Partial parallelization of VMEC system

A C K N O W L E D G M E N T S ........................................................................................... vi 1 In tro d u ctio n ... 1 2 Parallel P rocessin g ............................................................................. 3 2.1 Parallel C o m p u te rs ................................... 3 2.2 Parallel C o m p u ta tio n s ................................................................................... 4 2.2.1 D ata P a ra l le l is m .................................................................................. 5 2.2.2 Shared M em o ry .......................................................................... 5 2.2.3 Message Passing ............................................................................ . 6 2.3 Performance Issues ................................................................................... 7 3 H igh Perform ance F ortran ..................................................................................... 8 3.1 Basics of High Performance F o r tr a n ............................................................. 8 3.1.1 Fortran 9 0 ............................................................................................... 9 3.1.2 Compiler D irectives.............................................................................. 10 3.1.3 Parallelism Features ........................................................................... 11 3.2 D ata Mapping . . ......................................................................................... 12 3.2.1 DISTRIBUTE directive .................................................................... 13 3.2.2 ALIGN d i r e c t iv e .................................................................................. 13 3.2.3 TEMPLATE d i r e c t iv e ............................ 14 3.2.4 PROCESSOR directive ............................................ 15 3.2.5 D ata Mapping for Procedure A rg u m e n ts ...................................... 15 3.3 D ata Parallelism ............................................................................................. 17 3.3.1 FORALL statement ........................................................................... 17