technology." -- Intel blogger Nick Knupffer
Microsoft Makes File Management Less Painful in Windows 8
August 25, 2011, 7:12 PM
Ballmer: Windows 8 Will Land in 2012, Pop up in Tablets
May 24, 2011, 2:49 PM
Windows 8 Early Build -- Explorer is Built Around Office 2007-like Ribbon
April 5, 2011, 12:03 PM
Reports: Windows 8 Microsoft's "Riskiest" Product, Lands in 2012
October 25, 2010, 10:30 AM
Say Bye to BIOS and Hello to PCs that Boot in Seconds With UEFI
October 4, 2010, 9:24 AM
Apple Replaces “FREE” Label with “GET” on App Downloads in iTunes App Store
November 19, 2014, 5:38 PM
Apple Releases OS X 10.10.1 Yosemite, iOS 8.1.1 Updates
November 17, 2014, 1:43 PM
Microsoft Rolls Out $199 “Work & Play Bundle” for Its Subscription Services
November 11, 2014, 11:18 AM
LG to Initiate Lollipop Upgrades for G3 Users in Poland This Week
November 10, 2014, 8:20 AM
Office for iPad Now Free to Use for All, Microsoft Readies Android Tablet Version
November 6, 2014, 10:06 AM
Quick Note: Lollipop Coming to HTC One M7, M8 Within Three Months
November 5, 2014, 10:32 AM
Most Popular Articles
Wal-Mart: Miss Thanksgiving, Get Xbox One + Master Chief Collection for $299
November 17, 2014, 9:40 PM
Nokia Lumia 635 LTE Windows Phone is Only $40 at Best Buy on Black Friday
November 18, 2014, 11:59 AM
Sweden Mulls Labelling "Sexist" Video Games in the Wake of Gamergate
November 17, 2014, 2:00 PM
It's Official: Twitter is Profitable "Junk"
November 16, 2014, 10:45 PM
Austrian Pilots Call Surface 3 Pro Flight Bag a "Dream Come True"
November 14, 2014, 2:00 PM
Latest Blog Posts
Costco Gives Employees Thanksgiving Off; Wal-Mart Leads "Black Thursday" Charge
Oct 29, 2014, 9:57 PM
"Bear Selfies" Fad Could Turn Deadly, Warn Nevada Wildlife Officials
Oct 28, 2014, 12:00 PM
The Surface Mini That Was Never Released Gets "Hands On" Treatment
Sep 26, 2014, 8:22 AM
ISIS Imposes Ban on Teaching Evolution in Iraq
Sep 17, 2014, 5:22 PM
Space Terrorism is a Looming Threat For the United States
Apr 23, 2014, 7:47 PM
More Blog Posts
Copyright 2014 DailyTech LLC. -
Terms, Conditions & Privacy Information