New Draft of I/O Chapter

Bill Nitzberg (nitzberg@nas.nasa.gov)
Thu, 19 Sep 1996 19:45:21 -0700

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Here's the updated I/O chapter. I have tried to incorporate
everything from the previous MPI forum meeting as well as
from the ongoing email discussions.

A new version is due to Steve by Tuesday at 10am (my time),
so if you are going to send comments and corrections, they
need to get to me by Monday night. Please keep in mind
that it is much easier for an editor to incorporate changes
when you propose new text rather than simply point out faults
in existing text. :-)

Enjoy,

- bill

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%%Page: 10 12
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%%Page: 11 13
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eop
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%%Page: 16 18
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eop
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2651 y(data.)g Fm(MPI)p 281 2651 V 16 w(RESIZE)c Ft(do)q(es)h(not)f
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103 y(2)1967 159 y(3)1967 215 y(4)1967 272 y(5)1967 328
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611 y(11)1959 667 y(12)1959 724 y(13)1959 780 y(14)1959
836 y(15)1959 893 y(16)1959 949 y(17)1959 1006 y(18)1959
1062 y(19)1959 1119 y(20)1959 1175 y(21)1959 1232 y(22)1959
1288 y(23)1959 1345 y(24)1959 1401 y(25)1959 1457 y(26)1959
1514 y(27)1959 1570 y(28)1959 1627 y(29)1959 1683 y(30)1959
1740 y(31)1959 1796 y(32)1959 1853 y(33)1959 1909 y(34)1959
1966 y(35)1959 2022 y(36)1959 2078 y(37)1959 2135 y(38)1959
2191 y(39)1959 2248 y(40)1959 2304 y(41)1959 2361 y(42)1959
2417 y(43)1959 2474 y(44)1959 2530 y(45)1959 2587 y(46)1959
2643 y(47)1959 2699 y(48)p eop
%%Page: 21 23
21 22 bop 75 -100 a Fk(11.2.)34 b(FILE)15 b(MANIPULA)l(TION)1139
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268 y(Outstanding)c(data)f(access)g(op)q(erations)h(b)q(eha)o(v)o(e)g
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1445 y Fp(?)16 b Fo($Oct$)166 1502 y Fm(MPI)p 251 1502
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y(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272 y(5)-32
328 y(6)-32 385 y(7)-32 441 y(8)-32 498 y(9)-40 554 y(10)-40
611 y(11)-40 667 y(12)-40 724 y(13)-40 780 y(14)-40 836
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y(47)-40 2699 y(48)p eop
%%Page: 22 24
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w(STATUS)p 1313 2444 V 16 w(SIZE$,)h(IERROR)170 2500
y(INTEGER*8)g(OFFSET)166 2587 y Fm(MPI)p 251 2587 14
2 v 16 w(READ)p 386 2587 V 17 w(EXPLICIT)p 600 2587 V
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y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
y(17)1959 1006 y(18)1959 1062 y(19)1959 1119 y(20)1959
1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 23 25
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557 2028 V 15 w(explicit)p 764 2028 V 17 w(all$const)f(MPI::Offset)h
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(buftype,)393 2141 y(const)h(int)h(bufcount,)e(MPI::Status&)h(status$)
75 2228 y(MPI)p 150 2228 V 17 w(WRITE)p 287 2228 V 16
w(EXPLICIT)p 495 2228 V 16 w(ALL$FH,)g(OFFSET,)g(BUFF,)g(BUFTYPE,)g
(BUFCOUNT,)g(STATUS,)g(IERROR$)170 2284 y(<type>)g(BUFF$*$)170
2341 y(INTEGER)g(FH,)h(BUFTYPE,)f(BUFCOUNT,)f(STATUS$MPI)p
1153 2341 V 16 w(STATUS)p 1313 2341 V 16 w(SIZE$,)h(IERROR)170
2397 y(INTEGER*8)g(OFFSET)166 2484 y Fm(MPI)p 251 2484
14 2 v 16 w(WRITE)p 410 2484 V 16 w(EXPLICIT)p 623 2484
V 16 w(ALL)9 b Ft(is)i(a)f(collectiv)o(e)i(v)o(ersion)e(of)g(the)g(blo)
q(c)o(king)i Fm(MPI)p 1521 2484 V 15 w(WRITE)p 1679 2484
V 17 w(EXPLICIT)75 2540 y Ft(in)o(terface.)26 b(This)17
b(routine)h(is)f(seman)o(tically)i(iden)o(tical)g(to)d
Fm(MPI)p 1184 2540 V 16 w(WRITE)p 1343 2540 V 16 w(EXPLICIT)p
Ft(,)g(except)i(that)e(all)75 2596 y(pro)q(cesses)11
b(in)g(the)f(comm)o(unicator)g(group)f(asso)q(ciated)i(with)f(the)g
(\014le)i(handle)f Fm(fh)g Ft(m)o(ust)e(call)i Fm(MPI)p
1714 2596 V 16 w(WRITE)p 1873 2596 V 17 w(EXPLICIT)p
2087 2596 V 15 w(ALL)p Ft(.)-32 46 y Fo(1)-32 103 y(2)-32
159 y(3)-32 215 y(4)-32 272 y(5)-32 328 y(6)-32 385 y(7)-32
441 y(8)-32 498 y(9)-40 554 y(10)-40 611 y(11)-40 667
y(12)-40 724 y(13)-40 780 y(14)-40 836 y(15)-40 893 y(16)-40
949 y(17)-40 1006 y(18)-40 1062 y(19)-40 1119 y(20)-40
1175 y(21)-40 1232 y(22)-40 1288 y(23)-40 1345 y(24)-40
1401 y(25)-40 1457 y(26)-40 1514 y(27)-40 1570 y(28)-40
1627 y(29)-40 1683 y(30)-40 1740 y(31)-40 1796 y(32)-40
1853 y(33)-40 1909 y(34)-40 1966 y(35)-40 2022 y(36)-40
2078 y(37)-40 2135 y(38)-40 2191 y(39)-40 2248 y(40)-40
2304 y(41)-40 2361 y(42)-40 2417 y(43)-40 2474 y(44)-40
2530 y(45)-40 2587 y(46)-40 2643 y(47)-40 2699 y(48)p
eop
%%Page: 24 26
24 25 bop 75 -100 a Ft(24)1342 b Fk(CHAPTER)15 b(11.)35
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1063 y(MPI::Request&)e(request$)75 1149 y(MPI)p 150
1149 V 17 w(IREAD)p 287 1149 V 16 w(EXPLICIT$FH,)g(OFFSET,)h(BUFF,)h
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y(<type>)g(BUFF$*$)170 1262 y(INTEGER)g(FH,)h(BUFTYPE,)f(BUFCOUNT,)f
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160 1461 V 16 w(IREAD)p 308 1461 V 16 w(EXPLICIT)c Ft(asso)q(ciates)f
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1574 y(for)f(its)g(completion)h($via)f Fm(MPI)p 617
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1857 y(tion$,)f(a)g(total)g(n)o(um)o(b)q(er)g(of)g Fm(bufcount)i
