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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Robatmili, B. Dong Li Esmaeilzadeh, H. Govindan, S. Smith, A. Putnam, A. Burger, D. Keckler, S.W. |
| Copyright Year | 2013 |
| Description | Author affiliation: Univ. of Washington, Seattle, WA, USA (Esmaeilzadeh, H.) || Univ. of Texas at Austin, Austin, TX, USA (Dong Li; Keckler, S.W.) || Qualcomm Res. Silicon Valley, CA, USA (Robatmili, B.) |
| Abstract | Dynamic multicore architectures, that fuse and split cores at run time, potentially offer a level of performance/energy agility that static multicore designs cannot achieve. Conventional ISAs, however, have scalability limits to fusion. EDGE-based designs offer greater scalability but to date have been performance limited by significant microarchitectural bottlenecks. This paper addresses these issues and makes three major contributions. First, it proposes Iterative Path Prediction to address low next block prediction accuracy and low speculation rates. It achieves close to taken/not-taken prediction accuracy for multi-exit instruction blocks while also speculating the predicated execution path within the block. Second, the paper proposes Exposed Operand Broadcasts to address the overhead of operand delivery for high fanout instructions by exposing a small number of broadcast operands in the ISA. Third, we present a scalable composable architecture called T3 that uses these mechanisms and show it can operate across a wide range of power and performance spectrum by increasing energy efficiency and performance significantly. Compared to previous EDGE designs, T3 improves energy efficiency by about 2x and performance by up to 50%. |
| Starting Page | 460 |
| Ending Page | 471 |
| File Size | 1476823 |
| Page Count | 12 |
| File Format | |
| ISBN | 9781467355858 |
| ISSN | 15300897 |
| e-ISBN | 9781467355872 |
| DOI | 10.1109/HPCA.2013.6522341 |
| 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 | Registers Multicore processing Microarchitecture Accuracy Out of order History |
| Content Type | Text |
| Resource Type | Article |
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