Advanced Computer Architecture Chapter 7.66
Beyond ccNUMA
COMA: cache-only
memory architecture
Data migrates into
local DRAM of CPUs where it is being used
Handles very large
working sets cleanly
Replacement from DRAM
is messy: have to make sure someone still has a copy
Scope for interesting
OS/architecture hybrid
System slows down if
total memory requirement approaches RAM available, since
space for replication is reduced
Examples: DDM,
KSR-1/2, rumours from IBM…