Messages in this thread | | | From | Nikita Danilov <> | Date | Tue, 24 Jan 2006 18:11:38 +0300 | Subject | Re: [RFC] VM: I have a dream... |
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Ram Gupta writes: > On 1/23/06, Nikita Danilov <nikita@clusterfs.com> wrote: > > > > > The unique feature that Mac OS X VM does have, on the other hand, is > > that it keeps profiles of access patterns of applications, and stores > > then in files, associated with executables. This allows to quickly > > pre-fault necessary pages during application startup (and this makes OSX > > boot so fast). > > This feature is interesting though I am not sure about the fast boot > part of OSX. > as at boot time these applications are all started first time. So > there were no access pattern as yet. They still have to be demand
That's the point: information about access patterns is stored in the file. So next time when application is started (e.g., during boot) kernel reads that file and pre-faults pages.
> paged. But yes later accesses may be faster. > > Thanks > Ram gupta
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