Evaluate instructions-retired data in conjunction with performance data to examine the correctness of threading methodology. The Instructions Retired processor event in the VTune™ Performance Analyzer is a key performance indicator. Instructions Retired can give you quick insight into possible performance problems in your application.
My plan to go parallel this time was thwarted by concerns that I may still have left some serial performance on the table. So I’ll take one more look (OK, well, no more than three). Leading the contenders was Jim Dempsey’s suggestion that accumulating forces instead of accelerations would save some divides. His numbers did not show a dramatic difference but did suggest summing forces to be ever so slightly faster than accumulating accelerations.
You may have heard that most current processors, including the Intel® Core™ i7 and Xeon® 5500 series, support prefetching. This blog will briefly cover the basics of what that means and how it affects your performance analysis.
What is Prefetching?
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