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2281 y Fh(int)23 b(MPI)p 245 2281 15 2 v 17 w(Iread)p
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2424 y(int)g(MPI::File::Iread)p 557 2424 V 15 w(explicit)p
764 2424 V 17 w(all$const)f(MPI::Offset)h(offset,)f(void*)i(buff,)393
2480 y(const)f(MPI::Datatype&)f(buftype,)h(const)g(int)h(bufcount,)393
2536 y(MPI::Request&)e(request$)75 2623 y(MPI)p 150
2623 V 17 w(IREAD)p 287 2623 V 16 w(EXPLICIT)p 495 2623
V 16 w(ALL$FH,)h(OFFSET,)g(BUFF,)g(BUFTYPE,)g(BUFCOUNT,)g(REQUEST,)g
(IERROR$)170 2679 y(<type>)g(BUFF$*$)1967 46 y Fo(1)1967
103 y(2)1967 159 y(3)1967 215 y(4)1967 272 y(5)1967 328
y(6)1967 385 y(7)1967 441 y(8)1967 498 y(9)1959 554 y(10)1959
611 y(11)1959 667 y(12)1959 724 y(13)1959 780 y(14)1959
836 y(15)1959 893 y(16)1959 949 y(17)1959 1006 y(18)1959
1062 y(19)1959 1119 y(20)1959 1175 y(21)1959 1232 y(22)1959
1288 y(23)1959 1345 y(24)1959 1401 y(25)1959 1457 y(26)1959
1514 y(27)1959 1570 y(28)1959 1627 y(29)1959 1683 y(30)1959
1740 y(31)1959 1796 y(32)1959 1853 y(33)1959 1909 y(34)1959
1966 y(35)1959 2022 y(36)1959 2078 y(37)1959 2135 y(38)1959
2191 y(39)1959 2248 y(40)1959 2304 y(41)1959 2361 y(42)1959
2417 y(43)1959 2474 y(44)1959 2530 y(45)1959 2587 y(46)1959
2643 y(47)1959 2699 y(48)p eop
%%Page: 25 27
25 26 bop 75 -100 a Fk(11.3.)34 b(D)o(A)l(T)l(A)15 b(A)o(CCESS)g(WITH)g
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106 y(INTEGER*8)g(OFFSET)166 192 y Fm(MPI)p 251 192 14
2 v 16 w(IREAD)p 399 192 V 16 w(EXPLICIT)p 612 192 V
16 w(ALL)10 b Ft(is)g(a)g(collectiv)o(e)i(v)o(ersion)e(of)g(the)g(non)o
(blo)q(c)o(king)i Fm(MPI)p 1582 192 V 16 w(IREAD)p 1730
192 V 16 w(EXPLICIT)75 249 y Ft(in)o(terface.)28 b(This)19
b(routine)f(is)h(seman)o(tically)g(iden)o(tical)h(to)d
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1862 305 V 17 w(EXPLICIT)p 2076 305 V 16 w(ALL)p Ft(.)75
424 y Fl(11.3.4)49 b(Nonblo)q(cking)19 b(W)o(rite)75
604 y Fm(MPI)p 160 604 V 16 w(IWRITE)p 332 604 V 16 w(EXPLICIT$fh,)14
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681 y Ff(INOUT)62 b Fm(fh)550 b Ff(V)m(alid)13 b(\014le)g(handle)h
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v 17 w(Iwrite)p 430 1164 V 16 w(explicit$MPI)p 734 1164
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(bufcount,)f(MPI)p 1321 1221 V 16 w(Request)g(*request$)75
1307 y(int)g(MPI::File::Iwrite)p 581 1307 V 15 w(explicit$const)f
(MPI::Offset)h(offset,)g(const)g(void*)g(buff,)393 1364
y(const)g(MPI::Datatype&)f(buftype,)h(const)g(int)h(bufcount,)393
1420 y(MPI::Request&)e(request$)75 1506 y(MPI)p 150
1506 V 17 w(IWRITE)p 311 1506 V 16 w(EXPLICIT$FH,)g(OFFSET,)h(BUFF,)g
(BUFTYPE,)g(BUFCOUNT,)g(REQUEST,)g(IERROR$)170 1563
y(<type>)g(BUFF$*$)170 1619 y(INTEGER)g(FH,)h(BUFTYPE,)f(BUFCOUNT,)f
(REQUEST,)h(IERROR)170 1676 y(INTEGER*8)g(OFFSET)166
1762 y Fm(MPI)p 251 1762 14 2 v 16 w(IWRITE)p 423 1762
V 16 w(EXPLICIT)18 b Ft(is)i(a)e(non)o(blo)q(c)o(king)j(v)o(ersion)e
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269 1819 V 16 w(IWRITE)p 441 1819 V 16 w(EXPLICIT)12
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2101 y(write)c(is)h(called,)g(un)o(til)h(the)e(write)g(completes)h
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Fo($Oct$)166 2478 y Fm(MPI)p 251 2478 V 16 w(IWRITE)p
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(using)75 2704 y(the)d(routines)h Fm(MPI)p 413 2704 V
16 w(GET)p 517 2704 V 16 w(COUNT)g Ft(or)f Fm(MPI)p 843
2704 V 16 w(GET)p 947 2704 V 17 w(ELEMENTS)p Ft(.)-32
46 y Fo(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272
y(5)-32 328 y(6)-32 385 y(7)-32 441 y(8)-32 498 y(9)-40
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y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40 1457
y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40 1683
y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40 1909
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y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40 2361
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y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Page: 26 28
26 27 bop 75 -100 a Ft(26)1342 b Fk(CHAPTER)15 b(11.)35
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b(MPI)p 245 153 15 2 v 17 w(Iwrite)p 406 153 V 17 w(explicit)p
615 153 V 16 w(all$MPI)p 799 153 V 16 w(File)g(fh,)h(MPI)p
1102 153 V 16 w(Offset)f(offset,)g(void)h(*buff,)393
209 y(MPI)p 468 209 V 17 w(Datatype)f(buftype,)f(int)i(bufcount,)f(MPI)
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V 16 w(all$const)g(MPI::Offset)f(offset,)393 352 y(const)h(void*)h
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150 495 V 17 w(IWRITE)p 311 495 V 16 w(EXPLICIT)p 519
495 V 16 w(ALL$FH,)g(OFFSET,)g(BUFF,)g(BUFTYPE,)g(BUFCOUNT,)g
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2 v 16 w(IWRITE)p 423 808 V 16 w(EXPLICIT)p 636 808 V
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eop
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Fm(MPI)p 251 2647 14 2 v 16 w(IWRITE)p 423 2647 V 16
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1006 y(18)-40 1062 y(19)-40 1119 y(20)-40 1175 y(21)-40
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1457 y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40
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%%Page: 30 32
30 31 bop 75 -100 a Ft(30)1342 b Fk(CHAPTER)15 b(11.)35
