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- From: behrenss@hphalle6.informatik.tu-muenchen.de (Soenke Behrens)
- Subject: Re: RamFAST & GS/OS cache
- References: <1emlphINNrg8@gap.caltech.edu>
- Sender: news@Informatik.TU-Muenchen.DE (USENET Newssystem)
- Organization: Technische Universitaet Muenchen, Germany
- Date: Mon, 23 Nov 1992 12:26:54 GMT
- X-Newsreader: TIN [version 1.1 PL7]
- Message-ID: <1992Nov23.122654.13826@Informatik.TU-Muenchen.DE>
- Lines: 26
-
- Todd P. Whitesel (toddpw@cco.caltech.edu) wrote:
- : 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).
-
- Well, all I can give you is some experience: When copying a load of files, my
- RF's performance drops. The Turbo IDE, which uses GS/OS caching (but only
- for directory blocks and such) performs much better in that respect.
-
- Soenke
-
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