normal MPI compiling: **** Build of configuration Debug for project snd_0.1 ****
make all Building file: ../src/snd_0.1.c Invoking: GCC C Compiler mpicc -I/usr/include/mpi -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"src/snd_0.1.d" -MT"src/snd_0.1.d" -o "src/snd_0.1.o" "../src/snd_0.1.c" ../src/snd_0.1.c:24: warning: return type defaults to 'int' ../src/snd_0.1.c: In function 'main': ../src/snd_0.1.c:45: warning: unused variable 'outfile' ../src/snd_0.1.c:42: warning: unused variable 'FILE_OUT' ../src/snd_0.1.c:41: warning: unused variable 'FILE_NAME' ../src/snd_0.1.c:40: warning: unused variable 'AF_setup' ../src/snd_0.1.c:38: warning: unused variable 'snd_buffor' ../src/snd_0.1.c:37: warning: unused variable 'i' ../src/snd_0.1.c: In function 'print_usage': ../src/snd_0.1.c:29: warning: control reaches end of non-void function Finished building: ../src/snd_0.1.c Building target: snd_0.1 Invoking: GCC C Linker mpicc -o "snd_0.1" ./src/snd_0.1.o -lsndfile -laudiofile Finished building target: snd_0.1 **** Build Finished **** MPI with option --showme: **** Build of configuration Debug for project snd_0.1 **** make all Building file: ../src/snd_0.1.c Invoking: GCC C Compiler mpicc --showme -I/usr/include/mpi -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"src/snd_0.1.d" -MT"src/snd_0.1.d" -o "src/snd_0.1.o" "../src/snd_0.1.c" gcc -I/usr/lib/openmpi/include -I/usr/lib/openmpi/include/openmpi -pthread -I/usr/include/mpi -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MFsrc/snd_0.1.d -MTsrc/snd_0.1.d -o src/snd_0.1.o ../src/snd_0.1.c gcc: ./src/snd_0.1.o: No file or directory make: *** [libsnd_0.1] Error 1 Finished building: ../src/snd_0.1.c Building target: libsnd_0.1 Invoking: GCC C Linker mpicc -shared -o "libsnd_0.1" ./src/snd_0.1.o -lsndfile **** Build Finished **** no MPI -program which was based on **** Build of configuration Debug for project snd_test **** make all Building file: ../main.c Invoking: GCC C Compiler gcc -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.d" -o "main.o" "../main.c" Finished building: ../main.c Building target: snd_test Invoking: GCC C Linker gcc -o "snd_test" ./main.o -lsndfile Finished building target: snd_test **** Build Finished **** 2012/7/30 TERRY DONTJE <terry.don...@oracle.com>: > Please show me how you are compiling the program under gcc and mpicc. Plus > do a "mpicc --showme". > > --td > > > On 7/30/2012 8:33 AM, Paweł Jaromin wrote: > > This situation is also strange for me, I spend 2 days to find a bug :(. > > Unfortunately I am not a professional C/C++ programmer, but I have > to make this program. Please have a look in a picture from link below, > maybe it will be more clear. > > http://vipjg.nazwa.pl/sndfile_error.png > > > > > > > > > > 2012/7/30 TERRY DONTJE <terry.don...@oracle.com>: > > On 7/30/2012 6:11 AM, Paweł Jaromin wrote: > > Hello > > Thanks for fast answer, but the problem looks a little different. > > Of course, I use this code only for master node (rank 0), because only > this node has an access to file. > > As You can see i use "if" clause to check sndFile for NULL: > > if (sndFile == NULL) > > and it returns not NULL value, so the code can run forward. > I have found the problem during check array: > > > long numFrames = sf_readf_float(sndFile, snd_buffor, > sfinfo.frames); > > // Check correct number of samples loaded > if (numFrames != sfinfo.frames) { > fprintf(stderr, "Did not read enough frames for > source\n"); > sf_close(sndFile); > free(snd_buffor); > MPI_Finalize(); > return 1; > } > > So, after that I went to debuger to check variables (I use Eclipse PTP > and sdm enviroment), then after inicjalization variable "sndFile" has > "no value" not "NULL" . Unfortunatelly sndFile has still the same > value to the end of program :(. > > What do you mean by sndFile has "no value"? There isn't a special "no > value" value to a variable unless you are debugging a code that somehow had > some variable optimized out at the particular line you are interested in. > > Declarations: > FILE *outfile = NULL ; > SF_INFO sfinfo ; > SNDFILE *sndFile= NULL; > > Very interesting is , that "sfinfo" from the same library works perfect. > At the end of this story, I modified the program without MPI , then > compiled it by gcc (not mpicc) and it works fine (in debuger sndFile > has proper value). > > So it seems you believe mpicc is doing something wrong when all mpicc is is > a wrapper to a compiler. Maybe doing a "mpicc --showme" will give you an > idea what compiler and options mpicc is passing to the compiler. This > should give you an idea the difference between your gcc and mpicc > compilation. I would suspect either mpicc is using a compiler significantly > different than gcc or that mpicc might be passing some optimization > parameter that is messing the code execution (just a guess). > > > I hope, now is clear. > > Not really. > > --td > > > > 2012/7/30 TERRY DONTJE <terry.don...@oracle.com>: > > I am not sure I am understanding the problem correctly so let me describe it > back to you with a couple clarifications. > > So your program using sf_open compiles successfully when using gcc and > mpicc. However, when you run the executable compiled using mpicc sndFile is > null? > > If the above is right can you tell us how you ran the code? > Will the code run ok if ran with "mpirun -np 1" on the same machine you run > the gcc code normally? > When the mpicc compiled code sf_open call returns NULL what does the > successive sf_strerror report? > My wild guess is when you run the mpicc compiled code one of the processes > is on a node that doesn't have access to the file passed to sf_open. > > --td > > On 7/28/2012 1:08 PM, Paweł Jaromin wrote: > > Hello all > > Because I try make a program to parallel procesing sound files, I use > libsndfile library to load and write wav files. Sytuation is strange, > because when I compile the program by gcc is good (no parallel), but > if I do it by mpicc is a problem with sndFile variable. > > // Open sound file > SF_INFO sndInfo; > SNDFILE *sndFile = sf_open(argv[1], SFM_READ, &sndInfo); > if (sndFile == NULL) { > fprintf(stderr, "Error reading source file '%s': %s\n", argv[1], > sf_strerror(sndFile)); > return 1; > } > > This code run witout an error, but variable is "No value" > > Maybe somone can help me ?? > > > -- > Terry D. Dontje | Principal Software Engineer > Developer Tools Engineering | +1.781.442.2631 > Oracle - Performance Technologies > 95 Network Drive, Burlington, MA 01803 > Email terry.don...@oracle.com > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > -- > Terry D. Dontje | Principal Software Engineer > Developer Tools Engineering | +1.781.442.2631 > Oracle - Performance Technologies > 95 Network Drive, Burlington, MA 01803 > Email terry.don...@oracle.com > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > -- > Terry D. Dontje | Principal Software Engineer > Developer Tools Engineering | +1.781.442.2631 > Oracle - Performance Technologies > 95 Network Drive, Burlington, MA 01803 > Email terry.don...@oracle.com > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- ------------------ pozdrawiam Paweł Jaromin
