-
Notifications
You must be signed in to change notification settings - Fork 88
/
test_io.F90
212 lines (170 loc) · 7.24 KB
/
test_io.F90
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
!lessons: (1) do NOT change the vars being sednt/recv while send/recv is on-going to avoid mem corruption. Try copying
! to another var.
! mpif90 -cpp -O2 -mcmodel=medium -assume byterecl -g -traceback -o test_io test_io.F90
! mpif90 -O3 -xSKYLAKE-AVX512 -mtune=skylake -fma -init=zero -align array64byte -finline-functions -o test_io test_io.F90
program test_io
implicit none
include 'mpif.h'
integer,parameter :: nvrt=40
integer,parameter :: np=1000
! integer,parameter :: mnp=10000000 !global combined max
character(len=10) :: errchar
integer :: ierr,comm_schism,comm2,comm,nproc_schism,myrank_schism,task_id,i,j,k,m,it
integer :: comm_scribe,nscribes,nproc_compute,nproc,myrank,np_gb
integer :: nsteps,nspool,irank,noutvars,itag
integer,allocatable :: srqst(:),rrqst(:)
real*8 :: dt,tmp,tmp_gb,tmp1
real*8 :: work(1000), ar1(nvrt,np),ar2(nvrt,np)
real*8, allocatable :: ar1_gb(:,:,:),ar2_gb(:,:,:),ar3(:,:,:)
CALL MPI_Init(ierr)
call mpi_comm_dup(MPI_COMM_WORLD,comm_schism,ierr)
CALL MPI_Comm_size(comm_schism, nproc_schism, ierr)
CALL MPI_Comm_rank(comm_schism, myrank_schism,ierr)
! print*, 'hello from rank ',myrank_world,nproc_world
nscribes=4
nproc_compute=nproc_schism-nscribes
if(myrank_schism<nproc_schism-nscribes) then !compute ranks
task_id=1
else !IO ranks
task_id=2
endif
!Use original rank as key to order the new ranks
CALL MPI_Comm_split(comm_schism,task_id,myrank_schism,comm2,ierr)
CALL MPI_Comm_size(comm2, nproc, ierr)
CALL MPI_Comm_rank(comm2, myrank,ierr)
!comm world IDs are unreliable
print*, 'Ranks:',myrank_schism,nproc_schism,myrank,nproc,comm2,task_id
call mpi_barrier(comm_schism,ierr)
!if(myrank_schism<nproc_schism-nscribes) then !compute ranks
if(task_id==1) then !compute ranks
comm=comm2
if(nproc_compute/=nproc) call mpi_abort(comm_schism,'nproc mismatch',ierr)
if(myrank+1>nproc_compute) call mpi_abort(comm_schism,'>nproc_compute',ierr)
!Time step info
dt=100.
nsteps=21
nspool=5
noutvars=2
if(noutvars>nscribes) call mpi_abort(comm_schism,'>nscribes',ierr)
allocate(srqst(noutvars),ar3(nvrt,np,noutvars),stat=i)
if(i/=0) call mpi_abort(comm_schism,'alloc(1)',ierr)
!Init
srqst(:)=MPI_REQUEST_NULL
!Send basic info to IO scribes
if(myrank_schism==nproc_schism-nscribes-1) then
do i=1,nscribes
call mpi_send(dt,1,MPI_REAL8,nproc_schism-i,10,comm_schism,ierr)
call mpi_send(nsteps,1,MPI_INTEGER,nproc_schism-i,12,comm_schism,ierr)
call mpi_send(nspool,1,MPI_INTEGER,nproc_schism-i,13,comm_schism,ierr)
call mpi_send(noutvars,1,MPI_INTEGER,nproc_schism-i,15,comm_schism,ierr)
enddo !i
endif
do it=1,nsteps
print*, 'Doing step ',it,myrank,comm,myrank_schism,nproc
!WARNING: cannot compute arrays while the send is still on-going
! do j=1,noutvars
! !Make sure the previous send is finished
! call mpi_wait(srqst(j),MPI_STATUS_IGNORE,ierr)
! enddo !j
! call mpi_waitall(noutvars,srqst,MPI_STATUSES_IGNORE,ierr)
!In btw output steps, srqst is NULL, but reset just in case
! srqst=MPI_REQUEST_NULL
do i=1,np
do k=1,nvrt
ar1(k,i)=k+i+myrank+it
enddo !k
enddo !i
ar2=ar1*0.5d0
! call mpi_barrier(comm,ierr)
if(mod(it,nspool)==0) then
do j=1,noutvars
print*, 'Sending to rank',nproc_schism-j,' from rank:',myrank_schism,it
