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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Agrawal, A. Jain, P. Ansari, A. Torrellas, J. |
| Copyright Year | 2013 |
| Description | Author affiliation: Univ. of Illinois at Urbana-Champaign, Champaign, IL, USA (Agrawal, A.; Jain, P.; Ansari, A.; Torrellas, J.) |
| Abstract | As manycores use dynamic energy ever more efficiently, static power consumption becomes a major concern. In particular, in a large manycore running at a low voltage, leakage in on-chip memory modules contributes substantially to the chip's power draw. This is unfortunate, given that, intuitively, the large multi-level cache hierarchy of a manycore is likely to contain a lot of useless data. An effective way to reduce this problem is to use a low-leakage technology such as embedded DRAM (eDRAM). However, eDRAM requires refresh. In this paper, we examine the opportunity of minimizing on-chip memory power further by intelligently refreshing on-chip eDRAM. We present Refrint, a simple approach to perform fine-grained, intelligent refresh of on-chip eDRAM multiprocessor cache hierarchies. We introduce the Refrint algorithms and microarchitecture. We evaluate Refrint in a simulated manycore running 16-threaded parallel applications. We show that an eDRAM-based memory hierarchy with Refrint consumes only 30% of the energy of a conventional SRAM-based memory hierarchy, and induces a slowdown of only 6%. In contrast, an eDRAM-based memory hierarchy without Refrint consumes 56% of the energy of the conventional memory hierarchy, inducing a slowdown of 25%. |
| Starting Page | 400 |
| Ending Page | 411 |
| File Size | 5117650 |
| Page Count | 12 |
| File Format | |
| ISBN | 9781467355858 |
| ISSN | 15300897 |
| e-ISBN | 9781467355872 |
| DOI | 10.1109/HPCA.2013.6522336 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-02-23 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Abstracts Clocks Program processors Arrays |
| Content Type | Text |
| Resource Type | Article |
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