rick@wcwvax.UUCP (Richard Filipkiewicz) (05/09/86)
This is just a request for information. Does anybody know of
Transputer system running in a virtual memory environment? The
reason I ask is that from the hardware spec. there does not seem
to be an explicit abort or bus error pin. Perhaps you could use
the EVENT pin if it stops the currently executing process fast
enough. A more general version of this question is how to run parallel
machines in virtual memory.
Another, completely unrelated, question : Where can I get info. on
the MIPS risc chip either here in the U.K. or from the U.S.
Post any replies either to this group or e-mail to
....seismo!mcvax!ukc!wcwvax!rickkludge@gitpyr.UUCP (Scott Dorsey) (05/16/86)
In article <793@wcwvax.UUCP> rick@wcwvax.UUCP (Richard Filipkiewicz) writes: >This is just a request for information. Does anybody know of >Transputer system running in a virtual memory environment? The >reason I ask is that from the hardware spec. there does not seem >to be an explicit abort or bus error pin. Perhaps you could use >the EVENT pin if it stops the currently executing process fast >enough. A more general version of this question is how to run parallel >machines in virtual memory. Because the Transputer does not allow easy implementation of virtual memory on the PE, it must be performed by taking advantage of the existance of multiple PE's. I have seen a system whereby there were three classes of memory: memory local to the processor, mass storage (accessed via a mass-storage server PE), and common memory. Common memory is stored on one PE which has a large amount of memory and a high-speed disk. If an area of common memory is needed, it is swapped in, and the block of memory (segment??) that has lain unused for the longest time (and doesn't have the sticky bit set) is swapped out. The system actually resembles caching more than true virtual memory, but unusual systems require unusual methods. -- ------- Disclaimer: Everything I say is probably a trademark of someone. But don't worry, I probably don't know what I'm talking about. Scott Dorsey " If value corrupts kaptain_kludge then absolute value corrupts absolutely" ICS Programming Lab (Where old terminals go to die), Rich 110, Georgia Institute of Technology, Box 36681, Atlanta, Georgia 30332 ...!{akgua,allegra,amd,hplabs,ihnp4,seismo,ut-ngp}!gatech!gitpyr!kludge
hoffman@hdsvx1.UUCP (05/24/86)
Sorry to ask such a basic question, but what the hack *is* a transputer? hoffman%hdsvx1@slb-doll.csnet "The ignorance expressed here in no way reflects upon the ignorance of my employers..."