1、CEOs Report,Larry Meadows on behalf of Sanjiv Shah, CEO, OpenMP ARBIWOMP 2005, Eugene, June 1-2, 2005,2,Agenda,The OpenMP ARB Activities over the last year Activities for the next year Beyond 3.0,3,The OpenMP ARB,The care of OpenMP is in the hands of the OpenMP Architecture Review Board (the ARB). T
2、he ARB: Interprets OpenMP Writes new specifications - keeps OpenMP relevant. Works to increase the impact of OpenMP. Organizations join the ARB - not individuals Current members Permanent: Fujitsu, HP, IBM, Intel, NEC, SGI, Sun, PGI Auxiliary: ASCI, cOMPunity, EPCC, KSL, NASA New member since last r
3、eport: NASA,4,OpenMP ARB Current Organization,5,Agenda,OpenMP history and the ARB Activities over the last year Activities for the next year Beyond 3.0,6,Activities over last year,Workshops continue WOMPAT 2004 (Barbara Chapman) ; another good Lab session WOMPEI 2004, (can anyone report?) IWOMP 2005
4、 inaugurates the merged conference Website finally under ARB control Debug committee published a whitepaper And most importantly.,7,OpenMP 2.5 is released!,Congratulations and thanks to Mark Bull and all of the omp-lang team for releasing a specification for the ages.,I must congratulate the committ
5、ee on a work well done. Its been quite a challenge to unify the spec for Fortran AND c/c+, but in my opinion you have succeeded well. (Nils Smeds, KTH),What the critics say:,let me first congratulate you to this very fine piece of work(Michael Suess, University of Kassel),I laughed, I cried, I could
6、nt put it down. Two thumbs up! (Anonymous parallel programmer),8,Agenda,ARB Activities over the last year Activities for the next year Beyond 3.0,9,OpenMP 3.0,Mark Bull will chair the committee Schedule to be fixed in advance (timeline and milestones) Feature list Must have features Desirable featur
7、es Drop those from desirable list that cant be done in time Target release: September 2006 Work backwards to create schedule,10,3.0 High Priority Features,WorkQueuing Standardized variables for stack size control idle-thread behavior Additional SCHEDULE kinds Reductions with user defined functions R
8、EDUCE construct,11,3.0 High Priority Fixes,Remove storage reuse for private THREADPRIVATE persistence and nesting C/C+ directive grammar,12,Agenda,ARB Activities over the last year Activities for the next year Beyond 3.0,13,OpenMP Libraries,All successful languages encourage libraries; more modern l
9、anguages are mostly about libraries (MFC, STL, Java class libraries, LAPAK, BLAS, .) Parallel languages need libraries even more: Parallel programming is hard Parallel algorithms can be developed by experts and used by novices Modern languages (C+, C#) allow expressing parallelism via metaprogrammin
10、g (like STL),14,OpenMP: Problems for Libraries,There is no ABI for OpenMP Even on the same hardware; e.g., PGI, Intel, Microsoft, and Pathscale all have x86-64 compilers; can you mix and match OpenMP code compiled with different compilers? Theres a gcc project to do OpenMP. Do we really want another
11、 gcc compatibility race? There is no analogy to MPI communicators Threads have a “global” scope; need a “library” scope Nested parallelism/Orphaning enough?,15,Suggestions for action,Subcommittee to work on libraries Canned algorithms: Graph/numerical/search/media algorithms (mp3, mpeg, imaging, LAP
12、ACK, BLAS2/3, FFT, ) Metaprogramming: C+ container classes implementing parallel versions of classic algorithms (hashes, sorting, lists, stacks, ) ABI discussions This needs to be driven by the vendors Will we ever agree? Very hard, but our users suffer If we dont do something, well be forced to acc
13、ept whatever gcc comes up with,16,OpenMP Features,We want 3.0 to be done quickly Nothing substantial has changed since 2.0 (really 1.1) There is a real need for flexible parallel languages, given the HW architecture progression We need a plan for 3.0+ Research is fertile ground for “new” ideas: DARPA HPCS See Suns Fortress, Crays Chapel, IBMs X10 Atomic blocks (transactional memory semantics) Futures/continuations .,
