SMP: Two Definitions?|
Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.arcetri.astro.it/irlab/library/linux/khg/HyperNews/get/devices/fake/1/1.html
Дата изменения: Thu Mar 23 12:37:25 2000 Дата индексирования: Wed Sep 15 04:09:26 2010 Кодировка: Поисковые слова: mercury surface |
SMP: Two Definitions?
What is SMP?
|
I thought SMP meant "symetric multi-processing," a technology where two or more processors share equal access to memory, device I/O, and interrupts. Ideally one would expect a 100 percent improvement in processing performance for each additional processor, but in reality only 80-90 percent is achieved. However, I have discovered that to some people, SMP means "shared-memory multi-processing." This technology allows multiple processors to run user programs, but one processor reserves interrupt and I/O handling for itself. This is traditionally called "asymetric multi-processing," and I have tentatively concluded that only "marketing types" would use this terminology to confuse potential customers. |