• 2019 Update 4
  • 03/20/2019
  • Public Content

Global Memory Size

OpenCL™ “global” memory is allocated from system (host) memory for the CPU and the Intel® Graphics devices. The amount of available memory depends on the amount of computer system memory and the operating system (32 or 64 bit). For example, a system with 4GB of RAM running on a 32-bit OS usually has less than 3GB available for system memory. This impacts the amount of global memory available for the Intel® Processor Graphics and CPU device. Use the
query to get information on the
available amount of memory. Notice that the maximum size of an individual memory allocation for the device can be queried with
Your code should handle the failures to allocate resources, for example manifested by
Global memory performance depends on the frequency of DDR memory.
Since global memory is shared between the CPU and the Intel® Processor Graphics, it is important to use mapping for memory objects (see the "Mapping Memory Objects" section).
See Also

Product and Performance Information


Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.