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2561 y(int)g(MPI::File::Get)p 509 2561 V 16 w(position$MPI::Offset&)e
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46 y Fo(1)1967 103 y(2)1967 159 y(3)1967 215 y(4)1967
272 y(5)1967 328 y(6)1967 385 y(7)1967 441 y(8)1967 498
y(9)1959 554 y(10)1959 611 y(11)1959 667 y(12)1959 724
y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
y(17)1959 1006 y(18)1959 1062 y(19)1959 1119 y(20)1959
1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 31 33
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468 y(the)f(displacemen)o(t)i(to)d(the)h(curren)o(t)h(p)q(osition)g
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661 y Fq(11.5)60 b(Data)19 b(Access)h(with)g(Sha)n(red)f(File)g(P)n
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1251 y(p)q(oin)o(ter,)143 1345 y Fp(\017)g Ft(the)14
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(the)f(same)189 1552 y Fm(disp)f Ft(and)f(the)h(same)f
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(\014le)i($via)e Fm(MPI)p 1543 1552 V 16 w(VIEW)p Ft($.)75
1646 y(The)f(serialization)h(ordering)e(is)h(not)f(deterministic.)21
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2373 y($)p Fj(End)j(of)i(advic)n(e)f(to)g(users.)p Ft($)-32
46 y Fo(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272
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y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40 1457
y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40 1683
y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40 1909
y(34)-40 1966 y(35)-40 2022 y(36)-40 2078 y(37)-40 2135
y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40 2361
y(42)-40 2417 y(43)-40 2474 y(44)-40 2530 y(45)-40 2587
y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Page: 32 34
32 33 bop 75 -100 a Ft(32)1342 b Fk(CHAPTER)15 b(11.)35
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780 y(14)1959 836 y(15)1959 893 y(16)1959 949 y(17)1959
1006 y(18)1959 1062 y(19)1959 1119 y(20)1959 1175 y(21)1959
1232 y(22)1959 1288 y(23)1959 1345 y(24)1959 1401 y(25)1959
1457 y(26)1959 1514 y(27)1959 1570 y(28)1959 1627 y(29)1959
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2135 y(38)1959 2191 y(39)1959 2248 y(40)1959 2304 y(41)1959
2361 y(42)1959 2417 y(43)1959 2474 y(44)1959 2530 y(45)1959
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%%Page: 33 35
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2699 y(48)p eop
%%Page: 34 36
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2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 35 37
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215 y(4)-32 272 y(5)-32 328 y(6)-32 385 y(7)-32 441 y(8)-32
498 y(9)-40 554 y(10)-40 611 y(11)-40 667 y(12)-40 724
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1006 y(18)-40 1062 y(19)-40 1119 y(20)-40 1175 y(21)-40
1232 y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40
1457 y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40
1683 y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40
1909 y(34)-40 1966 y(35)-40 2022 y(36)-40 2078 y(37)-40
2135 y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40
2361 y(42)-40 2417 y(43)-40 2474 y(44)-40 2530 y(45)-40
2587 y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Page: 36 38
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557 1440 V 15 w(shared)p 716 1440 V 17 w(ordered$void*)f(buff,)393
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1951 y(call)g Fm(MPI)p 243 1951 V 16 w(IREAD)p 391 1951
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y(the)20 b(individual)j(request)d(has)g(completed)h($i.e.)34
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b(The)15 b(shared)h(\014le)h(p)q(oin)o(ter)f(is)g(up)q(dated)g(b)o(y)
1967 46 y Fo(1)1967 103 y(2)1967 159 y(3)1967 215 y(4)1967
272 y(5)1967 328 y(6)1967 385 y(7)1967 441 y(8)1967 498
y(9)1959 554 y(10)1959 611 y(11)1959 667 y(12)1959 724
y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
y(17)1959 1006 y(18)1959 1062 y(19)1959 1119 y(20)1959
1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 37 39
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Fm(MPI)p 251 1506 14 2 v 16 w(IWRITE)p 423 1506 V 16
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b(The)13 b(shared)g(\014le)h(p)q(oin)o(ter)f(is)g(up)q(dated)h(b)o(y)e
(the)h(amoun)o(ts)f(of)g(data)g(requested)75 2466 y(b)o(y)18
b(all)h(pro)q(cesses)g(of)f(the)g(group.)29 b(F)l(or)17
b(eac)o(h)i(pro)q(cess,)g(the)f(n)o(um)o(b)q(er)g(of)g
Fm(buft)o(yp)q(e)i Ft(elemen)o(ts)f(actually)75 2523
y(written)d(b)o(y)g(that)f(pro)q(cess)h(can)g(b)q(e)h(extracted)e(from)
g(the)h Fm(MPI)p 1177 2523 V 16 w(TEST)g Ft(or)g Fm(MPI)p
1462 2523 V 15 w(W)l(AIT)g Ft(return)g(status,)75 2579
y(using)g(the)f(routines)h Fm(MPI)p 532 2579 V 16 w(GET)p
636 2579 V 16 w(COUNT)g Ft(or)f Fm(MPI)p 962 2579 V 16
w(GET)p 1066 2579 V 17 w(ELEMENTS)p Ft(.)-32 46 y Fo(1)-32
103 y(2)-32 159 y(3)-32 215 y(4)-32 272 y(5)-32 328 y(6)-32
385 y(7)-32 441 y(8)-32 498 y(9)-40 554 y(10)-40 611
y(11)-40 667 y(12)-40 724 y(13)-40 780 y(14)-40 836 y(15)-40
893 y(16)-40 949 y(17)-40 1006 y(18)-40 1062 y(19)-40
1119 y(20)-40 1175 y(21)-40 1232 y(22)-40 1288 y(23)-40
1345 y(24)-40 1401 y(25)-40 1457 y(26)-40 1514 y(27)-40
1570 y(28)-40 1627 y(29)-40 1683 y(30)-40 1740 y(31)-40
1796 y(32)-40 1853 y(33)-40 1909 y(34)-40 1966 y(35)-40
2022 y(36)-40 2078 y(37)-40 2135 y(38)-40 2191 y(39)-40
