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| 題 名 | Representing Task and Machine Heterogeneities for Heterogeneous Computing Systems |
|---|---|
| 作 者 | Ali,Shoukat; Siegel,Howard Jay; Maheswaran,Muthucumaru; Hensgen,Debra; Ali,Sahra; | 書刊名 | 淡江理工學刊 |
| 卷 期 | 3:3 2000.11[民89.11] |
| 頁 次 | 頁195-207 |
| 分類號 | 312.2 |
| 關鍵詞 | 分散式計算; 異質計算; 電腦; Distributed computing; Heterogeneous computing; Workload characterization; Modeling computer systems heterogeneity; Modeling workload heterogeneity; Cluster computing; Grid computing; |
| 語 文 | 英文(English) |
| 英文摘要 | A distributed deterogeneous computing (HC) system consists of diversely capable machines harnessed together to execute a set of tasks that vary in their computational requirements. Heuristics are needed to map (match and schedule) tasks onto machines in an HC system so as to optimize some figure of merit. An HC system model is needed to simulate different HC environments to allow that study of the relative performance of different mapping heuristics under different circumstances. This paper characterizes a simulated HC environment by using the expected execution times of the tasks that arrive in the system on the different machines present in the system. This information is arranged in an “expected time to compute” (ETC) matrix as a model of the given HC system, where the entry (ί,j) is the expected execution time of task ί on machine j. The ETC model is used to express the heterogeneity among the runtimes of the tasks to be executed, and among the machines in the HC system. An existing range-based technique to express heterogeneity in ETC matrices is described. A coefficient-of-variation based technique to express heterogeneity in ETC matrices is proposed, and compared with the range-based technique. The coefficient-of-variation-based ETC generation method provides a greater control over the spread of values (i.e., heterogeneity) in any given row or column of the ETC matrix than the range-based method. |
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