I am trying to understand why my OpenACC code runs 17036.0939901 times faster on Nvidia V100 GPU than on AMD Mi-250 GPU. It is a simple matrix-matrix ...
I am trying to compile a C code that uses direct I/O. There is one line that uses the O_DIRECT flag: Intel and GNU understand this just fine and co ...
I need to run an MPI code on a Cray system under aprun. For reasons I won't go into, I am being asked to run it such that no node has more than one pr ...
I am trying to compile a code with crayftn. I get an error message So it wants the flag --no-relax? OK, I can do that. So I re-link with that flag ...
I'm developing on a Cray system that requires '-dynamic' be passed before dynamic libraries can be found. In my case I'm trying to link with libtiff. ...
I am trying to compile a C code under craycc. Compilation fails with the error "relocation truncated to fit: R_X86_64_32". Under Intel or GNU I can ge ...
Am trying to compile a Fortran code with the Cray compiler. I have a standard preprocessing ifdef block in the code: Cray doesn't like this at all. ...
I just created a three line CMakeLists.txt as follows under a test directory with no files under it. I tried export lib path etc and none of the basic ...
Suppose I have a master program, which is basically a 1 rank mpi which uses MPI spawn to spawn 5 worker programs. Now, if I execute my master using ...
I need to use libxml2 in a project that I want to compile on a Cray machine. In principle it is installed, there is a xml2-config program that gives m ...
I am currently compiling code on a HPC system that was set up by Cray. To call Fortran, C, and C++ compilers it is suggested to use ftn, cc, and CC co ...
I'm building NWChem on Cray. libtcmalloc_minimal is already added to an archive file by the cc in my Cray environment. In my configure routine, it exp ...
I am using cray-mpich/7.4.0. When I do It print 4 instead of 8. Why is that? The cluster machine is 64 bit for sure. I have tried this with openm ...
The error message: The module mMatrices (in mod_matrices.f08) calls the function allocator_rank_2_sub which is in a submodule smAllocations (in mod ...
My attempt to compile an OpenACC Fortan code with the Cray Fortran compiler ... fails with the error message So apparently I have to specify the ...
I'm installing the h5py according to the tutorial at http://docs.h5py.org/en/latest/build.html The installation is sucessfull. However, the test faile ...
I have a program, written in fortran90, that is writing an array to a file, but for some reason is using an asterix to represent multiple columns: ...
I am compiling a code that uses Cray LibSci numerical library for BLAS and LAPACK on a Cray XC30 system using the Intel compiler with the "-ipo" flag ...
I want to compile the latest version of VASP 5 (5.4.1) on a Cray XC MPP machine. Does anyone have the settings I can use? The VASP distribution does n ...
I need to compile VASP 5.3.5 on a Cray XC MPP machine. The system has the Gnu, Intel and Cray compiling environments available. There is also a choice ...