Я новичок в mpi4py. Я написал код для обработки большого массива numpy data
несколькими процессорами. Поскольку я не могу предоставить входной файл, я упоминаю форму data
. Форма data
- [3000000,15] и содержит строковый тип данных.mpi4py Gatherv лицом KeyError: '0'
from mpi4py import MPI
import numpy as np
import datetime as dt
import math as math
comm = MPI.COMM_WORLD
numprocs = comm.size
rank = comm.Get_rank()
fname = "6.binetflow"
data = np.loadtxt(open(fname,"rb"), dtype=object, delimiter=",", skiprows=1)
X = data[:,[0,1,3,14,6,6,6,6,6,6,6,6]]
num_rows = math.ceil(len(X)/float(numprocs))
X = X.flatten()
sendCounts = list()
displacements = list()
for p in range(numprocs):
if p == (numprocs-1): #for last processor
sendCounts.append(int(len(X) - (p*num_rows*12)))
displacements.append(int(p*num_rows*12))
break
sendCounts.append(int(num_rows*12))
displacements.append(int(p*sendCounts[p]))
sendbuf = np.array(X[displacements[rank]: (displacements[rank]+sendCounts[rank])])
## Each processor will do some task on sendbuf
if rank == 0:
recvbuf = np.empty(sum(sendCounts), dtype=object)
else:
recvbuf = None
print("sendbuf: ",sendbuf)
comm.Gatherv(sendbuf=sendbuf, recvbuf=(recvbuf, sendCounts), root=0)
if rank == 0:
print("Gathered array: {}".format(recvbuf))
Но я столкнулся ниже ошибки:
Traceback (most recent call last):
File "hello.py", line 36, in <module>
comm.Gatherv(sendbuf=sendbuf, recvbuf=(recvbuf, sendCounts), root=0)
File "MPI/Comm.pyx", line 602, in mpi4py.MPI.Comm.Gatherv (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:97993)
File "MPI/msgbuffer.pxi", line 525, in mpi4py.MPI._p_msg_cco.for_gather (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:34678)
File "MPI/msgbuffer.pxi", line 446, in mpi4py.MPI._p_msg_cco.for_cco_send (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:33938)
File "MPI/msgbuffer.pxi", line 148, in mpi4py.MPI.message_simple (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:30349)
File "MPI/msgbuffer.pxi", line 93, in mpi4py.MPI.message_basic (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:29448)
KeyError: 'O'
Traceback (most recent call last):
File "hello.py", line 36, in <module>
comm.Gatherv(sendbuf=sendbuf, recvbuf=(recvbuf, sendCounts), root=0)
File "MPI/Comm.pyx", line 602, in mpi4py.MPI.Comm.Gatherv (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:97993)
File "MPI/msgbuffer.pxi", line 525, in mpi4py.MPI._p_msg_cco.for_gather (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:34678)
File "MPI/msgbuffer.pxi", line 446, in mpi4py.MPI._p_msg_cco.for_cco_send (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:33938)
File "MPI/msgbuffer.pxi", line 148, in mpi4py.MPI.message_simple (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:30349)
File "MPI/msgbuffer.pxi", line 93, in mpi4py.MPI.message_basic (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:29448)
KeyError: 'O'
Traceback (most recent call last):
File "hello.py", line 36, in <module>
comm.Gatherv(sendbuf=sendbuf, recvbuf=(recvbuf, sendCounts), root=0)
File "MPI/Comm.pyx", line 602, in mpi4py.MPI.Comm.Gatherv (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:97993)
File "MPI/msgbuffer.pxi", line 525, in mpi4py.MPI._p_msg_cco.for_gather (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:34678)
File "MPI/msgbuffer.pxi", line 446, in mpi4py.MPI._p_msg_cco.for_cco_send (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:33938)
File "MPI/msgbuffer.pxi", line 148, in mpi4py.MPI.message_simple (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:30349)
File "MPI/msgbuffer.pxi", line 93, in mpi4py.MPI.message_basic (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:29448)
KeyError: 'O'
Traceback (most recent call last):
File "hello.py", line 36, in <module>
comm.Gatherv(sendbuf=sendbuf, recvbuf=(recvbuf, sendCounts), root=0)
File "MPI/Comm.pyx", line 602, in mpi4py.MPI.Comm.Gatherv (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:97993)
File "MPI/msgbuffer.pxi", line 516, in mpi4py.MPI._p_msg_cco.for_gather (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:34587)
File "MPI/msgbuffer.pxi", line 466, in mpi4py.MPI._p_msg_cco.for_cco_recv (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:34097)
File "MPI/msgbuffer.pxi", line 261, in mpi4py.MPI.message_vector (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:31977)
File "MPI/msgbuffer.pxi", line 93, in mpi4py.MPI.message_basic (d:\build\mpi4py\mpi4py-2.0.0\src\mpi4py.MPI.c:29448)
KeyError: 'O'
Любая помощь будет оценена. Я застрял в этой проблеме в течение длительного времени.
Благодаря