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- From: preston@dawn.cs.rice.edu (Preston Briggs)
- Subject: Re: IBM's FIRST RISC System/6000(tm) based Shared Memory Parallel Processor
- Message-ID: <BzB9uw.2IH@rice.edu>
- Sender: news@rice.edu (News)
- Organization: Rice University, Houston
- References: <lifvl6INNan3@exodus.Eng.Sun.COM>> <CLIFFC.92Dec11101344@dawn.rice.edu> <9235018.14855@mulga.cs.mu.OZ.AU>
- Date: Tue, 15 Dec 1992 17:28:08 GMT
- Lines: 32
-
-
- >> We describe an efficient software cache consistency mechanism for shared
- >> memory multiprocessors that supports multiple writers and works for
- >> cache lines of any size. Our mechanism relies on the fact that, for a
- >> correct program, only the global memory needs a consistent view of the
- >> shared data between synchronization points. Our delayed consistency
- >> mechanism allows arbitrary use of data blocks between synchronizations.
-
- >cliffc@rice.edu (Cliff Click) writes:
- >>This sounds like an paraphrase of Ervan Darnell's thesis proposal here
- >>at Rice.
-
- zs@munta.cs.mu.OZ.AU (Zoltan Somogyi) writes:
- >This idea is quite old. It was the subject of a tech report six years ago:
- >
- >%A D. Abramson
- >%A K. Ramamohanarao
- >%A M. Ross
- >%T A software controlled cache coherence policy,
- >using selectively clearable cache memories
- >%R Technical Report 86/18
- >%I Department of Computer Science, University of Melbourne
- >%C Melbourne, Australia
- >%D 1986
-
- In defense of Ervan's work:
- He's exploring compiler optimization to lower the cost of maintaining
- cache coherence via software. Presumably, machines like IBM's will
- benefit from his efforts (and the efforts of all the other people
- working in the same direction).
-
- Preston Briggs
-