By Barbara Chapman, Weimin Zheng, Guang R. Gao, Mitsuhisa Sato, Eduard Ayguadé, Dongsheng Wang
This e-book constitutes the completely refereed post-workshop lawsuits of the 3rd overseas Workshop on OpenMP, IWOMP 2007, held in Beijing, China, in June 2007.
The 14 revised complete papers and eight revised brief papers offered have been conscientiously reviewed and chosen from 28 submissions. The papers deal with all themes with regards to OpenMP, similar to OpenMP functionality research and modeling, OpenMP functionality and correctness instruments and proposed OpenMP extensions, in addition to functions in a variety of domain names, e.g., medical computation, games, special effects, multimedia, details retrieval, optimization, textual content processing, info mining, finance, sign and snapshot processing, and numerical solvers.
Read Online or Download A Practical Programming Model for the Multi-Core Era: 3rd International Workshop on OpenMP, IWOMP 2007, Beijing, China, June 3-7, 2007 Proceedings PDF
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Extra info for A Practical Programming Model for the Multi-Core Era: 3rd International Workshop on OpenMP, IWOMP 2007, Beijing, China, June 3-7, 2007 Proceedings
The current implementation of Nebelung library performs lazy conﬂict detection. Read and write sets are maintained dynamically and all memory operations are performed locally for the transaction. At commit time, the library checks if there is any conﬂict with other transactions. If conﬂict exists, the current transaction is committed and other transactions are aborted. In this way the transaction progress is guaranteed. 5 Source-to-Source Translation in Mercurium The Mercurium OpenMP source-to-source translator transforms the code inside the transaction block in such a way that for each memory access, a proper 46 M.
The same load-balancing scheme as described in previous sections is applied in the subteam version to create zone groups. Each subteam works on one zone group, and thus, the number of zone groups equals the number of subteams. We use an environment variable to specify the number of subteams at runtime. Threads assigned to each subteam will work on loop-level parallelism within each zone. There is no overlapping of thread ids among diﬀerent subteams. Similar to the nested OpenMP version, the routine “exch_qbc” uses direct array copy and proper global barrier synchronization for boundary communication.
C Springer-Verlag Berlin Heidelberg 2008 26 H. Jin, B. Chapman, and L. Huang thread team, as an alternative for nested OpenMP. Conceptually, a subteam is similar to a process subgroup in the MPI context. The user has control over how threads are subdivided in order to suit application needs. The subteam proposal introduced an onthreads clause to a work-sharing directive so that the work will be performed among the subset of threads, including the implicit barrier at the end of the construct. One of the prominent extensions to the current OpenMP is the Workqueuing (or Taskq) model ﬁrst introduced by Shah et al.