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- Q1068739 subject Q6569662.
- Q1068739 subject Q7163179.
- Q1068739 abstract "A wait state is a delay experienced by a computer processor when accessing external memory or another device that is slow to respond.As of late 2011, computer microprocessors run at very high speeds, while memory technology does not seem to be able to catch up: typical PC processors like the Intel Core 2 and the AMD Athlon 64 X2 run with a clock of several GHz, which means that one clock cycle is less than 1 nanosecond (typically about 0.3 ns to 0.5 ns on modern desktop CPUs), while main memory has a latency of about 15–30 ns. Some second-level CPU caches run slower than the processor core.When the processor needs to access external memory, it starts placing the address of the requested information on the address bus. It then must wait for the answer, that may come back tens if not hundreds of cycles later. Each of the cycles spent waiting is called a wait state.Wait states are a pure waste for a processor's performance. Modern designs try to eliminate or hide them using a variety of techniques: CPU caches, instruction pipelines, instruction prefetch, branch prediction, simultaneous multithreading and others. No single technique is 100% successful, but together they can significantly reduce the problem.".
- Q1068739 wikiPageWikiLink Q128896.
- Q1068739 wikiPageWikiLink Q13566977.
- Q1068739 wikiPageWikiLink Q216334.
- Q1068739 wikiPageWikiLink Q248.
- Q1068739 wikiPageWikiLink Q2490641.
- Q1068739 wikiPageWikiLink Q2928001.
- Q1068739 wikiPageWikiLink Q294890.
- Q1068739 wikiPageWikiLink Q3114593.
- Q1068739 wikiPageWikiLink Q352090.
- Q1068739 wikiPageWikiLink Q39369.
- Q1068739 wikiPageWikiLink Q426882.
- Q1068739 wikiPageWikiLink Q5300.
- Q1068739 wikiPageWikiLink Q6569662.
- Q1068739 wikiPageWikiLink Q66221.
- Q1068739 wikiPageWikiLink Q679552.
- Q1068739 wikiPageWikiLink Q7163179.
- Q1068739 wikiPageWikiLink Q82178.
- Q1068739 wikiPageWikiLink Q838801.
- Q1068739 wikiPageWikiLink Q892036.
- Q1068739 wikiPageWikiLink Q9063099.
- Q1068739 wikiPageWikiLink Q911682.
- Q1068739 comment "A wait state is a delay experienced by a computer processor when accessing external memory or another device that is slow to respond.As of late 2011, computer microprocessors run at very high speeds, while memory technology does not seem to be able to catch up: typical PC processors like the Intel Core 2 and the AMD Athlon 64 X2 run with a clock of several GHz, which means that one clock cycle is less than 1 nanosecond (typically about 0.3 ns to 0.5 ns on modern desktop CPUs), while main memory has a latency of about 15–30 ns. ".
- Q1068739 label "Wait state".