Uniform memory access

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Uniform Memory Access (UMA) generally stands for a memory architecture in multiprocessor systems . There is only one global memory that can be accessed uniformly by all processors. Ideally, each with the same bandwidth and latency , which is why such a system is also called a symmetrical multiprocessor system (SMP).

The concept is in contrast to NUMA , in which the access time to the memory depends on the location of the memory.

HUMA

Since 2013, AMD has been using the designation hUMA (for heterogeneous Uniform Memory Access ) in relation to the cooperation between CPU and GPU in computation tasks , which can use the same system memory through cache coherence . A simpler programming model and less data copying between separate memory areas should have an advantageous effect.

Demarcation

The shared memory graphics popular in notebooks are referred to as Unified Memory Architecture . However, this involves a memory that has been combined for reasons of space or cost and - in contrast to Uniform Memory Access - not about the shared use of memory contents.

See also

Individual evidence

  1. ↑ Peter Bright. AMD's "heterogeneous Uniform Memory Access" coming this year in Kaveri , Ars Technica, April 30, 2013.