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The complexity of explicit parallel programming greatly limits programmers to achieve further performance gain in chip-multiprocessors (CMPs). To simplify software programming for large scale CMPs, we present a task-level superscalar microarchitecture which acts as the Control Processor (CP) of the Multi-Level Computing Architecture (MLCA), a novel multicore architecture especially targeted for embedded...
As microprocessors begin to leverage multi-core functionality, the power consumption incurred from tag comparison in cache hierarchy of Chip Multi-Processors (CMPs) becomes more prevalent. In this paper, a novel two-level cache architecture is explored to reduce the tag comparisons for mitigating power overhead. For one thing, a way-tagged L1 cache is adopted to access the L2 cache as a direct-mapping...
A SDRAM like conventional memories can be affected by the occurrence of single event upsets (SEUs) which can lead to serious faults such as single-bit error. In order to cope with this effect of SEUs, a fault-tolerant SDRAM controller is proposed instead of previous approaches that required modifications to the internal structure of the SDRAM itself. For one thing, an optimized encoder and decoder...
For the space application, error detection and correction (EDAC) technique is often adopted to protect memory cells against Single Event Upset (SEU) errors. To improve the EDAC ability and in view of the parity memory having 8 bits width, a single error correction and double error detection (SEC-DED) (40,32) Hamming code is proposed. This scheme is on the base of (39,32) Hsiao code, adding a check...
A content addressable memory (CAM) like conventional memories can be affected by the occurrence of single event upsets (SEUs) to cause different effects. In this paper, a fault-tolerant strategy proposed at system level can be applied to a CAM used as the coherence directory in the context of multiprocessor. For one thing, with the combined use of an interleaved parity bits protection scheme, a probabilistic...
Register renaming is an indispensable technique to cope with false data dependencies in out-of-order processors. The critical component for performing register renaming is a register alias table (RAT), which maintains the mappings between architecture and physical registers. Unfortunately, a potential misprediction may seriously slower the processor execution, because new instructions are not allowed...
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