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TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20280312T030000 RDATE:20281105T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20290311T030000 RDATE:20291104T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20300310T030000 RDATE:20301103T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20310309T030000 RDATE:20311102T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20320314T030000 RDATE:20321107T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20330313T030000 RDATE:20331106T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20340312T030000 RDATE:20341105T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:fcab8a043a0c4f930594740114f4df26 CATEGORIES:PhD Defense CREATED:20190823T084023 SUMMARY:Virtual Memory for Next-Generation Tiered Memory Architectures LOCATION:CoRE A (301) DESCRIPTION;ENCODING=QUOTED-PRINTABLE:
Abstract :
Virtua l memory offers a simple hardware abstraction to programmers freeing them f rom the tedious process of manual memory management. However, the emergence of new memory technologies are posing problems for conventional virtual me mory. Homogeneous memory systems are being replaced by complex heterogeneou s systems with multiple memory devices with different latency, bandwidth, a nd capacity characteristics. These heterogeneous memory systems require fre quent data movement to take advantage of these different memory devices.
This work upgrad es virtual memory to effectively support heterogeneous memory systems. The goal is to provide high-performance data management and scalable address tr anslation coverage. To achieve the goal, this dissertation shows that modes t hardware and software changes are sufficient. It proposes three technique s -- a lightweight hardware address translation coherence approach; a high- throughput software page migration infrastructure; and OS support to defrag ment memory such that it becomes easier to generate large swaths of transla tion contiguity that can be covered with few TLB entries. In total, the con tribution of this dissertation is to identify bottlenecks in the existing v irtual memory systems, to profile the performance impacts of these bottlene cks, and to provide hardware and software solutions in the context of heter ogeneous memory systems.
DTSTAMP:20240328T161202Z DTSTART;TZID=America/New_York:20181210T140000 SEQUENCE:0 TRANSP:OPAQUE END:VEVENT END:VCALENDAR