![]() ![]() func2 is executed for the remaining threads.func1 is executed for the remaining threads.func2 is executed for the first 512 threads.func1 is executed for the first 512 threads.Then the kernel must run twice and the order of execution will be: If you execute the following with 600 threads: func1() warpsize is 32 (which means each of the 14x8=112 thread-processors can schedule up to 32 threads)Ī block cannot have more active threads than 512 therefore _syncthreads can only synchronize limited number of threads.each SM has 8 thread-processors (AKA stream-processors, SP or cores).Uint j = (blockIdx.y * blockDim.y) + threadIdx.y In the kernel the pixel (i,j) to be processed by a thread is calculated this way: uint i = (blockIdx.x * blockDim.x) + threadIdx.x The threads of a block can be indentified (indexed) using 1Dimension(x), 2Dimensions (x,y) or 3Dim indexes (x,y,z) but in any case x yz >( /* params for the kernel function */ ) įinally: there will be something like "a queue of 4096 blocks", where a block is waiting to be assigned one of the multiprocessors of the GPU to get its 64 threads executed. A block is executed by a multiprocessing unit. #error "Do not include KokkosCore_config.h directly include Kokkos_Macros.hpp instead.If a GPU device has, for example, 4 multiprocessing units, and they can run 768 threads each: then at a given moment no more than 4*768 threads will be really running in parallel (if you planned more threads, they will be waiting their turn). #if !defined(KOKKOS_MACROS_HPP) || defined(KOKKOS_CORE_CONFIG_H) The section about CUDA settings is empty. ![]() home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/impl/Kokkos_Utilities.hpp:59:1: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ /home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/impl/Kokkos_Utilities.hpp:65:1: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ /home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/impl/Kokkos_Utilities.hpp:73:1: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ /home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/impl/Kokkos_Utilities.hpp:80:1: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ /home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/Kokkos_UniqueToken.hpp:74:3: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ /home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/Kokkos_UniqueToken.hpp:78:3: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ /home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/Kokkos_UniqueToken.hpp:82:3: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ /home/pgambron/opt/include/Kokkos_Macros.hpp:182:40: error: ‘_device_’ does not name a type did you mean ‘_dev_t’? #define KOKKOS_INLINE_FUNCTION _device_ _host_ inline ^ /home/pgambron/opt/include/Kokkos_Core_fwd.hpp:68:3: note: in expansion of macro ‘KOKKOS_INLINE_FUNCTION’ KOKKOS_INLINE_FUNCTION ^~~~~~~~~~~~~~~~~~~~~~ ![]() When I try to compile my code, I obtain errors like: I enabled CUDA by setting the following variables:ĬMAKE_CXX_COMPILER /home/pgambron/kokkos/bin/nvcc_wrapper KOKKOS_ENABLE_CUDA ON KOKKOS_ENABLE_CUDA_INTERNAL ON NVCC_WRAPPER /home/pgambron/kokkos/bin/nvcc_wrapper If I complie kokkos without CUDA support, everything works fine.īut, if I enable CUDA support, I am able to compile kokkos but I can't compile my code anymore. It's the reason why I had remained vague. ![]()
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