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 instru...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 instruction 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
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 instruction 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.
