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c++ Programming Glossary: fopenmpWhy openmp program only runs in one thread http://stackoverflow.com/questions/10203902/why-openmp-program-only-runs-in-one-thread num_threads 4 for int i 0 i 100 i test I compiled with g fopenmp . It can correctly print out that I have 4 cpus but all test..
Compilation fails with OpenMP on Mac OS X Lion (memcpy and SSE intrinsics) http://stackoverflow.com/questions/12932107/compilation-fails-with-openmp-on-mac-os-x-lion-memcpy-and-sse-intrinsics Developer SDKs MacOSX10.7.sdk mmacosx version min 10.7 fopenmp Undefined symbols for architecture x86_64 ___builtin_ia32_shufpd.. exit status The code compiles just fine when not using the fopenmp flag to gcc . Now I googled around and found a solution for.. convention . In contrast the code generated without fopenmp is an instruction level expansion of the intrinsic as it is..
Project organization with Cython and C++ http://stackoverflow.com/questions/16792792/project-organization-with-cython-and-c 1.8 include extra_link_args L.. lib extra_compile_args fopenmp O3 extra_link_args And finally the main .pyx that links..
May compiler optimizations be inhibited by multi-threading? http://stackoverflow.com/questions/16807766/may-compiler-optimizations-be-inhibited-by-multi-threading bit here. Before however here's gcc 4.8's documentation on fopenmp fopenmp Enable handling of OpenMP directives #pragma omp in.. Before however here's gcc 4.8's documentation on fopenmp fopenmp Enable handling of OpenMP directives #pragma omp in C C and.. directives #pragma omp in C C and omp in Fortran. When fopenmp is specified the compiler generates parallel code according..
cannot open shared object file: No such file or directory http://stackoverflow.com/questions/2172621/cannot-open-shared-object-file-no-such-file-or-directory and regards tim@user1 release make ... ... g pipe W Wall fopenmp ggdb3 O2 I home tim program_files ICMCluster ann_1.1.1 include..
Does multithreading emphasize memory fragmentation? http://stackoverflow.com/questions/5875989/does-multithreading-emphasize-memory-fragmentation with google perftools gcc openMpMemtest_Linux.cpp fopenmp lgomp lstdc ltcmalloc o ompmemtest time HEAPPROFILE tmp heapprofile..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle @ 3.2 GHz Ubuntu Linux 10 x64 GCC 4.5.2 x64 O2 msse3 fopenmp Threads 1 Seconds 78.3357 FP Ops 960000000000 FLOPs 1.22549e..
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