2248 y(40)-40 2304 y(41)-40 2361 y(42)-40 2417 y(43)-40
2474 y(44)-40 2530 y(45)-40 2587 y(46)-40 2643 y(47)-40
2699 y(48)p eop
%%Page: 38 40
38 39 bop 75 -100 a Ft(38)1342 b Fk(CHAPTER)15 b(11.)35
b(I/O)75 49 y Fl(11.5.3)49 b(Seek)16 b($collective$)75
230 y Fm(MPI)p 160 230 14 2 v 16 w(SEEK)p 287 230 V 16
w(SHARED$fh,)g(o\013set,)f(whence$)117 307 y Ff(INOUT)62
b Fm(fh)550 b Ff([SAME])14 b(V)m(alid)e(\014le)i(handle)g($handle$)
117 381 y(IN)155 b Fm(o\013set)484 b Ff([SAME])14 b(File)f(o\013set)i
($o\013set$)117 455 y(IN)155 b Fm(whence)450 b Ff([SAME])14
b(Up)q(date)g(mo)q(de)f($in)o(teger$)75 580 y Fh(int)23
b(MPI)p 245 580 15 2 v 17 w(Seek)p 358 580 V 17 w(shared$MPI)p
615 580 V 16 w(File)g(fh,)g(MPI)p 917 580 V 17 w(Offset)g(offset,)g
(MPI)p 1364 580 V 17 w(Whence)g(whence$)75 666 y(int)g
(MPI::File::Seek)p 533 666 V 16 w(shared$const)f(MPI::Offset)g
(offset,)393 723 y(const)h(MPI::Whence)g(whence$)75
809 y(MPI)p 150 809 V 17 w(SEEK)p 263 809 V 16 w(SHARED$FH,)g(OFFSET,)
g(WHENCE$)170 866 y(INTEGER)g(FH,)h(WHENCE)170 922 y(INTEGER*8)f
(OFFSET)166 1008 y Fm(MPI)p 251 1008 14 2 v 16 w(SEEK)p
378 1008 V 16 w(SHARED)17 b Ft(up)q(dates)f(the)g(shared)g(\014le)h(p)q
(oin)o(ter)f(according)g(to)f Fm(whence)p Ft(,)i(whic)o(h)g(could)75
1065 y(ha)o(v)o(e)e(the)g(follo)o(wing)h(p)q(ossible)h(v)m(alues:)143
1154 y Fp(\017)23 b Fe(MPI)p 266 1154 13 2 v 14 w(SEEK)p
382 1154 V 14 w(SET)p Ft(:)15 b(the)h(p)q(oin)o(ter)f(is)h(set)f(to)f
Fm(o\013set)143 1246 y Fp(\017)23 b Fe(MPI)p 266 1246
V 14 w(SEEK)p 382 1246 V 14 w(CUR)p Ft(:)14 b(the)h(p)q(oin)o(ter)h(is)
g(set)f(to)f(the)h(curren)o(t)h(p)q(oin)o(ter)f(p)q(osition)i(plus)f
Fm(o\013set)143 1338 y Fp(\017)23 b Fe(MPI)p 266 1338
V 14 w(SEEK)p 382 1338 V 14 w(END)p Ft(:)15 b(the)h(p)q(oin)o(ter)f(is)
h(set)f(to)g(the)g(end)h(of)e(the)i(\014le)g(plus)g Fm(o\013set)166
1428 y Ft(All)d(the)f(pro)q(cesses)g(in)g(the)g(comm)o(unicator)g
(group)f(asso)q(ciated)h(with)g(the)g(\014le)h(handle)g
Fm(fh)f Ft(m)o(ust)f(call)75 1484 y Fm(MPI)p 160 1484
14 2 v 16 w(SEEK)p 287 1484 V 16 w(SHARED)18 b Ft(with)g(the)f(same)g
Fm(o\013set)g Ft(and)g Fm(whence)p Ft(.)27 b(All)19 b(pro)q(cesses)e
(in)h(the)f(comm)o(unicator)75 1541 y(group)e(are)g(sync)o(hronized)h
(with)g(a)f(barrier)g(b)q(efore)h(the)f(shared)g(\014le)h(p)q(oin)o
(ter)g(is)g(up)q(dated.)166 1597 y(The)c Fm(o\013set)g
Ft(is)g(relativ)o(e)h(to)e(the)h(\014let)o(yp)q(e)h($not)e(coun)o
(ting)i(holes$,)f(in)h(units)f(of)g Fm(et)o(yp)q(e)p
Ft(.)20 b(The)12 b(constan)o(t)75 1654 y Fe(MPI)p 152
1654 13 2 v 14 w(OFFSET)p 321 1654 V 14 w(ZERO)j Ft(is)h(de\014ned)g
(to)f(b)q(e)h(o\013set)e(zero.)75 1774 y Fl(11.5.4)49
b(Query)16 b(Sha)o(red)g(File)g(P)o(ointer)g(P)o(osition)75
1955 y Fm(MPI)p 160 1955 14 2 v 16 w(GET)p 264 1955 V
17 w(POSITION)p 490 1955 V 17 w(SHARED$fh,)f(o\013set,)g(b)o(yte)p
976 1955 V 18 w(o\013set$)117 2032 y Ff(IN)155 b Fm(fh)550
b Ff(V)m(alid)13 b(\014le)g(handle)h($handle$)117 2106
y(OUT)108 b Fm(o\013set)484 b Ff(Curren)o(t)15 b(\014le)f(o\013set)h
(in)e(et)o(yp)q(e)i(units)f($o\013set$)117 2180 y(OUT)108
b Fm(b)o(yte)p 400 2180 V 18 w(o\013set)387 b Ff(Curren)o(t)15
b(\014le)f(o\013set)h(in)e(b)o(ytes)i($o\013set$)75
2305 y Fh(int)23 b(MPI)p 245 2305 15 2 v 17 w(Get)p 334
2305 V 17 w(position)p 543 2305 V 16 w(shared$MPI)p
799 2305 V 16 w(File)g(fh,)h(MPI)p 1102 2305 V 16 w(Offset)f(*offset,)
393 2361 y(MPI)p 468 2361 V 17 w(Offset)g(*byte)p 772
2361 V 16 w(offset$)75 2448 y(int)g(MPI::File::Get)p
509 2448 V 16 w(position)p 717 2448 V 16 w(shared$MPI::Offset&)e
(offset,)393 2504 y(MPI::Offset&)h(byte)p 802 2504 V
17 w(offset$)75 2591 y(MPI)p 150 2591 V 17 w(GET)p 239
2591 V 17 w(POSITION)p 448 2591 V 16 w(SHARED$FH,)g(OFFSET,)h(BYTE)p
1013 2591 V 17 w(OFFSET$)170 2647 y(INTEGER)g(FH)170
2704 y(INTEGER*8)g(OFFSET,)g(BYTE)p 699 2704 V 17 w(OFFSET)1967
46 y Fo(1)1967 103 y(2)1967 159 y(3)1967 215 y(4)1967
272 y(5)1967 328 y(6)1967 385 y(7)1967 441 y(8)1967 498
y(9)1959 554 y(10)1959 611 y(11)1959 667 y(12)1959 724
y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
y(17)1959 1006 y(18)1959 1062 y(19)1959 1119 y(20)1959
1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 39 41
39 40 bop 75 -100 a Fk(11.6.)34 b(FILETYPE)15 b(CONSTR)o(UCTORS)992
b Ft(39)166 49 y Fm(MPI)p 251 49 14 2 v 16 w(GET)p 355
49 V 16 w(POSITION)p 580 49 V 17 w(SHARED)20 b Ft(returns)f(the)g
(curren)o(t)g(p)q(osition)g(of)g(the)g(shared)g(\014le)g(p)q(oin)o(ter)
75 106 y(in)f Fm(et)o(yp)q(e)g Ft(units)g(relativ)o(e)g(to)e(the)h
(curren)o(t)g(displacemen)o(t)i(and)e(\014let)o(yp)q(e)i(in)f
Fm(o\013set)p Ft(,)f(and)g(the)h(absolute)75 162 y(p)q(osition)e(in)g
(b)o(ytes)f(ignoring)h(the)f(displacemen)o(t)i(and)e(\014let)o(yp)q(e)i
(in)f Fm(b)o(yte)p 1331 162 V 17 w(o\013set)p Ft(.)414
b Fp(>)16 b Fo($Oct$)75 305 y Fq(11.6)60 b(Filet)n(yp)r(e)19
b(Constructo)n(rs)75 409 y Fl(11.6.1)49 b(Intro)q(duction)75
494 y Ft(Common)20 b(I/O)h(op)q(erations)f($e.g.,)h(rank-ordered)f
(blo)q(c)o(ks,)i(structured)f(arra)o(y)e(accesses,)j(etc.$)35
b(are)75 551 y(easily)20 b(expressed)g(using)g(the)f(previously)h
(de\014ned)h(read/write)e(op)q(erations)g(and)g(carefully)i(de\014ned)
75 607 y(\014let)o(yp)q(es.)i(In)17 b(order)f(to)f(simplify)j
(generation)e(of)g(common)f(\014let)o(yp)q(es,)i(the)f(follo)o(wing)h
Fm(MPI)e Ft(datat)o(yp)q(e)75 664 y(constructors)f(are)h(pro)o(vided.)
166 720 y(The)j(set)g(of)f(\014let)o(yp)q(es)i(created)f(b)o(y)g(a)g
