Locality preserving load balancing with provably small overhead

Author(s):  
Robert Garmann
2000 ◽  
Vol 10 (01) ◽  
pp. 111-132 ◽  
Author(s):  
VOON-YEE VEE ◽  
WEN-JING HSU

In the past decade, many synchronous algorithms have been proposed for parallel and discrete simulations. However, the actual performance of these algorithms have been far from ideal, especially when event granularity is small. Barring the case of low parallelism in the given simulation models, one of the main reasons of low speedups is in the uneven load distribution among processors. To amend for this, both static and dynamic load balancing approaches have been proposed. Nevertheless, static schemes based on partitioning of LPs are often subject to the dynamic behavior of the specific simulation models and are therefore application dependent; dynamic load balancing schemes, on the other hand, often suffer from loss of localities and hence cache misses, which could severely penalize on fine-grained event processing. In this paper, we present several new locality-preserving load balancing mechanisms for synchronous simulations on shared-memory multiprocessors. We focus on the type of synchronous simulations where the number of LPs to be processed within a cycle decreases monotonically. We show both theoretically and empirically that some of these mechanisms incur very low overhead. The mechanisms have been implemented by using MIT's Cilk and tested with a number of simulation applications. The results confirm that one of the new mechanisms is indeed more efficient and scalable than common existing approaches.


Author(s):  
Shailendra Raghuvanshi ◽  
Priyanka Dubey

Load balancing of non-preemptive independent tasks on virtual machines (VMs) is an important aspect of task scheduling in clouds. Whenever certain VMs are overloaded and remaining VMs are under loaded with tasks for processing, the load has to be balanced to achieve optimal machine utilization. In this paper, we propose an algorithm named honey bee behavior inspired load balancing, which aims to achieve well balanced load across virtual machines for maximizing the throughput. The proposed algorithm also balances the priorities of tasks on the machines in such a way that the amount of waiting time of the tasks in the queue is minimal. We have compared the proposed algorithm with existing load balancing and scheduling algorithms. The experimental results show that the algorithm is effective when compared with existing algorithms. Our approach illustrates that there is a significant improvement in average execution time and reduction in waiting time of tasks on queue using workflowsim simulator in JAVA.


2003 ◽  
Vol 123 (10) ◽  
pp. 1847-1857
Author(s):  
Takahiro Tsukishima ◽  
Masahiro Sato ◽  
Hisashi Onari
Keyword(s):  

2014 ◽  
Vol 134 (8) ◽  
pp. 1104-1113
Author(s):  
Shinji Kitagami ◽  
Yosuke Kaneko ◽  
Hidetoshi Kambe ◽  
Shigeki Nankaku ◽  
Takuo Suganuma
Keyword(s):  

2013 ◽  
Vol 133 (4) ◽  
pp. 891-898
Author(s):  
Takeo Sakairi ◽  
Masashi Watanabe ◽  
Katsuyuki Kamei ◽  
Takashi Tamada ◽  
Yukio Goto ◽  
...  

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