[ut.ee] Cider Fri 27th: Distributed Shared Memory - Zhou

dunc@eecg.toronto.edu (Duncan Elliott) (10/24/89)

                Electrical Engineering Computer Group
                         Cider Seminar Series

                 Extending Distributed Shared Memory
                    to Heterogeneous Environments


                            Songnian Zhou
               Department of Computer Science and CSRI
                        University of Toronto

         Time: Friday, Oct. 27, 1989, 12:05 --- Place: GB 248

       Distributed shared memory  (DSM)  provides  the  threads  of  a
  parallel  application  running  on  the  hosts  of a loosely-coupled
  distributed system with a coherent, shared address  space,  so  that
  applications  may be developed as if for multiprocessor systems with
  physical shared memory. As a high-level mechanism  for  interprocess
  communication,  distributed  shared  memory  compares  favorably  to
  message passing or remote procedure calling in terms of the ease  of
  applications programming.

       In this talk, I will discuss our work in extending  distributed
  shared   memory   to  heterogeneous  environments,  as  a  means  of
  integrating  workstations  and  compute  servers   into   a   single
  distributed  system. I will describe our prototype heterogeneous DSM
  system   implemented   on   Sun   workstations   and   DEC   Firefly
  multiprocessor  workstations,  Mermaid.  The  rest  of the talk will
  focus on a series of measurement experiments we conducted to  assess
  the  overhead  of  DSM  in a heterogeneous environment, to study the
  performance of applications ported to Mermaid, and to  evaluate  the
  effects of the page sizes used for maintaining data coherency.

  This is joint work with  Michael  Stumm,  Tim  McInerney,  and  Dave

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