(single)h(collectiv)o(e)h(\014let)o(yp)q(e)f(constructor)e(should)i(b)q
(e)f(used)75 777 y(together)c(when)i(op)q(ening)h(a)d(\014le.)166
833 y(Eac)o(h)20 b(new)h(\014let)o(yp)q(e)h(created)e
Fm(newt)o(yp)q(e)j Ft(consists)d(of)h(zero)f(or)g(more)g(copies)i(of)e
(the)g(base)h(t)o(yp)q(e)75 890 y Fm(oldt)o(yp)q(e)p
Ft(,)14 b(p)q(ossibly)h(separated)e(b)o(y)g(holes.)20
b(The)13 b(exten)o(t)g(of)f(the)h(new)h(\014let)o(yp)q(e)g(is)g(a)e
(nonnegativ)o(e)i(in)o(teger)75 946 y(m)o(ultiple)j(of)d(the)h(exten)o
(t)g(of)f(the)h(base)g(t)o(yp)q(e.)20 b(All)c(\014let)o(yp)q(e)g
(constructors)f(return)f(a)h(success)g(or)g(failure)75
1002 y(co)q(de.)75 1124 y Fl(11.6.2)49 b(Scatter)15 b(/)i(Gather)e(T)l
(yp)q(e)i(Constructo)o(rs)75 1210 y Fm(MPI)p 160 1210
V 16 w(T)l(yp)q(e)p 268 1210 V 17 w(scatter)p 412 1210
V 18 w(gather)75 1390 y(MPI)p 160 1390 V 16 w(TYPE)p
293 1390 V 17 w(SCA)l(TTER)p 508 1390 V 17 w(GA)l(THER$size,)f(rank,)f
(oldt)o(yp)q(e,)h(newt)o(yp)q(e$)117 1467 y Ff(IN)155
b Fm(size)519 b Ff([SAME])9 b(size)h(of)f(comm)o(unicator)d(used)k(in)f
(MPI)p 1658 1467 13 2 v 15 w(Op)q(en)i($non-)905 1524
y(negativ)o(e)j(in)o(teger$)117 1599 y(IN)155 b Fm(rank)504
b Ff(rank)18 b(in)f(comm)o(unicator)e(used)k(in)e(MPI)p
1566 1599 V 15 w(Op)q(en)i($nonnega-)905 1655 y(tiv)o(e)14
b(in)o(teger$)117 1731 y(IN)155 b Fm(oldt)o(yp)q(e)450
b Ff([SAME])14 b(old)f(datat)o(yp)q(e)h($handle$)117
1806 y(OUT)108 b Fm(newt)o(yp)q(e)433 b Ff(new)15 b(datat)o(yp)q(e)f
($handle$)75 1930 y Fh(int)23 b(MPI)p 245 1930 15 2
v 17 w(Type)p 358 1930 V 17 w(scatter)p 543 1930 V 16
w(gather$int)g(size,)g(int)g(rank,)g(MPI)p 1275 1930
V 17 w(Datatype)g(oldtype,)393 1987 y(MPI)p 468 1987
V 17 w(Datatype)g(*newtype$)75 2073 y(int)g(MPI::Datatype::Scatter)p
701 2073 V 15 w(gather$const)f(int)h(size,)g(const)h(int)f(rank,)393
2130 y(const)g(MPI::Datatype&)f(oldtype$)75 2216 y(MPI)p
150 2216 V 17 w(TYPE)p 263 2216 V 16 w(SCATTER)p 447
2216 V 17 w(GATHER$SIZE,)g(RANK,)h(OLDTYPE,)g(NEWTYPE,)g(IERROR$)170
2272 y(INTEGER)g(SIZE,)h(RANK,)f(OLDTYPE,)f(NEWTYPE,)h(IERROR)166
2359 y Ft(This)c(\014let)o(yp)q(e)g(allo)o(ws)f(eac)o(h)g(pro)q(cess)g
(of)g(a)f(comm)o(unicator)h(to)g(access)g(a)f(distinct)j
Fm(blo)q(ck)e Ft(of)g(the)75 2415 y(\014le)g(in)g(rank)e(order.)25
b(The)17 b(blo)q(c)o(ks)h(are)f(iden)o(tical)i(in)e(size)h(and)f(datat)
o(yp)q(e;)g(eac)o(h)g(item)h(is)f(of)f(datat)o(yp)q(e)75
2472 y Fm(oldt)o(yp)q(e)p Ft(.)166 2528 y(T)l(o)e(ac)o(hiev)o(e)h(the)f
(scatter)g(or)g(gather)f(op)q(eration,)i(the)f(\014les)i(op)q(ened)f
(with)g(the)f(returned)h(\014let)o(yp)q(es)75 2585 y(should)f(b)q(e)f
(accessed)g(with)g(collectiv)o(e)i(read)e(or)f(write)h(op)q(erations)f
(with)h(iden)o(tical)i(o\013sets.)j(Generated)75 2641
y(\014let)o(yp)q(es)e(ma)o(y)f(not)g(b)q(e)g(iden)o(tical,)i(but)e
(will)i(ha)o(v)o(e)e(the)g(same)g(exten)o(t.)-32 46 y
Fo(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272 y(5)-32
328 y(6)-32 385 y(7)-32 441 y(8)-32 498 y(9)-40 554 y(10)-40
611 y(11)-40 667 y(12)-40 724 y(13)-40 780 y(14)-40 836
y(15)-40 893 y(16)-40 949 y(17)-40 1006 y(18)-40 1062
y(19)-40 1119 y(20)-40 1175 y(21)-40 1232 y(22)-40 1288
y(23)-40 1345 y(24)-40 1401 y(25)-40 1457 y(26)-40 1514
y(27)-40 1570 y(28)-40 1627 y(29)-40 1683 y(30)-40 1740
y(31)-40 1796 y(32)-40 1853 y(33)-40 1909 y(34)-40 1966
y(35)-40 2022 y(36)-40 2078 y(37)-40 2135 y(38)-40 2191
y(39)-40 2248 y(40)-40 2304 y(41)-40 2361 y(42)-40 2417
y(43)-40 2474 y(44)-40 2530 y(45)-40 2587 y(46)-40 2643
y(47)-40 2699 y(48)p eop
%%Page: 40 42
40 41 bop 75 -100 a Ft(40)1342 b Fk(CHAPTER)15 b(11.)35
b(I/O)75 49 y Fm(MPI)p 160 49 14 2 v 16 w(T)l(yp)q(e)p
268 49 V 17 w(scatterv)p 433 49 V 18 w(gatherv)75 230
y(MPI)p 160 230 V 16 w(TYPE)p 293 230 V 17 w(SCA)l(TTERV)p
538 230 V 17 w(GA)l(THERV$size,)17 b(rank,)e(count,)h(oldt)o(yp)q(e,)g
(newt)o(yp)q(e$)117 307 y Ff(IN)155 b Fm(size)519 b
Ff([SAME])9 b(size)h(of)f(comm)o(unicator)d(used)k(in)f(MPI)p
1658 307 13 2 v 15 w(Op)q(en)i($non-)905 363 y(negativ)o(e)j(in)o
(teger$)117 438 y(IN)155 b Fm(rank)504 b Ff(rank)18
b(in)f(comm)o(unicator)e(used)k(in)e(MPI)p 1566 438 V
15 w(Op)q(en)i($nonnega-)905 495 y(tiv)o(e)14 b(in)o(teger$)117
570 y(IN)155 b Fm(count)482 b Ff(n)o(um)o(b)q(er)14 b(of)h(elemen)o(ts)
f(of)g(oldt)o(yp)q(e)h(in)g(this)f(blo)q(c)o(k)h($nonneg-)905
626 y(ativ)o(e)f(in)o(teger$)117 702 y(IN)155 b Fm(oldt)o(yp)q(e)450
b Ff(old)13 b(datat)o(yp)q(e)i($handle$)117 777 y(OUT)108
b Fm(newt)o(yp)q(e)433 b Ff(new)15 b(datat)o(yp)q(e)f($handle$)75
901 y Fh(int)23 b(MPI)p 245 901 15 2 v 17 w(Type)p 358
901 V 17 w(scatterv)p 567 901 V 16 w(gatherv$int)f(size,)h(int)h
(rank,)f(int)h(count,)393 958 y(MPI)p 468 958 V 17 w(Datatype)f
(oldtype,)f(MPI)p 986 958 V 17 w(Datatype)h(*newtype$)75
1044 y(int)g(MPI::Datatype::Scatterv)p 725 1044 V 14
w(gatherv$const)g(int)g(size,)g(const)g(int)h(rank,)393
1100 y(const)f(int)h(count,)f(MPI::Datatype&)f(oldtype$)75
1187 y(MPI)p 150 1187 V 17 w(TYPE)p 263 1187 V 16 w(SCATTERV)p
471 1187 V 16 w(GATHERV$SIZE,)h(RANK,)g(COUNT,)g(OLDTYPE,)g(NEWTYPE,)f
(IERROR$)170 1243 y(INTEGER)h(SIZE,)h(RANK,)f(COUNT,)g(OLDTYPE,)g
(NEWTYPE,)f(IERROR)166 1330 y Ft(This)c(t)o(yp)q(e)f(allo)o(ws)g(eac)o
(h)h(pro)q(cess)f(of)g(a)g(comm)o(unicator)f(to)h(access)g(a)g
(distinct)i Fj(blo)n(ck)d Ft(of)h(the)g(\014le)75 1386
y(in)e(rank)f(order)g(as)g(in)h(MPI)p 548 1386 14 2 v
17 w(T)o(yp)q(e)p 667 1386 V 17 w(scatter)p 819 1386
