To overcome the ever-increasing susceptibility to transient-fault in processors, various redundant multithreading （RMT） architectures have been proposed, which is becoming a most effective approach for detecting and...To overcome the ever-increasing susceptibility to transient-fault in processors, various redundant multithreading （RMT） architectures have been proposed, which is becoming a most effective approach for detecting and recovering from transient-fault. This paper surveys a wide range of RMT architectures-from the original AR-SMT（A-stream R-stream Simultaneous MultiThreading） to the most-recent SD-SRT （Slack-Decode Simultaneous Redundant Threading）, presenting traverse analyses and comparisons among them, and hereby demonstrates its evolution and tendency. Finally, some directions and suggestions are put forward for the further RMT research and development.展开更多
Slack-Decode Simultaneously and Redundantly Threaded （SD-SRT） is proposed for detecting transient faults in processors. SD-SRT boosts the previously proposed SRT performance via definitely eliminating redundant inst...Slack-Decode Simultaneously and Redundantly Threaded （SD-SRT） is proposed for detecting transient faults in processors. SD-SRT boosts the previously proposed SRT performance via definitely eliminating redundant instructiou fetches. First, the fetch stage is moved out of the Spheres of Replication （SoR）, and a unified instruction-fetch-queue （IFQ） is exploited by both the leading and trailing threads. Second, a scheme called slack-decode cooperates with the unified IFQ to harmonize proceeding of the two threads. The simulations show that SD-SRT outperforms original SRT in terms of IPC by 15%, and decreases I-cache access by 42%. Meanwhile, SD-SRT leads to a lessened size and complexity for hardware structures such as load-value-queue and store-buffer.展开更多
基金Supported by the National Natural Science Foun-dation of China (60503015)
文摘To overcome the ever-increasing susceptibility to transient-fault in processors, various redundant multithreading （RMT） architectures have been proposed, which is becoming a most effective approach for detecting and recovering from transient-fault. This paper surveys a wide range of RMT architectures-from the original AR-SMT（A-stream R-stream Simultaneous MultiThreading） to the most-recent SD-SRT （Slack-Decode Simultaneous Redundant Threading）, presenting traverse analyses and comparisons among them, and hereby demonstrates its evolution and tendency. Finally, some directions and suggestions are put forward for the further RMT research and development.
文摘Slack-Decode Simultaneously and Redundantly Threaded （SD-SRT） is proposed for detecting transient faults in processors. SD-SRT boosts the previously proposed SRT performance via definitely eliminating redundant instructiou fetches. First, the fetch stage is moved out of the Spheres of Replication （SoR）, and a unified instruction-fetch-queue （IFQ） is exploited by both the leading and trailing threads. Second, a scheme called slack-decode cooperates with the unified IFQ to harmonize proceeding of the two threads. The simulations show that SD-SRT outperforms original SRT in terms of IPC by 15%, and decreases I-cache access by 42%. Meanwhile, SD-SRT leads to a lessened size and complexity for hardware structures such as load-value-queue and store-buffer.
