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 6:21:38 PM
The fast boot time is from power down/off state, not from a restart:
Also, choosing Restart from the UI will do a full shutdown, followed by a cold boot.
The power down creates the hiberfile that the subsequent startup reads. Restart does not seem to do this.
9/10/2011 1:54:24 PM
I was just thinking, if there is no full-shutdown button and "shutdown /full" command is the only way to do it, then non-power users would have a lot of problems installing drivers and programs that require a full shutdown.
Apparently microsoft were smart enough not to change the restart procedure.
"A politician stumbles over himself... Then they pick it out. They edit it. He runs the clip, and then he makes a funny face, and the whole audience has a Pavlovian response." -- Joe Scarborough on John Stewart over Jim Cramer
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
Microsoft's HD-500 ("Display Dock"), the Magic Sauce Behind Continuum
October 6, 2015, 5:30 PM
Quick Note: Windows 10 Hits 110 Million Devices, VMs
October 6, 2015, 4:30 PM
Windows 10 on Raspberry Pi, IoT Devices Sees Developer Debut
August 12, 2015, 2:41 PM
Sony Issues Bizzare "Do Not Update" Edict to VAIO PC Owners
August 11, 2015, 9:42 PM
Report: Over 25 Million Devices Upgraded to Windows 10... or Was It 67 Million?
August 7, 2015, 3:24 PM
EA Set to Milk the Star Wars Cash Cow w/ Video Games
July 31, 2015, 12:36 PM
Most Popular Articles
Why the U.S. Won't be Able to Ban Google's New Huawei Marshmallow Flagship Phone
October 3, 2015, 5:27 PM
Apple's First Fixes to iOS 9 Land w/ iOS 9.0.1 Release
September 23, 2015, 6:11 PM
Apple Watch Commands 2 in 3 Smart Watch Sales, WatchOS 2 Sweetens the Pitch
September 20, 2015, 6:07 PM
Tag Heuer Admits Its $1,800 Smartwatch Was Inspired By Apple -- Price-Wise
September 30, 2015, 6:32 PM
Breaking Bad: How to Crash Google's Chrome Browser With Just 8 Characters
September 23, 2015, 11:08 AM
Latest Blog Posts
Sceptre Airs 27", 120 Hz. 1080p Monitor/HDTV w/ 5 ms Response Time for $220
Dec 3, 2014, 10:32 PM
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
More Blog Posts
Copyright 2015 DailyTech LLC. -
Terms, Conditions & Privacy Information