V 15 w(gather,)f(except)g(that)g(the)g(blo)q(c)o(k)i(sizes)f(and)f(t)o
(yp)q(es)h(ma)o(y)e(b)q(e)75 1443 y(di\013eren)o(t.)20
b(Eac)o(h)15 b(blo)q(c)o(k)h(is)g(de\014ned)g(as)f Fm(count)i
Ft(con)o(tiguous)e(copies)h(of)f(the)g(passed)g(datat)o(yp)q(e)g
Fm(oldt)o(yp)q(e)p Ft(.)75 1564 y Fl(11.6.3)49 b(Lo)q(cal)18
b(Arra)o(y)e(Filet)o(yp)q(e)g(Constructo)o(r)f($indep)q(endent$)75
1745 y Fm(MPI)p 160 1745 V 16 w(TYPE)p 293 1745 V 17
w(SUBARRA)l(Y$ndims,)i(sizes,)e(subsizes,)i(sta)o(rts,)f(o)o(rder,)e
(oldt)o(yp)q(e,)i(newt)o(yp)q(e$)117 1822 y Ff(IN)155
b Fm(ndims)476 b Ff(n)o(um)o(b)q(er)13 b(of)h(arra)o(y)f(dimensions)g
($nonnegativ)o(e)h(in)o(teger$)117 1897 y(IN)155 b
Fm(sizes)502 b Ff(size)15 b(of)e(the)i(full)d(arra)o(y)i(in)f(eac)o(h)i
(dimension)d($arra)o(y)i(of)f(non-)905 1954 y(negativ)o(e)h(in)o
(tegers$)117 2029 y(IN)155 b Fm(subsizes)439 b Ff(size)14
b(of)f(the)h(sub-arra)o(y)g(in)f(eac)o(h)h(dimension)e($arra)o(y)h(of)
g(non-)905 2085 y(negativ)o(e)h(in)o(tegers$)117 2160
y(IN)155 b Fm(sta)o(rts)484 b Ff(starting)18 b(co)q(ordinates)g(of)e
(the)i(sub-arra)o(y)g(in)f(eac)o(h)g(dimen-)905 2217
y(sion)d($arra)o(y)g(of)f(nonnegativ)o(e)g(in)o(tegers$)117
2292 y(IN)155 b Fm(o)o(rder)490 b Ff(arra)o(y)14 b(storage)g(order)h
(\015ag)e($in)o(teger$)117 2367 y(IN)155 b Fm(oldt)o(yp)q(e)450
b Ff(arra)o(y)14 b(elemen)o(t)f(datat)o(yp)q(e)h($handle$)117
2442 y(OUT)108 b Fm(newt)o(yp)q(e)433 b Ff(new)15 b(datat)o(yp)q(e)f
($handle$)75 2567 y Fh(int)23 b(MPI)p 245 2567 15 2
v 17 w(Type)p 358 2567 V 17 w(subarray$int)f(ndims,)h(int)h(*sizes,)e
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Ft(-dimensional)j(grid)e(of)f(logical)h(pro)q(ces-)75
162 y(sors.)18 b(F)l(or)10 b(a)g(call)h(to)f Fm(MPI)p
507 162 V 16 w(TYPE)p 640 162 V 17 w(D)o(ARRA)l(Y)i Ft(to)d(b)q(e)j
(correct,)e(the)h(equation)1365 130 y Fd(Q)1404 140 y
Fc(pdims)p Fb(\000)p Fa(1)1404 175 y Fc(i)p Fa(=0)1554
162 y Fi(psiz)r(es)p Ft([)p Fi(i)p Ft(])h(=)h Fi(siz)r(e)p
Ft(.)166 219 y(Eac)o(h)i(dimension)i(of)e(the)g(arra)o(y)f(is)i
(distributed)g(in)g(one)g(of)e(three)i(w)o(a)o(ys:)143
312 y Fp(\017)23 b Fe(MPI)p 266 312 13 2 v 14 w(DISTRIBUTE)p
522 312 V 13 w(BLOCK)15 b Ft(-)g(Blo)q(c)o(k)h(distribution)143
406 y Fp(\017)23 b Fe(MPI)p 266 406 V 14 w(DISTRIBUTE)p
522 406 V 13 w(CYCLIC)14 b Ft(-)h(Cyclic)i(distribution)143
500 y Fp(\017)23 b Fe(MPI)p 266 500 V 14 w(DISTRIBUTE)p
522 500 V 13 w(NONE)16 b Ft(-)f(Dimension)h(not)f(distributed.)166
594 y(T)l(o)e(sp)q(ecify)i(a)f(default)g(distribution)i(argumen)o(t,)c
(the)i(constan)o(t)f Fe(MPI)p 1365 594 V 14 w(DISTRIBUTE)p
1621 594 V 14 w(DFL)m(T)p 1736 594 V 15 w(ARG)f Ft(is)75
650 y(used.)20 b(The)c(distribution)h(argumen)o(t)d(for)h(a)g
(dimension)i(that)d(is)i(not)f(distributed)h(is)g(ignored.)166
707 y(F)l(or)j(example,)i(ARRA)l(Y$CYCLIC\(15$\))e(corresp)q(onds)h
(to)e Fe(MPI)p 1316 707 V 15 w(DISTRIBUTE)p 1573 707
V 13 w(CYCLIC)g Ft(with)h(a)75 763 y(distribution)13
b(argumen)o(t)d(of)h(15,)g(and)h(ARRA)l(Y$BLOCK$)h(corresp)q(onds)f
(to)e Fe(MPI)p 1471 763 V 15 w(DISTRIBUTE)p 1728 763
V 13 w(BLOCK)75 820 y Ft(with)16 b(a)e(distribution)j(argumen)o(t)e(of)
f Fe(MPI)p 796 820 V 15 w(DISTRIBUTE)p 1053 820 V 13
w(DFL)m(T)p 1167 820 V 15 w(ARG)p Ft(.)166 876 y(The)j
Fm(o)o(rder)f Ft(argumen)o(t)g(is)h(used)g(as)f(in)i
Fm(MPI)p 928 876 14 2 v 16 w(TYPE)p 1061 876 V 17 w(SUBARRA)l(Y)h
Ft(to)d(sp)q(ecify)i(the)f(storage)e(order)75 933 y(for)h(m)o
(ultidimensional)k(arra)o(ys.)k(Therefore,)17 b(arra)o(ys)f(describ)q
(ed)j(b)o(y)e(this)h(t)o(yp)q(e)f(constructor)f(ma)o(y)g(b)q(e)75
989 y(stored)11 b(in)h(ro)o(w-ma)s(jor)d(or)i(column-ma)s(jor)g(order.)
18 b(V)l(alid)13 b(v)m(alues)g(for)d Fm(o)o(rder)h Ft(are)g
Fe(MPI)p 1517 989 13 2 v 14 w(F)o(ORTRAN)p 1724 989 V
14 w(ORDER)75 1046 y Ft(or)k Fe(MPI)p 208 1046 V 14 w(C)p
249 1046 V 14 w(ORDER)p Ft(.)166 1102 y(F)l(or)f(example,)i(let)g(us)f
(generate)g(the)g(\014let)o(yp)q(es)i(corresp)q(onding)f(to)e(the)i
(HPF)e(distribution:)218 1196 y Fh(<oldtype>)23 b(FILEARRAY$100,)f
(200,)h(300$)75 1252 y(!HPF$)g(PROCESSORS)g(PROCESSES$2,)f(3$)75
1309 y(!HPF$)h(DISTRIBUTE)g(FILEARRAY$CYCLIC\(10$,)e(*,)i(BLOCK\))g
(ONTO)h(PROCESSES)75 1403 y Ft(This)13 b(can)g(b)q(e)g(ac)o(hiev)o(ed)g
(b)o(y)f(the)h(follo)o(wing)g(F)o(OR)l(TRAN)g(co)q(de,)g(assuming)g
(there)g(will)h(b)q(e)f(six)g(pro)q(cesses)75 1459 y(attac)o(hed)i(to)f
(the)h(run:)170 1553 y Fh(ndims)24 b(=)f(3)170 1609 y(dsizes$1$)g(=)h
(100)170 1666 y(distribs$1$)f(=)h(MPI_DISTRIBUTE_CYCLIC)170
1722 y(dargs$1$)f(=)h(10)170 1779 y(dsizes$2$)f(=)h(200)170
1835 y(distribs$2$)f(=)h(MPI_DISTRIBUTE_NONE)170 1892
y(dargs$2$)f(=)h(0)170 1948 y(dsizes$3$)f(=)h(300)170
2004 y(distribs$3$)f(=)h(MPI_DISTRIBUTE_BLOCK)170 2061
y(dargs$3$)f(=)h(MPI_DISTRIBUTE_DFLT_ARG)170 2117 y(pdims)g(=)f(2)170
2174 y(psizes$1$)g(=)h(2)170 2230 y(psizes$2$)f(=)h(3)170
2287 y(call)g(MPI_COMM_SIZE$MPI_COMM_W)o(ORLD,)d(size,)i(ierr$)170
2343 y(call)h(MPI_COMM_RANK$MPI_COMM_W)o(ORLD,)d(rank,)i(ierr$)170
2400 y(call)h(MPI_TYPE_DARRAY$size,)d(rank,)i(ndims,)g(dsizes,)g
(distribs,)g(dargs,)147 2456 y($)119 b(pdims,)23 b(psizes,)g
(MPI_FORTRAN_ORDER,)e(oldtype,)i(newtype,)g(ierr$)75
2576 y Fm(MPI)p 160 2576 14 2 v 16 w(T)l(yp)q(e)p 268
2576 V 17 w(da)o(rra)o(y)p 403 2576 V 15 w(2d)75 2662
y Ft(Distribution)16 b(of)f(a)g Fj(two)p Ft(-dimensional)j(arra)o(y:)
1967 46 y Fo(1)1967 103 y(2)1967 159 y(3)1967 215 y(4)1967
272 y(5)1967 328 y(6)1967 385 y(7)1967 441 y(8)1967 498
