TY - GEN
T1 - Locality-optimized mixed static/dynamic scheduling for improving load balancing on SMPs
AU - Kale, Vivek
AU - Randles, Amanda
AU - Gropp, William D.
N1 - Publisher Copyright:
© ACM 2014.
PY - 2014/9/9
Y1 - 2014/9/9
N2 - Application performance can be degraded significantly due to node-local load imbalances during application execution. Prior work suggested using a mixed static/dynamic scheduling approach for handling this problem, specifically in the context of fine-grained, transient load imbalances. Here, we consider an alternate strategy for more general load imbalances where fine-grained, transient load imbalance may be coupled with coarse-grained load imbalance. Specifically, we implement a scheduling scheme in which we modify the data layout in mixed static/dynamic scheduling, and add an additional tuned constraint in the dequeue function of our scheduler. Through experimentation of an n-body particle simulation code on modern multi-core architectures, our technique gives a 19.4% performance gain over dynamic scheduling, and an overall 48.6% performance gain over standard static scheduling.
AB - Application performance can be degraded significantly due to node-local load imbalances during application execution. Prior work suggested using a mixed static/dynamic scheduling approach for handling this problem, specifically in the context of fine-grained, transient load imbalances. Here, we consider an alternate strategy for more general load imbalances where fine-grained, transient load imbalance may be coupled with coarse-grained load imbalance. Specifically, we implement a scheduling scheme in which we modify the data layout in mixed static/dynamic scheduling, and add an additional tuned constraint in the dequeue function of our scheduler. Through experimentation of an n-body particle simulation code on modern multi-core architectures, our technique gives a 19.4% performance gain over dynamic scheduling, and an overall 48.6% performance gain over standard static scheduling.
UR - http://www.scopus.com/inward/record.url?scp=84958971311&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84958971311&partnerID=8YFLogxK
U2 - 10.1145/2642769.2642788
DO - 10.1145/2642769.2642788
M3 - Conference contribution
AN - SCOPUS:84958971311
T3 - ACM International Conference Proceeding Series
SP - 115
EP - 116
BT - Proceedings of the 21st European MPI Users' Group Meeting, EuroMPI/ASIA 2014
PB - Association for Computing Machinery
T2 - 21st European MPI Users' Group Meeting, EuroMPI/ASIA 2014
Y2 - 9 September 2014 through 12 September 2014
ER -