25
Languages (continued)
•ZPL 1st (and
still only) parallel language with performance model (WYSIWYG)
–Designed
from first principles to help programmers
–No
explicit concurrency, communication, or synch.
–Programmer
is insulated from details, but it is possible to write efficient solutions
with WYSIWYG
–Compiler
is heavily optimized, both seq. and para.
–The
communication abstraction is Ironman -- four procedures that mark
sender’s/receiver’s active regions -- uses native communication of machine
ZPL is convenient and
efficient