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- W589891618 abstract "Clustered VLIW embedded processors have become widespread due to benefits of simple hardware and low power. However, while some applications exhibit large amounts of instruction level parallelism (ILP) and benefit from very wide machines, others have little ILP, which wastes precious resources in wide processors. Simultaneous MultiThreading (SMT) is a well known technique that improves resource utilization by exploiting thread level parallelism at the instruction grain level. However, implementing SMT for VLIWs requires complex structures. CSMT (Clusterlevel Simultaneous MultiThreading) allows some degree of SMT in clustered VLIW processors. CSMT considers the set of operations that execute simultaneously in a given cluster (named bundle)as the assignment unit. All bundles belonging to a VLIW instruction from a given thread are issued simultaneously. To minimize cluster conflicts between threads, a very simple hardwarebased cluster renaming mechanism is proposed. The experimental results show that CSMT significantlyimproves ILP when compared with other multithreading approaches suited for VLIW.For instance, with 4 threads CSMT shows an average speedup of 113% over a single-thread VLIW architecture and 36% over Interleaved MultiThreading (IMT). In some cases, speedup can be as high as 228% over single thread architecture and 97% over IMT. Also CSMT for a 2-thread processor, achieves almost the same performance as IMT for a 4-thread processor and also outperforms it in some cases." @default.
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- W589891618 date "2007-07-01" @default.
- W589891618 modified "2023-09-27" @default.
- W589891618 title "Performance evaluation of CSMT for VLIW processors" @default.
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