Released on: 15, March 2007
, Author: Handy Software Lab
, Audience: Software related
Windows XP has a Prefetcher component, which shortens theamount of time it takes to start Windows and programs. When trouble shooting either Windows or program start-up issues, it might be helpful to disable the prefetcher usingHSLAB Prefetch Manager, because it runs as a background service while otherapplications are running or loading. When a Windows XP system is booted, data is saved about all logical disk readoperations. On later boots, this information is used to prefetch these files inparallel with other boot operations. During boot and application launch, a Windowssystem demands and pages a sizable amount of data in small chunks (4 KB to 64 KB),seeking between files, directories, and metadata. The Logical Prefetcher, which isnew for Windows XP, brings much of this data into the system cache with efficientasynchronous disk I/Os that minimize seeks. During boot, the Logical Prefetcherfinishes most of the disk I/Os that need to be done for starting the system inparallel to device initialization delays, providing faster boot and logonperformance. Logical prefetching is accomplished by tracing frequently accessed pages insupported scenarios and efficiently bringing them into memory when the scenario islaunched again. When a supported scenario is started, the transition page faultsfrom mapped files are traced, recording which page of a file is accessed. When thescenario has completed (either the machine has booted or the application started),the trace is picked up by a user-mode maintenance service, the Task Scheduler. Theinformation in the trace is used to update or create a prefetch-instructions filethat specifies which pages from which files should be prefetched at the next launch.
Software home page: http://www.hs-lab.com/products /sp/Software download: http://www.hs-lab.com/download s/hslab-prefetch-manager.exeS oftware screenshot: http://www.hs-lab.com/screensh ots/sp-l.gif
Source: Express-Press-Release.com
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