最新 Intel i7 优化手册.pdf

发布时间：2022-06-09 发布人：admin 分类：说明书资料大小：4.90M 资料格式：pdf 举报版权申诉

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For Description of these Features… see… http://download.intel.com/products/processor/corei7/prod_brief.pdf The following Features Greatly affect Performance Monitoring… • • • The New Performance Monitoring Unit (New Counters, New Meanings) Intel® Wide Dynamic Execution (this includes the OOO capabilities of the processor) – Adds complexity for performance analysis Intel® Hyper-Threading Technology – Adds complexity for performance analysis– if you can it is easier to turn it off during performance analysis • Intel® Turbo Boost Technology – Adds complexity for performance analysis– if you can it is easier to turn it off during performance analysis • The Features of the Integrated Memory Controller/Smart Memory Access/QPI/8 MB Intel Smart Cache – Adds More things which can be/need to be measured on Nehalem 6

The 3 Fixed Counters = INST_RETIRED.ANY CPU_CLK_UNHALTED.THREAD CPU_CLK_UNHALTED.REF Note- each of these counters has a corresponding Programmable version (which will use a general purpose counter) INST_RETIRED.ANY_P CPU_CLK_UNHALTED.THREAD_P CPU_CLK_UNHALTED.REF_P Note: The New capabilities to measure uncore events is not supported by Vtune. And the new information gathered when measuring certain events (i.e. – Load Latency in the PEBS record) is not supported by VTune™ analyzer. 7

Both Intel® Hyper-Threading Technology and Intel® Turbo Boost Technology can be enabled or disabled through BIOS on most platforms. Contact with the system vendor or manufacturer for the specifics of any platform before attempting this. Incorrectly modifying bios settings from those supplied by the manufacturer can result in rendering the system completely unusable and may void the warranty. Don’t forget to re-enable these features once you are through with the software optimization process! 8

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