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Dear all, I got some compile warnings and offload errors when I offloaded part of my C++ code to Intel Phi for acceleration. I hope I could get some help here.
I first read some tiff images using libtiff and make some first-step calculations to the images on the host. Then I want to make some further calculations to the first-step results on Phi using MKL. The code offloaded to Phi only uses the standard C++ and MKL libraries. When I compile the code, there are some warnings associated with the stdlib.h file. When I run the code, I got some undefined symbol errors about the libtiff library. The offloaded code has nothing to do with libtiff. I attached my makefile, the compile warnings and runtime errors. Thanks for the help.
The makefile:
CC = icpc LDIR = -L$(MKLROOT)/lib/intel64 IDIR = -I$(MKLROOT)/include LLIB = -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread -lpthread -lm -liomp5 -ltiff FLAG = -no-multibyte-chars -openmp DEF = -DDEBUG_MAIN -DWRITE_TO_FILE -DMKL_ILP64 MIC = -offload-option,mic,compiler,"-I/usr/include -L$(MKLROOT)/lib/mic -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread" -offload-attribute-target=mic -watch=mic-cmd main: main.cpp dpc.cpp dpc.h $(CC) main.cpp dpc.cpp $(LLIB) -o main $(MIC) $(IDIR) $(LDIR) $(DEF) $(FLAG) clean: rm -rf *o main
The compile warnings:
rm -rf *o main icpc main.cpp dpc.cpp -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread -lpthread -lm -liomp5 -ltiff -o main -offload-option,mic,compiler,"-I/usr/include -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/mic -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread" -offload-attribute-target=mic -watch=mic-cmd -I/software/intel/2013/composer_xe_2013_sp1/mkl/include -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/intel64 -DDEBUG_MAIN -DWRITE_TO_FILE -DMKL_ILP64 -no-multibyte-chars -openmp MIC command line: icpc -I/usr/include -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/mic -I/software/intel/2013/composer_xe_2013_sp1/mkl/include main.cpp dpc.cpp -o main -offload-attribute-target=mic -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/intel64 -DDEBUG_MAIN -DWRITE_TO_FILE -DMKL_ILP64 -no-multibyte-chars -openmp -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread In file included from /usr/include/stdlib.h(43), from /software/intel/2013/composer_xe_2013_sp1.1.106/compiler/include/omp.h(142), from main.cpp(17): /usr/include/bits/waitstatus.h(75): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_retcode:8; /* Return code if exited normally. */ ^ In file included from /usr/include/stdlib.h(43), from /software/intel/2013/composer_xe_2013_sp1.1.106/compiler/include/omp.h(142), from main.cpp(17): /usr/include/bits/waitstatus.h(89): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_stopsig:8; /* Stopping signal. */ ^ In file included from /usr/include/stdlib.h(43), from /software/intel/2013/composer_xe_2013_sp1.1.106/compiler/include/omp.h(142), from main.cpp(17): /usr/include/bits/waitstatus.h(84): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned } __wait_terminated; ^ In file included from /usr/include/stdlib.h(43), from dpc.h(6), from dpc.cpp(2): /usr/include/bits/waitstatus.h(75): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_retcode:8; /* Return code if exited normally. */ ^ In file included from /usr/include/stdlib.h(43), from dpc.h(6), from dpc.cpp(2): /usr/include/bits/waitstatus.h(89): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_stopsig:8; /* Stopping signal. */ ^ In file included from /usr/include/stdlib.h(43), from dpc.h(6), from dpc.cpp(2): /usr/include/bits/waitstatus.h(84): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned } __wait_terminated; ^
The runtime error:
The time for loading images and calculating xsum and ysum: 3.87822 On the sink, dlopen() returned NULL. The result of dlerror() is "/tmp/coi_procs/1/160843/load_lib/icpcoutVJ7iyF: undefined symbol: TIFFGetField" On the remote process, dlopen() failed. The error message sent back from the sink is /tmp/coi_procs/1/160843/load_lib/icpcoutVJ7iyF: undefined symbol: TIFFGetField offload error: cannot load library to the device 0 (error code 20)
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Cheng C. wrote:
Dear all, I got some compile warnings and offload errors when I offloaded part of my C++ code to Intel Phi for acceleration. I hope I could get some help here.
