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DTSTAMP:20181221T160730Z
LOCATION:C141/143/149
DTSTART;TZID=America/Chicago:20181114T113000
DTEND;TZID=America/Chicago:20181114T120000
UID:submissions.supercomputing.org_SC18_sess205_pap355@linklings.com
SUMMARY:Siena: Exploring the Design Space of Heterogeneous Memory Systems
DESCRIPTION:Paper\nGPUs, Memory, NVRAM, Performance, System Software, Tool
 s, Tech Program Reg Pass\n\nSiena: Exploring the Design Space of Heterogen
 eous Memory Systems\n\nPeng, Vetter\n\nMemory systems are crucial to the p
 erformance, power, and cost of high-performance computing systems. Recentl
 y, multiple factors are driving the need for more complex, deep memory hie
 rarchies. However, architects and customers are struggling to design memor
 y systems that effectively balance multiple, often competing, factors in t
 his large, multidimensional, and fast-moving design space. In this paper, 
 we systematically explore the organization of heterogeneous memory systems
  on a framework, called Siena. Siena facilitates quick exploration of memo
 ry architectures with flexible configurations of memory systems and realis
 tic memory workloads. We perform a design space exploration on 22 proposed
  memory systems using eight relevant workloads. Our results show that hori
 zontal organizations of memories can achieve higher performance than that 
 of vertical organizations when the distribution of memory traffic balances
  the performance gap between memories. However, the coupling effects throu
 gh shared resources and application behaviors could negate the advantage o
 f high-performance memory in horizontal organizations.
URL:https://sc18.supercomputing.org/presentation/?id=pap355&sess=sess205
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