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This book contains the proceedings of the 6th International Workshop on OpenMP held in Tsukuba City, Japan, in June 2010. The International Wo- shop on OpenMP is an annual series of workshops dedicated to the promotion andadvancementofallaspectsfocusing onparallelprogrammingwithOpenMP. OpenMP is now a major programming model for shared memory systems from multi-core machines to large-scale servers. Recently, new ideas and ch- lengeshavebeenproposedtoextendOpenMPframeworktosupportaccelerators and also to exploit other forms of parallelism beyond loop-level parallelism. The workshop serves as a forum to present the latest research ideas and results related to this shared memory programming model. It also o ers the opportunity to interact with OpenMP users, developers and the people working on the next release of the speci cation. In response to the Call-for-Papers for the technical program, the Program Committee received a total of 23 submissions from all over the world including Asia, USA and Europe, and all submissions were carefully refereed in a rigorous processwhichrequiredatleastthreereviewsforeachpaper,usingtheEasyChair conferencesystem.The naldecisionswerecollectivelymadeinMarch2010.Due to time and space limitations for the workshop and proceedings, only 13 papers could be selected for presentation and inclusion in the proceedings. We believe we havechosen a diverse, high-quality set of papers, re ecting a stimulating and enjoyable workshop. Finally, we would like to thank all authors, referees,and committee members for their outstanding contributions which have ensured a continuation of the high quality of IWOMP workshops.