Name
Abstract | ||
|---|---|---|
This paper presents NoSQ (short for No Store Queue), a microarchitecture that performs store-load communication without a store queue and without executing stores in the out- of-order engine. NoSQ implements store-load communication using speculative memory bypassing (SMB), the dynamic short-circuiting of DEF-store-load-USE chains to DEF-USE chains. Whereas previous proposals used SMB as an opportu- nistic complement to conventional store queue-based forward- ing, NoSQ uses SMB as a store queue replacement. NoSQ relies on two supporting mechanisms. The first is an advanced store-load bypassing predictor that for a given dynamic load can predict whether that load will bypass and the identity of the communicating store. The second is an effi- cient verification mechanism for both bypassed and non- bpyassed loads using in-order load re-execution with an SMB- aware store vulnerability window (SVW) filter. The primary benefit of NoSQ is a simple, fast datapath that does not contain store-load forwarding hardware; all loads get their values either from the data cache or from the register file. Experiments show that this simpler design—despite being more speculative—slightly outperforms a conventional store- queue based design on most benchmarks (by2% on average). |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1109/MM.2007.17 | Orlando, FL |
Keywords | Field | DocType |
store-load forwarding hardware,store-load communication,dynamic load,nonbpyassed load,store queue replacement,in-order load re-execution,smbaware store vulnerability window,advanced store-load,store queue,conventional store,risc,out of order,parallel programming,cisc,computer architecture,register file,microarchitecture | Datapath,Computer science,Dynamic load testing,Queue,Parallel computing,Register file,Real-time computing,Complex instruction set computing,Storage management,Data cache,Operating system,Microarchitecture | Journal |
Volume | Issue | ISSN |
27 | 1 | 1072-4451 |
ISBN | Citations | PageRank |
0-7695-2732-9 | 29 | 1.08 |
References | Authors | |
22 | 3 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| tingting sha | 1 | 83 | 3.20 |
| Milo M. K. Martin | 2 | 2677 | 125.22 |
| Amir Roth | 3 | 757 | 41.65 |