| OPENMP API Specification: Version 5.0 November 2018

2.11.1  Memory Spaces

OpenMP memory spaces represent storage resources where variables can be stored and retrieved. Table 2.8 shows the list of predefined memory spaces. The selection of a given memory space expresses an intent to use storage with certain traits for the allocations. The actual storage resources that each memory space represents are implementation defined.

Table 2.8: Predefined Memory Spaces

Memory space name Storage selection intent

omp_default_mem_space Represents the system default storage.
omp_large_cap_mem_space Represents storage with large capacity.
omp_const_mem_space Represents storage optimized for variables with constant values. The result of writing to this storage is unspecified.
omp_high_bw_mem_space Represents storage with high bandwidth.
omp_low_lat_mem_space Represents storage with low latency.

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Note – For variables allocated in the omp_const_mem_space memory space OpenMP supports initializing constant memory either by means of the firstprivate clause or through initialization with compile time constants for static and constant variables. Implementation-defined mechanisms to provide the constant value of these variables may also be supported.

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