Search found 24 matches

by prakrati
Wed Feb 23, 2011 3:33 am
Forum: ROMS Discussion
Topic: Why Intel mpi is very slow as compared to others
Replies: 0
Views: 1050

Why Intel mpi is very slow as compared to others

Dear Sir/Madam

I ran ROMS for 64 to 1024 ranks with intel mpi and got very poor results.Then I ran ROMS with open mpi and got good results.I am very confused as to why intel mpi is so slow as compared to open mpi.Please help

Thanks and Regards
Prakrati
by prakrati
Tue Feb 22, 2011 3:25 am
Forum: ROMS Discussion
Topic: ROMS Error: Abnormal Termination NETCDF OUTPUT
Replies: 3
Views: 3137

Re: ROMS Error: Abnormal Termination NETCDF OUTPUT

Yes I do have a directory called output
by prakrati
Mon Feb 21, 2011 7:40 am
Forum: ROMS Discussion
Topic: ROMS Error: Abnormal Termination NETCDF OUTPUT
Replies: 3
Views: 3137

ROMS Error: Abnormal Termination NETCDF OUTPUT

Dear Sir/Madam This is to request that when I am running ROMS with intel mpi for 256 ranks it gives me Abnormal Termination NETCDF OUTPUT. I am using NETCDF 4 with HDF5. The output is as follows: Prologue finished, program starts: Process Information: Benchmark Test, Idealized Southern Ocean, Large ...
by prakrati
Fri Nov 19, 2010 11:15 am
Forum: ROMS Problems
Topic: ROMS not running for 1 rank per node for 64 ranks for 17532
Replies: 1
Views: 1265

ROMS not running for 1 rank per node for 64 ranks for 17532

I ran ROMS 1 rank per node for 64 ranks for 17532 iterations and it is failing.It ran for 100 iterations. The following is the error file : oceanM: posixio.c:248: px_pgin: Assertion `*posp == ((off_t)(-1)) || *posp == lseek(nciop->fd, 0, 1)' failed. forrtl: error (76): Abort trap signal Image PC Rou...
by prakrati
Thu Nov 18, 2010 4:21 am
Forum: ROMS Problems
Topic: Why is my ouput directory always empty at the end of the run
Replies: 4
Views: 1732

Re: Why is my ouput directory always empty at the end of the run

Yes I am running BENCHMARK and please can you be a bit more explicit as to what I have to do exactly
Thanks!!!
by prakrati
Thu Nov 18, 2010 4:09 am
Forum: ROMS Problems
Topic: ROMS not running with mvapich
Replies: 4
Views: 2047

Re: ROMS not running with mvapich

I did mention ocean_benchmark4.in quite correctly int the script and its running for all sizes except for 1024
by prakrati
Tue Nov 16, 2010 6:42 am
Forum: ROMS Problems
Topic: Why is my ouput directory always empty at the end of the run
Replies: 4
Views: 1732

Why is my ouput directory always empty at the end of the run

Hey

When I run ROMS in the end when it has run successfully my outpot directory is empty.Is it normal??
Please clarify.

Thanks and Regards
Prakrati
by prakrati
Tue Nov 16, 2010 3:41 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

Re: ROMS not running on 1024 cores for 17532 iterations

I was using intel mpi earlier.I dont know why it wasnt working with it .I couldnt find any tunable parameter for buffer size for intel mpi.
by prakrati
Tue Nov 16, 2010 3:31 am
Forum: ROMS Problems
Topic: ROMS not running with mvapich
Replies: 4
Views: 2047

Re: ROMS not running with mvapich

The following is the error that I am getting when running ROMS on 64 cores for 100 iterations using mvapich Resource usage summary: CPU time : 1.44 sec. Max Memory : 5 MB Max Swap : 36 MB The output (if any) follows: Process Information: Node # 19 (pid= 8769) is active. Node # 27 (pid= 8819) is acti...
by prakrati
Mon Nov 15, 2010 12:06 pm
Forum: ROMS Problems
Topic: Why cant openmp and MPI be used simultaneously??
Replies: 2
Views: 1366

Why cant openmp and MPI be used simultaneously??