y(9)1959 554 y(10)1959 611 y(11)1959 667 y(12)1959 724
y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
y(17)1959 1006 y(18)1959 1062 y(19)1959 1119 y(20)1959
1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 45 47
45 46 bop 75 -100 a Fk(11.6.)29 b(FILETYPE)15 b(CONSTR)o(UCTORS)997
b Ft(45)75 49 y Fm(MPI)p 160 49 14 2 v 16 w(TYPE)p 293
49 V 17 w(D)o(ARRA)l(Y)p 486 49 V 17 w(2D$size,)25 b(rank,)g(dsize1,)g
(distrib1,)g(da)o(rg1,)f(psize1,)h(dsize2,)h(distrib2,)f(da)o(rg2,)75
106 y(psize2,)15 b(o)o(rder,)f(oldt)o(yp)q(e,)i(newt)o(yp)q(e$)117
183 y Ff(IN)155 b Fm(size)519 b Ff([SAME])9 b(size)h(of)f(comm)o
(unicator)d(used)k(in)f(MPI)p 1658 183 13 2 v 15 w(Op)q(en)i($non-)905
239 y(negativ)o(e)j(in)o(teger$)117 315 y(IN)155 b Fm(rank)504
b Ff(rank)18 b(in)f(comm)o(unicator)e(used)k(in)e(MPI)p
1566 315 V 15 w(Op)q(en)i($nonnega-)905 371 y(tiv)o(e)14
b(in)o(teger$)117 446 y(IN)155 b Fm(dsize1)473 b Ff([SAME])21
b(size)g(of)f(distributed)i(arra)o(y)f(in)f(\014rst)i(dimension)905
503 y($nonnegativ)o(e)14 b(in)o(teger$)117 578 y(IN)155
b Fm(distrib1)447 b Ff([SAME])14 b(distribution)f(for)h(\014rst)g
(dimension)e($in)o(teger$)117 653 y(IN)155 b Fm(da)o(rg1)481
b Ff([SAME])12 b(distribution)g(argumen)o(t)f(for)h(\014rst)h
(dimension)d($in-)905 709 y(teger$)117 784 y(IN)155
b Fm(psize1)473 b Ff([SAME])12 b(size)i(of)e(pro)q(cessor)j(grid)d(in)g
(\014rst)i(dimension)d($in)o(te-)905 841 y(ger$)117
916 y(IN)155 b Fm(dsize2)473 b Ff([SAME])14 b(size)g(of)g(distributed)g
(arra)o(y)g(in)g(second)h(dimension)905 972 y($nonnegativ)o(e)f(in)o
(teger$)117 1048 y(IN)155 b Fm(distrib2)447 b Ff([SAME])14
b(distribution)f(for)h(second)g(dimension)f($in)o(teger$)117
1123 y(IN)155 b Fm(da)o(rg2)481 b Ff([SAME])18 b(distribution)f
(argumen)o(t)g(for)h(second)h(dimension)905 1179 y($in)o(teger$)117
1254 y(IN)155 b Fm(psize2)473 b Ff([SAME])11 b(size)g(of)g(pro)q
(cessor)h(grid)f(in)f(second)i(dimension)d($in-)905
1311 y(teger$)117 1386 y(IN)155 b Fm(o)o(rder)490 b
Ff([SAME])14 b(arra)o(y)f(storage)i(order)f(\015ag)g($in)o(teger$)117
1461 y(IN)155 b Fm(oldt)o(yp)q(e)450 b Ff([SAME])14 b(old)f(datat)o(yp)
q(e)h($handle$)117 1536 y(OUT)108 b Fm(newt)o(yp)q(e)433
b Ff(new)15 b(datat)o(yp)q(e)f($handle$)75 1661 y Fh(int)23
b(MPI)p 245 1661 15 2 v 17 w(Type)p 358 1661 V 17 w(darray)p
519 1661 V 16 w(2d$int)g(size,)g(int)h(rank,)f(int)h(dsize1,)e(int)i
(distrib1,)393 1717 y(int)g(darg1,)f(int)g(psize1,)g(int)g(dsize2,)g
(int)h(distrib2,)e(int)i(darg2,)393 1774 y(int)g(psize2,)f(int)g
(order,)g(MPI)p 1017 1774 V 17 w(Datatype)g(oldtype,)393
1830 y(MPI)p 468 1830 V 17 w(Datatype)g(*newtype$)75
1916 y(int)g(MPI::Datatype::Darray)p 677 1916 V 15 w(2d$const)g(int)g
(size,)g(const)g(int)h(rank,)f(int)g(dsize1,)393 1973
y(int)h(distrib1,)e(int)i(darg1,)f(int)g(psize1,)g(int)h(dsize2,)e(int)
i(distrib2,)393 2029 y(int)g(darg2,)f(int)g(psize2,)g(int)g(order,)393
2086 y(const)g(MPI::Datatype&)f(oldtype$)75 2172 y(MPI)p
150 2172 V 17 w(TYPE)p 263 2172 V 16 w(DARRAY)p 423 2172
V 17 w(2D$SIZE,)h(RANK,)g(DSIZE1,)g(DISTRIB1,)f(DARG1,)h(PSIZE1,)g
(DSIZE2,)393 2229 y(DISTRIB2,)g(DARG2,)g(PSIZE2,)g(ORDER,)g(OLDTYPE,)g
(NEWTYPE,)f(IERROR$)170 2285 y(INTEGER)h(SIZE,)h(RANK,)f(DSIZE1,)g
(DISTRIB1,)f(DARG1,)h(PSIZE1,)g(DSIZE2,)g(DISTRIB2,)170
2342 y(DARG2)170 2398 y(INTEGER)g(PSIZE2,)g(ORDER,)g(OLDTYPE,)g
(NEWTYPE,)g(IERROR)166 2485 y Ft(This)12 b(call)h(is)g(a)e(shorthand)h
(for)f(the)h(t)o(w)o(o-dimensional)h(distributed)g(arra)o(y)e(case)h
(and)g(is)g(equiv)m(alen)o(t)75 2541 y(to:)170 2635 y
Fh(dsize[0]=dsize1;)22 b(distrib[0]=distrib1;)f(dargs[0]=darg1;)h
(psize[0])h(=)h(psize1;)170 2691 y(dsize[1]=dsize2;)e
(distrib[1]=distrib2;)f(dargs[1]=darg2;)h(psize[1])h(=)h(psize2;)-32
46 y Fo(1)-32 103 y(2)-32 159 y(3)-32 215 y(4)-32 272
y(5)-32 328 y(6)-32 385 y(7)-32 441 y(8)-32 498 y(9)-40
554 y(10)-40 611 y(11)-40 667 y(12)-40 724 y(13)-40 780
y(14)-40 836 y(15)-40 893 y(16)-40 949 y(17)-40 1006
y(18)-40 1062 y(19)-40 1119 y(20)-40 1175 y(21)-40 1232
y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40 1457
y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40 1683
y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40 1909
y(34)-40 1966 y(35)-40 2022 y(36)-40 2078 y(37)-40 2135
y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40 2361
y(42)-40 2417 y(43)-40 2474 y(44)-40 2530 y(45)-40 2587
y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Page: 46 48
46 47 bop 75 -100 a Ft(46)1342 b Fk(CHAPTER)15 b(11.)35
b(I/O)170 49 y Fh(MPI_Type_darray$size,)21 b(rank,)j(2,)f(dsize,)g
(distrib,)g(dargs,)g(2,)h(psize,)576 106 y(order,)f(oldtype,)g
(&newtype$;)75 226 y Fm(MPI)p 160 226 14 2 v 16 w(T)l(yp)q(e)p
268 226 V 17 w(da)o(rra)o(y)p 403 226 V 15 w(blo)q(ck)75
312 y Ft(BLOCK)16 b(distribution)h(of)e(a)g(one-dimensional)i(arra)o
(y:)75 463 y Fm(MPI)p 160 463 V 16 w(TYPE)p 293 463 V
17 w(D)o(ARRA)l(Y)p 486 463 V 17 w(BLOCK$size,)e(rank,)g(dsize,)g(da)o
(rg,)g(oldt)o(yp)q(e,)g(newt)o(yp)q(e$)117 540 y Ff(IN)155
b Fm(size)519 b Ff([SAME])9 b(size)h(of)f(comm)o(unicator)d(used)k(in)f
(MPI)p 1658 540 13 2 v 15 w(Op)q(en)i($non-)905 596
y(negativ)o(e)j(in)o(teger$)117 671 y(IN)155 b Fm(rank)504
b Ff(rank)18 b(in)f(comm)o(unicator)e(used)k(in)e(MPI)p
1566 671 V 15 w(Op)q(en)i($nonnega-)905 728 y(tiv)o(e)14
b(in)o(teger$)117 803 y(IN)155 b Fm(dsize)496 b Ff([SAME])10
b(size)h(of)f(distributed)h(arra)o(y)f($nonnegativ)o(e)g(in)o(teger$)
