tailieunhanh - Sách: Adaptive Techniques for Dynamic Processor Optimization Theory and Practice by Alice Wang and Samuel Naffziger_17

Cuốn sách này là về các kỹ thuật khác nhau, thích ứng và năng động, được sử dụng để tối ưu hóa sức mạnh xử lý và hiệu suất. Nó dựa trên một diễn đàn rất thành công tại ISSCC tập trung vào các kỹ thuật thích ứng. Cuốn sách này xem xét quá trình công nghệ cơ bản cho các thiết kế thích ứng và sau đó kiểm tra mạch khác nhau, kiến trúc và phần mềm có địa chỉ các khía cạnh khác nhau. Các chương được viết bởi những người trong giới học viện và ngành công. | Chapter 12 The Challenges of Testing Adaptive Designs 297 The Itanium 2 has a thermal management system very similar to power measurement. Using the same VCO Figure as in the power measurement system the thermal solution has the resolution to measure temperature with a precision 1 C. Figure Block diagram of thermal measurement. IEEE 2006 However in order to calibrate the system a known temperature with 1 C of error needs to be supplied by the test environment. The test environment has to test parts with varying power draw in a short amount of time and with limited thermal probes. To achieve the desired thermal control in a test environment the part would need to be submerged in an oil bath. This is not possible while achieving the required test throughput. As a result the accuracy of the thermal monitoring system is not limited by the processor capabilities but instead is limited by the capabilities of the test environment. As more and more adaptive techniques are used to stretch the capabilities of silicon investments will need to be made in validation and test systems to fully utilize the new capabilities. Adaptive circuit techniques have the ability to reduce processor guard-bands provided the test infrastructure can emulate the use conditions adequately. Guard-Band Concerns of Adaptive Power Management After one considers the correctness of adaptable systems one must deliver the value that they offer in the product environment. One of the primary 298 Eric Fetzer Jason Stinson Brian Cherkauer Steve Poehlman manufacturing considerations in designing an adaptive frequency power control system is performance variability tolerance. A system based on any type of analog measurement will inherently be susceptible to part-to-part variation as well as environmental variation. For example the Montecito system that makes an on-die analog measurement of the power being consumed will be subject to part-to-part variation no two parts will have exactly the .