Please can you tell me why openmp and MPI can't be used simulataneously?
by prakrati
Mon Nov 15, 2010 12:01 pm
Forum: ROMS Problems
Topic: ROMS not running with mvapich
Replies: 4
Views: 2047

ROMS not running with mvapich

I tried to run ROMS with mvapich on 64 cores for 100 iterations but it is failing with SIGSEGV 11 fault
Please can you guide what should I do?
by prakrati
Mon Nov 15, 2010 11:58 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

Re: ROMS not running on 1024 cores for 17532 iterations

Thanks It ran with open mpi!!!! :)
by prakrati
Sat Nov 13, 2010 10:47 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

Re: ROMS not running on 1024 cores for 17532 iterations

hey

I ran by setting the MPIEXEC_TIMEOUT=3600 and NHIS > 17532 but still the same error is coming.Will try to change the buffer size and let you know what happens.Till then please think of what can I do to make it work as it is very crucial.

Thanks a lot !!!!
by prakrati
Sat Nov 13, 2010 8:11 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

Re: ROMS not running on 1024 cores for 17532 iterations

Thanks for your quick response.Will try what you told and then let you know what happens
Thanks again!
by prakrati
Sat Nov 13, 2010 7:16 am
Forum: ROMS Problems
Topic: Doubt whether ROMs is running successfully or not
Replies: 1
Views: 1185

Doubt whether ROMs is running successfully or not

Hello I ran ROMS on 512 ranks. In the output file no error message is displayed. But in the end of the output file total time is displayed as asterisks. On the other hand after displaying time taken by individual rank total time is displayed. Here I am pasting appropriate parts of output file. Can y...
by prakrati
Sat Nov 13, 2010 5:57 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

Re: ROMS not running on 1024 cores for 17532 iterations

I did as you told and included mkdir output in the batch script so now its giving me the following error with 1024 ranks for 17532 iterations.Please help Initial basin volumes: TotVolume = 1.65993987026488E+17 m3 MinVolume = 1.97754634567622E+08 m3 MaxVolume = 1.80931355725002E+10 m3 Max/Min = 9.149...
by prakrati
Sat Nov 13, 2010 4:47 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

Re: ROMS not running on 1024 cores for 17532 iterations

Thanks for your quick response
I already created output directory and it is running for lesser iterations for the same ranks .So I feel the problem is not with the output file.Please guide
by prakrati
Sat Nov 13, 2010 3:40 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

Re: ROMS not running on 1024 cores for 17532 iterations

Yes it is working fine with less processor cores.I am using netCDF 3.6.2 so I guess it doesnt support parallel output.So what should I do to make it run successfully. Please help
by prakrati
Fri Nov 12, 2010 11:41 am
Forum: ROMS Problems
Topic: ROMS not running on 1024 cores for 17532 iterations
Replies: 12
Views: 5343

ROMS not running on 1024 cores for 17532 iterations

Hello I ran ocean_benchmark4.in on 1024 cores for 17532 iterations but its giving NetCDF output error Kindly help Resource usage summary: CPU time : 1.56 sec. Max Memory : 5 MB Max Swap : 36 MB The output (if any) follows: Process Information: Model Input Parameters: ROMS/TOMS version 3.2 Friday - N...
by prakrati
Tue Nov 02, 2010 11:15 am
Forum: ROMS Discussion
Topic: Abnormal Termination of ROMS run
Replies: 7
Views: 2150

Re: Abnormal Termination of ROMS run

Also the NetCDF library has been compiled with the same compilers as the ROMS
Please help
by prakrati
Tue Nov 02, 2010 7:59 am
Forum: ROMS Discussion
Topic: Abnormal Termination of ROMS run
Replies: 7
Views: 2150

Re: Abnormal Termination of ROMS run

Please can you help and tell me where this output file should be? I created the output file in the same directory which contains my executable but it still gave the same error .
by prakrati
Tue Nov 02, 2010 4:06 am
Forum: ROMS Discussion
Topic: Abnormal Termination of ROMS run
Replies: 7
Views: 2150

Re: Abnormal Termination of ROMS run

Benchmark Test, Idealized Southern Ocean, Large Grid Operating system : Linux CPU/hardware : x86_64 Compiler system : ifort Compiler command : /app/intel/impi/3.1/bin64/mpiifort Compiler flags : -heap-arrays -g -ftrapuv -traceback -free Input Script : /homenc/ipaes84/FinalROMS/ROMS/ROMS/roms-3.1/RO...
by prakrati
Tue Nov 02, 2010 3:19 am
Forum: ROMS Discussion
Topic: Abnormal Termination of ROMS run
Replies: 7
Views: 2150

Abnormal Termination of ROMS run

Hey Folks I am running ROMS with the input file ocean_benchmark4.in with NtileI = 2 and NtileJ = 4 and number of processes = 8 on 1 node.It is giving the following error in the output file : ERROR: Abnormal termination: NetCDF OUTPUT. REASON: No such file or directory Please help asap Thanks Prakrati