I first read some tiff images using libtiff and make some first-step calculations to the images on the host. Then I want to make some further calculations to the first-step results on Phi using MKL. The code offloaded to Phi only uses the standard C++ and MKL libraries. When I compile the code, there are some warnings associated with the stdlib.h file. When I run the code, I got some undefined symbol errors about the libtiff library. The offloaded code has nothing to do with libtiff. I attached my makefile, the compile warnings and runtime errors. Thanks for the help.
The makefile:
CC = icpc LDIR = -L$(MKLROOT)/lib/intel64 IDIR = -I$(MKLROOT)/include LLIB = -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread -lpthread -lm -liomp5 -ltiff FLAG = -no-multibyte-chars -openmp DEF = -DDEBUG_MAIN -DWRITE_TO_FILE -DMKL_ILP64 MIC = -offload-option,mic,compiler,"-I/usr/include -L$(MKLROOT)/lib/mic -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread" -offload-attribute-target=mic -watch=mic-cmd main: main.cpp dpc.cpp dpc.h $(CC) main.cpp dpc.cpp $(LLIB) -o main $(MIC) $(IDIR) $(LDIR) $(DEF) $(FLAG) clean: rm -rf *o mainThe compile warnings:
rm -rf *o main icpc main.cpp dpc.cpp -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread -lpthread -lm -liomp5 -ltiff -o main -offload-option,mic,compiler,"-I/usr/include -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/mic -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread" -offload-attribute-target=mic -watch=mic-cmd -I/software/intel/2013/composer_xe_2013_sp1/mkl/include -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/intel64 -DDEBUG_MAIN -DWRITE_TO_FILE -DMKL_ILP64 -no-multibyte-chars -openmp MIC command line: icpc -I/usr/include -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/mic -I/software/intel/2013/composer_xe_2013_sp1/mkl/include main.cpp dpc.cpp -o main -offload-attribute-target=mic -L/software/intel/2013/composer_xe_2013_sp1/mkl/lib/intel64 -DDEBUG_MAIN -DWRITE_TO_FILE -DMKL_ILP64 -no-multibyte-chars -openmp -lmkl_intel_ilp64 -lmkl_core -lmkl_intel_thread In file included from /usr/include/stdlib.h(43), from /software/intel/2013/composer_xe_2013_sp1.1.106/compiler/include/omp.h(142), from main.cpp(17): /usr/include/bits/waitstatus.h(75): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_retcode:8; /* Return code if exited normally. */ ^ In file included from /usr/include/stdlib.h(43), from /software/intel/2013/composer_xe_2013_sp1.1.106/compiler/include/omp.h(142), from main.cpp(17): /usr/include/bits/waitstatus.h(89): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_stopsig:8; /* Stopping signal. */ ^ In file included from /usr/include/stdlib.h(43), from /software/intel/2013/composer_xe_2013_sp1.1.106/compiler/include/omp.h(142), from main.cpp(17): /usr/include/bits/waitstatus.h(84): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned } __wait_terminated; ^ In file included from /usr/include/stdlib.h(43), from dpc.h(6), from dpc.cpp(2): /usr/include/bits/waitstatus.h(75): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_retcode:8; /* Return code if exited normally. */ ^ In file included from /usr/include/stdlib.h(43), from dpc.h(6), from dpc.cpp(2): /usr/include/bits/waitstatus.h(89): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned unsigned int __w_stopsig:8; /* Stopping signal. */ ^ In file included from /usr/include/stdlib.h(43), from dpc.h(6), from dpc.cpp(2): /usr/include/bits/waitstatus.h(84): warning #3218: *MIC* class/struct may fail when offloaded because this field is misaligned or contains data that is misaligned } __wait_terminated; ^The runtime error:
The time for loading images and calculating xsum and ysum: 3.87822 On the sink, dlopen() returned NULL. The result of dlerror() is "/tmp/coi_procs/1/160843/load_lib/icpcoutVJ7iyF: undefined symbol: TIFFGetField" On the remote process, dlopen() failed. The error message sent back from the sink is /tmp/coi_procs/1/160843/load_lib/icpcoutVJ7iyF: undefined symbol: TIFFGetField offload error: cannot load library to the device 0 (error code 20)
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I believe this is a duplicate of another forum issue submitted by you: https://software.intel.com/en-
If it isn't, please let us know.
Regards
--
Taylor
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Taylor Kidd (Intel) wrote:
I believe this is a duplicate of another forum issue submitted by you: https://software.intel.com/en-us/forums/topic/515752
If it isn't, please let us know.
Regards
--
Taylor
Yes, it is. I don't know how to delete the duplicated topic.
Thanks,
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