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Uniform memory access
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<h2 id="types-of-architectures">Types of architectures</h2> <p>There are three types of UMA architectures: </p> <ul><li>UMA using bus-based <a href="/facts/Symmetric_multiprocessing/T9CahUsN">symmetric multiprocessing</a> (SMP) architectures;</li> <li>UMA using <a href="/facts/Crossbar_switch/fSDXkMzf">crossbar switches</a>;</li> <li>UMA using <a href="/facts/Multistage_interconnection_networks/NtzdbFwM">multistage interconnection networks</a>.</li></ul> <h2 id="huma">hUMA</h2> <p>In April 2013, the term hUMA (<i>heterogeneous uniform memory access</i>) began to appear in <a href="/facts/AMD/CB1G7QTb">AMD</a> promotional material to refer to <a href="/facts/CPU/Jxp1bqMV">CPU</a> and <a href="/facts/GPU/PTK1RQVp">GPU</a> sharing the same system memory via <a href="/facts/Cache_coherence/MhUD576q">cache coherent</a> views. Advantages include an easier programming model and less copying of data between separate memory pools.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Non-uniform_memory_access/MpmN5mN0">Non-uniform memory access</a></li> <li><a href="/facts/Cache-only_memory_architecture/qQea99Gn">Cache-only memory architecture</a></li> <li><a href="/facts/Heterogeneous_System_Architecture/uwayMPnT">Heterogeneous System Architecture</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Kai Hwang. Advanced Computer Architecture. ISBN 0-07-113342-9. <a href="0-07-113342-9" target="_blank">0-07-113342-9</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Peter Bright (April 30, 2013). "AMD's "heterogeneous Uniform Memory Access" coming this year in Kaveri". Ars Technica. <a href="https://arstechnica.com/information-technology/2013/04/amds-heterogeneous-uniform-memory-access-coming-this-year-in-kaveri/" target="_blank">https://arstechnica.com/information-technology/2013/04/amds-heterogeneous-uniform-memory-access-coming-this-year-in-kaveri/</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>