Fatal Error In Mpi_send Invalid Rank
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Fatal Error In Mpi_irecv: Invalid Rank, Error Stack
Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation mpi error invalid rank Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up MPI simple data transfer program up vote 1 down vote favorite 2 I'm supposed to send some integer number from one processor to another, and it is to be done on shell server from my university... First I created my solution code, which is going to look like (at least I think so...) #include #include int main(int argc, char **argv) { int currentRank = -1; MPI_Init(&argc, &argv); MPI_Comm_rank(MPI_COMM_WORLD, ¤tRank); if(currentRank == 0) { int numberToSend = 1; MPI_Send(&numberToSend , 1, MPI_INT, 1, 0, MPI_COMM_WORLD); } else if(currentRank == 1) { int recivedNumber; MPI_Recv(&recivedNumber, 1, MPI_INT, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE); printf("Recived number = %d\n", recivedNumber); } MPI_Finalize(); return 0; } Than I should create some name.pbs file... and run it. And I can't understand how to specify this number of processors... I tried like follow: #PBS -l nodes=2:ppn=2 #PBS -N cnt #PBS -j oe mpiexec ~/mpi1 But later on still have no idea what to do with this on putty. qstat comamnd seems to do nothing... only when qstat -Q or q it shows me some 'statistics' but there are 0 values everywhere... it's my first program in mpi and I really don't understand it at all... And when I try to run my program I get: 164900@halite:~$ ./transfer1 Fatal error in MPI_Send: Invalid rank, error stack: MPI_Send(174): MPI_Send(buf=0x7fffd28ec640, count=1, MPI_INT, dest=1, tag=0, MPI_COMM_WORLD) failed MPI_Send(99).: Invalid rank has value 1 but must be nonnegative and less than 1 Can anyone explain me how to run this on the server ? c mpi share|improve this question edited Jan 30 '13 at 3:43 lbonn 1,435923 asked Jan 30 '13 at 3:28 argh 6111 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted the example code works fine here, tested with OpenMPI and GCC, the problem is that when you run the code you need to specific the number of cores via your mpirun instance, you may havecorrectly allocated
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up MPI contigous type example gives fatal error up vote 0 http://stackoverflow.com/questions/14596186/mpi-simple-data-transfer-program down vote favorite I am a beginner in MPI and I am following this link to learn: https://computing.llnl.gov/tutorials/mpi/#Derived_Data_Types. In the end of the section, there is an example. I added the code here. The difference is just two printf functions in line 30 and 33. The problem is the code doesn't work. It gives a Fatal error such that: MPI_Send(173): MPI_Send(buf=0x7fff20072940, count=1, dtype=USER, dest=4, tag=1, MPI_COMM_WORLD) failed MPI_Send(98).: http://stackoverflow.com/questions/22507633/mpi-contigous-type-example-gives-fatal-error Invalid rank has value 4 but must be nonnegative and less than 4 I think it tries to send processor 4, but it does not exist. Why is it doing that? Also, when I remove my printf functions, the program doesn't show anything and I just see the cursor of command line. I compile it with: mpicc mpi_contigous_data.cpp -o contigous_type I run it with: mpirun -np 4 ./contigous_type The code is here: #include "mpi.h" #include #include #define SIZE 4 int main (int argc, char *argv[]) { int numtasks, rank, source=0, dest, tag=1, i; float a[SIZE][SIZE] = {1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0}; float b[SIZE]; MPI_Status stat; MPI_Datatype rowtype; MPI_Init(&argc,&argv); MPI_Comm_rank(MPI_COMM_WORLD, &rank); MPI_Comm_size(MPI_COMM_WORLD, &numtasks); MPI_Type_contiguous(SIZE, MPI_FLOAT, &rowtype); MPI_Type_commit(&rowtype); if (numtasks == SIZE) { if (rank == 0) { for (i=0; ihere for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies http://stackoverflow.com/questions/35669614/mpi-send100-invalid-rank-has-value-1-but-must-be-nonnegative-and-less-than-1 of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign error in up MPI_Send(100): Invalid rank has value 1 but must be nonnegative and less than 1 up vote 1 down vote favorite I am learning MPI in python by myself. I just started from the basic documentation of MPI4py. I started with this code: from mpi4py import MPI comm = MPI.COMM_WORLD rank = comm.Get_rank() if rank == 0: data = {'a': 7, 'b': fatal error in 3.14} comm.send(data, dest=1, tag=11) elif rank == 1: data = comm.recv(source=0, tag=11) When I ran this program, I got following error: Traceback (most recent call last): File "", line 1, in File "MPI/Comm.pyx", line 1175, in mpi4py.MPI.Comm.send (src/mpi4py.MPI.c:106424) File "MPI/msgpickle.pxi", line 211, in mpi4py.MPI.PyMPI_send (src/mpi4py.MPI.c:42120) mpi4py.MPI.Exception: Invalid rank, error stack: MPI_Send(174): MPI_Send(buf=0x10e137554, count=25, MPI_BYTE, dest=1, tag=11, MPI_COMM_WORLD) failed MPI_Send(100): Invalid rank has value 1 but must be nonnegative and less than 1 I didn't find any working solution for this problem. I am using Mac OS X El Capitan. Thanks in Advance! mpi4py share|improve this question asked Feb 27 at 12:12 Rajat Gupta 436314 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote accepted The program complains that 1 is not a valid rank for MPI_Send(): it means that your program is running on a single process. Are you running it by using python main.py ? Try to use mpirun -np 2 python main.py, where 2 is the number of processes. The latter is the usual way to run mpi programs. share|improve this answer answered Feb 28 at 9:19 fra