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SBACPAD
2015
IEEE

i-MIRROR: A Software Managed Die-Stacked DRAM-Based Memory Subsystem

5 years 7 months ago
i-MIRROR: A Software Managed Die-Stacked DRAM-Based Memory Subsystem
This paper presents an operating system managed diestacked DRAM called i-MIRROR that mirrors high locality pages from the off-chip DRAM. Optimizing the problems of reducing cache tag area, reducing transfer bandwidth and improving hit latency altogether while using the die-stacked DRAM as hardware cache is extremely challenging. In this paper, we show that performance and energy efficiency can be obtained by software management of the die-stacked DRAM, which eliminates the need for tags, the source of aforementioned problems. In the proposed scheme, the operating system loads pages from disks to the die-stacked DRAM on a page fault at the same time as they are loaded to the off-chip DRAM. Our scheme maintains the pages in the off-chip and the die-stacked DRAM in a synchronized/mirrored state by exploiting the parallel loading capability to the die-stacked and off-chip DRAM from the disk. This eliminates the need for physical page movement to the slower off-chip DRAM upon eviction fro...
Jee Ho Ryoo, Karthik Ganesan, Yao-Min Chen, Lizy K
Added 17 Apr 2016
Updated 17 Apr 2016
Type Journal
Year 2015
Where SBACPAD
Authors Jee Ho Ryoo, Karthik Ganesan, Yao-Min Chen, Lizy Kurian John
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