Operation
The scheduler in a Pentium 4 processor is so aggressive that it will send operations for execution without a guarantee that they can be successfully executed. (Among other things, the scheduler assumes all data is in level 1 CPU cache.) The most common reason execution fails is that the requisite data is not available, which itself is most likely due to a cache miss. When this happens, the replay system springs into action. The replay system signals the scheduler to stop, and then repeatedly executes the failed string of dependent operations until they have completed successfully.
Read more about this topic: Replay System
Famous quotes containing the word operation:
“It is critical vision alone which can mitigate the unimpeded operation of the automatic.”
—Marshall McLuhan (1911–1980)