TY - GEN
T1 - An NBTI-Aware Task Parallelism Scheme for Improving Lifespan of Multi-core Systems
AU - Chen, Yu Guang
AU - Lin, Yu Yi
AU - Lin, Ing Chao
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/3
Y1 - 2020/3
N2 - Task parallelism schemes with a multi-core system are widely used through various applications nowadays to obtain better throughput. Most of previous works will try to find maximum degree of parallelism (DOP) to achieve best performance. However, aging effects have become an unavoidable threat which may degrade system performance and even cause functional failure. We observe that if a task is always executed with maximum DOP, all cores may continuously suffer from the NBTI effect and wear out soon. On the other hand, if we can decrease DOP without causing task deadline violation, some cores may have opportunities to be power-gated and recover from the NBTI effect. In this paper, we propose a novel NBTI-Aware task parallelism framework for multi-core systems to realize such an idea. Our framework first prioritizes ready tasks based on its criticality and then decide best DOP of each task without causing timing violation. After that, a task-To-core mapping algorithm which considers both IR-drop and core utilization is proposed. Finally, a recover decision algorithm is used to find the suitable recover mode of each core. Experimental results show that the proposed NBTI-Aware task parallelism framework can successfully extend system lifetime to 3.7 times compared with MAX DOP method.
AB - Task parallelism schemes with a multi-core system are widely used through various applications nowadays to obtain better throughput. Most of previous works will try to find maximum degree of parallelism (DOP) to achieve best performance. However, aging effects have become an unavoidable threat which may degrade system performance and even cause functional failure. We observe that if a task is always executed with maximum DOP, all cores may continuously suffer from the NBTI effect and wear out soon. On the other hand, if we can decrease DOP without causing task deadline violation, some cores may have opportunities to be power-gated and recover from the NBTI effect. In this paper, we propose a novel NBTI-Aware task parallelism framework for multi-core systems to realize such an idea. Our framework first prioritizes ready tasks based on its criticality and then decide best DOP of each task without causing timing violation. After that, a task-To-core mapping algorithm which considers both IR-drop and core utilization is proposed. Finally, a recover decision algorithm is used to find the suitable recover mode of each core. Experimental results show that the proposed NBTI-Aware task parallelism framework can successfully extend system lifetime to 3.7 times compared with MAX DOP method.
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U2 - 10.1109/ISQED48828.2020.9137005
DO - 10.1109/ISQED48828.2020.9137005
M3 - Conference contribution
AN - SCOPUS:85089947889
T3 - Proceedings - International Symposium on Quality Electronic Design, ISQED
SP - 117
EP - 122
BT - Proceedings of the 21st International Symposium on Quality Electronic Design, ISQED 2020
PB - IEEE Computer Society
T2 - 21st International Symposium on Quality Electronic Design, ISQED 2020
Y2 - 25 March 2020 through 26 March 2020
ER -