if(j==1) then
!Make sure the previous send is finished
call mpi_wait(srqst(j),MPI_STATUS_IGNORE,ierr)
!Copy send array to allow continuation of computation next step
ar3(:,:,j)=ar1
call mpi_isend(ar3(:,:,j),np*nvrt,MPI_REAL8,nproc_schism-j,100+j,comm_schism,srqst(j),ierr)
else
call mpi_wait(srqst(j),MPI_STATUS_IGNORE,ierr)
ar3(:,:,j)=ar2
call mpi_isend(ar3(:,:,j),np*nvrt,MPI_REAL8,nproc_schism-j,100+j,comm_schism,srqst(j),ierr)
endif
! call mpi_wait(srqst(j),MPI_STATUS_IGNORE,ierr)
!print*, 'Sent to rank',nproc_schism-j,' from rank:',myrank_schism,it
enddo !j
!can do compute here as long as the send arrays are not altered
! do j=1,noutvars
! call mpi_wait(srqst(j),MPI_STATUS_IGNORE,ierr)
! enddo !j
! if(ierr/=MPI_SUCCESS) call mpi_abort(comm_schism,'send error',ierr)
endif !mod()
call mpi_barrier(comm,ierr)
enddo !it
print*, 'Done computing...',myrank
else !IO ranks
comm_scribe=comm2
allocate(ar1_gb(nvrt,np,nproc_compute),ar2_gb(nvrt,np,nproc_compute))
allocate(rrqst(nproc_compute),stat=i)
if(i/=0) call mpi_abort(comm_schism,'alloc(1)',ierr)
!Get basic info
call mpi_recv(dt,1,MPI_REAL8,nproc_schism-nscribes-1,10,comm_schism,rrqst(1),ierr)
call mpi_recv(nsteps,1,MPI_INTEGER,nproc_schism-nscribes-1,12,comm_schism,rrqst(1),ierr)
call mpi_recv(nspool,1,MPI_INTEGER,nproc_schism-nscribes-1,13,comm_schism,rrqst(1),ierr)
call mpi_recv(noutvars,1,MPI_INTEGER,nproc_schism-nscribes-1,15,comm_schism,rrqst(1),ierr)
! call mpi_barrier(comm_scribe,ierr)
print*, 'Scribe ',myrank,comm_scribe,myrank_schism
print*, 'Scribe, basic info:',dt,nsteps,nspool,noutvars,nproc_compute
do it=1,nsteps
!--------------------------------------------------------------------------
if(mod(it,nspool)/=0) cycle
print*, 'Scribe start recv...',it,myrank
do j=1,noutvars
if(myrank_schism==nproc_schism-j) then
do i=1,nproc_compute
call mpi_irecv(ar1_gb(:,:,i),np*nvrt,MPI_REAL8,i-1,100+j,comm_schism,rrqst(i),ierr)
! write(errchar,'(i10)')i
! if(ierr/=MPI_SUCCESS) call mpi_abort(comm_schism,errchar,ierr)
enddo !i
else
rrqst(:)=MPI_REQUEST_NULL
endif
call mpi_waitall(nproc_compute,rrqst,MPI_STATUSES_IGNORE,ierr)
if(ierr/=MPI_SUCCESS) call mpi_abort(comm_schism,'receive error',ierr)
print*, 'Scribe recv var:',it,j,myrank
enddo !j
print*, 'Scribe done recv var:',it,myrank
if(myrank_schism==nproc_schism-1) then
do i=1,nproc_compute
write(98,*)'Time=',it*dt,'Compute rank ',i-1,ar1_gb(:,:,i)
do m=1,np
do k=1,nvrt
if(abs(ar1_gb(k,m,i)-k-m-(i-1)-it)>1.d-5) write(97,*)'Mismatch:',i,m,k,it,ar1_gb(k,m,i),k+m+(i-1)+it
enddo !k
enddo !m
enddo !i
else if(myrank_schism==nproc_schism-2) then
do i=1,nproc_compute
write(99,*)'Time=',it*dt,'Compute rank ',i-1,ar1_gb(:,:,i)
do m=1,np
do k=1,nvrt
if(abs(ar1_gb(k,m,i)*2.d0-k-m-(i-1)-it)>1.d-5) write(96,*)'Mismatch:',i,m,k,it,ar1_gb(k,m,i)*2
enddo !k
enddo !m
enddo !i
endif !myrank_schism
print*, 'Scribe done writing ',it,myrank
call mpi_barrier(comm_scribe,ierr)
!--------------------------------------------------------------------------
enddo !it
endif !task_id
! call MPI_Comm_free(comm_schism,ierr)
! call MPI_Comm_free(comm2,ierr)
! call MPI_Comm_free(comm,ierr)
! call MPI_Comm_free(comm_scribe,ierr)
call mpi_barrier(comm_schism,ierr)
print*, 'Out of main time loop ',myrank_schism
call mpi_finalize(ierr)
if(ierr/=MPI_SUCCESS) call mpi_abort(comm_schism,'failed to finalize',ierr)
stop
end program