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- Path: sparky!uunet!elroy.jpl.nasa.gov!nntp-server.caltech.edu!toddpw
- From: toddpw@cco.caltech.edu (Todd P. Whitesel)
- Newsgroups: comp.sys.apple2
- Subject: Re: RamFAST & GS/OS cache
- Date: 22 Nov 1992 00:55:13 GMT
- Organization: California Institute of Technology, Pasadena
- Lines: 19
- Message-ID: <1emlphINNrg8@gap.caltech.edu>
- References: <fmlin.2ami@terapin.com> <By39x5.7Jv@news.iastate.edu>
- NNTP-Posting-Host: punisher.caltech.edu
-
- hal@budapest.math.macalstr.edu (Harold Byron Bouma) writes:
-
- >> I am going to bug Drew to support GS/OS cache :)
-
- > Good, you should. Its much better caching and the GS will improve from
- >it. Even the Turbo IDE card does it as well.
-
- Drew's position on this is that the method the RamFast currently uses is faster
- than it would be if he supported GS/OS caching. This is because the GS/OS cache
- has to (a) find the block by searching a list, and (b) manually move the block
- to the caller. So for data blocks the GS/OS cache is generally going to be
- slower than the RamFast unless you have a very fast Zip. But for directory
- blocks, the GS/OS cache makes a lot of sense _IF_ the FST's are smart enough
- to directly search for them in the cache rather than calling the driver and
- forcing a manual copy into the FST's own memory (which is also usually going to
- be slower than just blasting the block in from the RamFast).
-
- Todd Whitesel
- toddpw @ cco.caltech.edu
-