117 878 y(IN)155 b Fm(da)o(rg)504 b Ff([SAME])21 b(distribution)f
(argumen)o(t,)i(e.g.)39 b(BLOCK$darg$)905 935 y($in)o(teger$)117
1010 y(IN)155 b Fm(oldt)o(yp)q(e)450 b Ff([SAME])14 b(old)f(datat)o(yp)
q(e)h($handle$)117 1085 y(OUT)108 b Fm(newt)o(yp)q(e)433
b Ff(new)15 b(datat)o(yp)q(e)f($handle$)75 1209 y Fh(int)23
b(MPI)p 245 1209 15 2 v 17 w(Type)p 358 1209 V 17 w(darray)p
519 1209 V 16 w(block$int)g(size,)g(int)g(rank,)h(int)f(dsize,)g(int)h
(darg,)393 1266 y(MPI)p 468 1266 V 17 w(Datatype)f(oldtype,)f(MPI)p
986 1266 V 17 w(Datatype)h(*newtype$)75 1352 y(int)g
(MPI::Datatype::Darray)p 677 1352 V 15 w(block$const)f(int)i(size,)f
(const)g(int)g(rank,)h(int)f(dsize,)393 1409 y(int)h(darg,)f(const)g
(MPI::Datatype&)f(oldtype$)75 1495 y(MPI)p 150 1495
V 17 w(TYPE)p 263 1495 V 16 w(DARRAY)p 423 1495 V 17
w(BLOCK$SIZE,)g(RANK,)h(DSIZE,)g(DARG,)h(OLDTYPE,)e(NEWTYPE,)h
(IERROR$)170 1552 y(INTEGER)g(SIZE,)h(RANK,)f(DSIZE,)g(DARG,)g
(OLDTYPE,)g(NEWTYPE,)f(IERROR)166 1638 y Fm(MPI)p 251
1638 14 2 v 16 w(TYPE)p 384 1638 V 17 w(D)o(ARRA)l(Y)p
577 1638 V 17 w(BLOCK)14 b Ft(generates)f(the)h(\014let)o(yp)q(es)g
(corresp)q(onding)h(to)e(the)g(BLOCK)i(dis-)75 1694 y(tribution)h(of)f
(a)g(one-dimensional)i Fm(dsize)f Ft(elemen)o(t)g(arra)o(y)e(of)h
Fm(oldt)o(yp)q(e)p Ft(.)166 1751 y(This)h(call)g(is)g(a)f(shorthand)g
(for:)170 1845 y Fh(MPI_Comm_size$comm,)22 b(&size$;)170
1901 y(MPI_Comm_rank$comm,)g(&rank$;)170 1958 y(distrib)h(=)h
(MPI_DISTRIBUTE_BLOCK;)170 2014 y(MPI_Type_darray$size,)d(rank,)j(1,)f
(dsize,)g(distrib,)g(darg,)g(1,)h(size,)576 2071 y(order,)f(oldtype,)g
(&newtype$;)166 2164 y Ft(Note)10 b(that)f(order)h(is)h(not)e(sp)q
(eci\014ed)k(for)c(this)i(constructor,)f(nor)g(for)f
Fm(MPI)p 1395 2164 V 16 w(TYPE)p 1528 2164 V 17 w(D)o(ARRA)l(Y)p
1721 2164 V 18 w(CYCLIC)p Ft(,)75 2221 y(b)q(ecause)16
b(it)g(is)f(not)g(meaningful)i(for)d(1D)h(arra)o(ys.)75
2341 y Fm(MPI)p 160 2341 V 16 w(T)l(yp)q(e)p 268 2341
V 17 w(da)o(rra)o(y)p 403 2341 V 15 w(cyclic)75 2427
y Ft(CYCLIC)h(distribution)g(of)f(a)g(one-dimensional)j(arra)o(y:)1967
46 y Fo(1)1967 103 y(2)1967 159 y(3)1967 215 y(4)1967
272 y(5)1967 328 y(6)1967 385 y(7)1967 441 y(8)1967 498
y(9)1959 554 y(10)1959 611 y(11)1959 667 y(12)1959 724
y(13)1959 780 y(14)1959 836 y(15)1959 893 y(16)1959 949
y(17)1959 1006 y(18)1959 1062 y(19)1959 1119 y(20)1959
1175 y(21)1959 1232 y(22)1959 1288 y(23)1959 1345 y(24)1959
1401 y(25)1959 1457 y(26)1959 1514 y(27)1959 1570 y(28)1959
1627 y(29)1959 1683 y(30)1959 1740 y(31)1959 1796 y(32)1959
1853 y(33)1959 1909 y(34)1959 1966 y(35)1959 2022 y(36)1959
2078 y(37)1959 2135 y(38)1959 2191 y(39)1959 2248 y(40)1959
2304 y(41)1959 2361 y(42)1959 2417 y(43)1959 2474 y(44)1959
2530 y(45)1959 2587 y(46)1959 2643 y(47)1959 2699 y(48)p
eop
%%Page: 47 49
47 48 bop 75 -100 a Fk(11.7.)34 b(I/O)15 b(ERR)o(OR)i(CLASSES)1155
b Ft(47)75 49 y Fm(MPI)p 160 49 14 2 v 16 w(TYPE)p 293
49 V 17 w(D)o(ARRA)l(Y)p 486 49 V 17 w(CYCLIC$size,)15
b(rank,)g(dsize,)g(da)o(rg,)f(oldt)o(yp)q(e,)i(newt)o(yp)q(e$)117
126 y Ff(IN)155 b Fm(size)519 b Ff([SAME])9 b(size)h(of)f(comm)o
(unicator)d(used)k(in)f(MPI)p 1658 126 13 2 v 15 w(Op)q(en)i($non-)905
183 y(negativ)o(e)j(in)o(teger$)117 258 y(IN)155 b Fm(rank)504
b Ff(rank)18 b(in)f(comm)o(unicator)e(used)k(in)e(MPI)p
1566 258 V 15 w(Op)q(en)i($nonnega-)905 315 y(tiv)o(e)14
b(in)o(teger$)117 390 y(IN)155 b Fm(dsize)496 b Ff([SAME])10
b(size)h(of)f(distributed)h(arra)o(y)f($nonnegativ)o(e)g(in)o(teger$)
117 465 y(IN)155 b Fm(da)o(rg)504 b Ff([SAME])19 b(distribution)f
(argumen)o(t,)h(e.g.)34 b(CYCLIC$darg$)905 521 y($in)o(teger$)117
596 y(IN)155 b Fm(oldt)o(yp)q(e)450 b Ff([SAME])14 b(old)f(datat)o(yp)q
(e)h($handle$)117 672 y(OUT)108 b Fm(newt)o(yp)q(e)433
b Ff(new)15 b(datat)o(yp)q(e)f($handle$)75 796 y Fh(int)23
b(MPI)p 245 796 15 2 v 17 w(Type)p 358 796 V 17 w(darray)p
519 796 V 16 w(cyclic$int)g(size,)g(int)g(rank,)h(int)f(dsize,)g(int)g
(darg,)393 852 y(MPI)p 468 852 V 17 w(Datatype)g(oldtype,)f(MPI)p
986 852 V 17 w(Datatype)h(*newtype$)75 939 y(int)g
(MPI::Datatype::Darray)p 677 939 V 15 w(cyclic$const)f(int)h(size,)h
(const)f(int)g(rank,)g(int)h(dsize,)393 995 y(int)g(darg,)f(const)g
(MPI::Datatype&)f(oldtype$)75 1082 y(MPI)p 150 1082
V 17 w(TYPE)p 263 1082 V 16 w(DARRAY)p 423 1082 V 17
w(CYCLIC$SIZE,)g(RANK,)h(DSIZE,)g(DARG,)g(OLDTYPE,)g(NEWTYPE,)g
(IERROR$)170 1138 y(INTEGER)g(SIZE,)h(RANK,)f(DSIZE,)g(DARG,)g
(OLDTYPE,)g(NEWTYPE,)f(IERROR\))166 1225 y Fm(MPI)p 251
1225 14 2 v 16 w(TYPE)p 384 1225 V 17 w(D)o(ARRA)l(Y)p
577 1225 V 17 w(CYCLIC)11 b Ft(generates)g(the)g(\014let)o(yp)q(es)i
(corresp)q(onding)f(to)e(the)h(CYCLIC)h(dis-)75 1281
y(tribution)k(of)f(a)g(one-dimensional)i Fm(dsize)f Ft(elemen)o(t)g
(arra)o(y)e(of)h Fm(oldt)o(yp)q(e)p Ft(.)166 1338 y(This)h(call)g(is)g
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eop
%%Page: 49 51
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1006 y(18)-40 1062 y(19)-40 1119 y(20)-40 1175 y(21)-40
1232 y(22)-40 1288 y(23)-40 1345 y(24)-40 1401 y(25)-40
1457 y(26)-40 1514 y(27)-40 1570 y(28)-40 1627 y(29)-40
1683 y(30)-40 1740 y(31)-40 1796 y(32)-40 1853 y(33)-40
1909 y(34)-40 1966 y(35)-40 2022 y(36)-40 2078 y(37)-40
2135 y(38)-40 2191 y(39)-40 2248 y(40)-40 2304 y(41)-40
2361 y(42)-40 2417 y(43)-40 2474 y(44)-40 2530 y(45)-40
2587 y(46)-40 2643 y(47)-40 2699 y(48)p eop
%%Trailer
end
userdict /end-hook known{end-hook}if
%%EOF

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