Basic HTML version of Foils prepared August 7 98

Foil 23 Example of Asynchronous I/O

From DoD HPF Training -- 6. HPF2 DoD Training and Others -- 1995-98. by Chuck Koelbel -- Rice University
1 i0 = 0; i1 = 1
2 READ (file0, ID=id0, END=100) a(i0,1:1048576)
3 DO
  • WAIT (ID=id0, END=100)
  • ! start next read into other row
  • itmp = i0; i0 = i1; i1 = itmp
  • READ (file0, ID=id0, END=100) a(i0,1:1048576)
  • ! overlap I/O with useful work
  • CALL PROCESSING( a(i1,1:1048576) )
4 END DO
5 100 CONTINUE
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