Poka-yoke is a Japanese term for a process that is translated in English as "mistake proofing." Various poka-yoke tools and techniques establish a better baseline for error-free processes. The concept of poka-yoke involves limiting the number of possible incorrect options, resulting in fewer (or no) user errors.
Enhanced Intel SpeedStep Technology (EIST) is a power and thermal management technology developed by Intel. EIST was introduced as a means of enabling high performance while meeting the power-saving needs of a mobile computer system.
Essentially, EIST throttles the clock speed of a central processing unit (CPU) during periods requiring minimal demand. It then brings the clock speed back up to its maximum potential when demanded by the load . This allows a computer to save power when there is less to process, yet still achieve high performance when the demand is high.
This technology is available in Core branded processors.
The earlier, non-enhanced version of SpeedStep switched frequency and voltage between low and high levels in response to a current processor load. EIST builds on this by using the following strategies:
EIST reduces the latency inherent with changing the voltage-frequency pair (P-state), thus allowing those transitions to occur more frequently. This allows for more granular, demand-based switching and can optimize the power-to-performance balance, based on the demands of the applications.
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