PowerPoint Presentation

Size: px

Start display at page:

Download "PowerPoint Presentation"

妓牛
6 years ago
Views:

1 在基于英特尔架构的平台上针对联网待机优化 Windows* 8 应用程序 Chao Huang, Application Software Engineer, Intel Manuj Sabharwal, Sr. Software Engineer, Intel SFTS008

2 议程联网待机概述软件对联网待机平台的影响调试联网待机的工具实例分析分析系统来满足联网待机的要求总结下一步本课程演示文稿 (PDF) 发布在技术课程目录网站 : intel.com/go/idfsessionsbj 该网址同时打印于会议指南中专题讲座日程页的上方 2

3 3 联网待机概述

4 联网待机概述特性描述 : 在有网络的情况下, 应用程序可以一直保持更新, 使得内容总是最新 Windows * 标志要求 - 支持联网待机的系统必须在 16 小时空闲状态下测试后只使用小于 5% 系统电量联网待机电池续航持续多日联网待机反应速度一直开机总是最新更新内容 4 联网待机相关资源 :

5 联网待机下软件的行为桌面活动管理器 (DAM) 可以让大多数 Windows * 应用程序在联网待机下挂起好的行为在联网待机时, 应用程序服务发生在系统进程活动时间内, 同时只做必要的活动不好的行为应用程序的活动和系统进程的活动无关或者比系统进程晚进入休眠例如 : 应用程序在联网待机时频繁对存储设备进行读写 5

6 6 软件对联网待机平台的影响

7 应用程序的功耗分析测试系统 Intel 移动参考平台 Windows * 8 x64 无线网络连接 ( 功耗 ) NiDAQ ( 国家仪器 ) 被测试程序 8 个极流行的应用程序内容创建人机交互杀毒软件 7

8 应用程序对联网待机平台的影响联网待机下应用程序对平台的影响相对于基准的功耗 (mw) 最好的情况活动指数 (%) Application-1 Application-2 Application-3 Application-4 Application-5 Application-6 Application-7 Application-8 0 Power Overbaseline(mW) Activity Factor (%) 即使是一小点的功耗增加都可能通过不了 Windows* 标志的认证, 同时会影响电池续航 8 The Power comparisons shown is based on the Intel Mobile Processor using NiDAQ * instrument. Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance/power

9 9 调试联网待机的工具

10 Windows* Hardware Certification Toolkit (HCK) Windows * HCK 包含各种确定硬件是否符合联网待机条件的工具和文档 Windows HCK 可以自动收集调试信息日志, 同时确认是否符合授予 Windows 8 联网待机标志的要求 Windows Performance Analyzer 一系列的用于分析 Windows 应用程序性能和功耗的性能监测工具使用命令行处理 Windows 下的事件日志 (ETW), 同时提供脚本用于总结测试时系统唤醒, 存储活动情况等预处理测试日志, 使其在用户界面分析时更容易分析应用程序频繁唤醒等问题 10

11 Windows* HCK 用户界面对指定程序进行测试测试结果 / 小结在一些手动设置下进行 4 小时的测试 11 Windows HCK 提供了一系统关于认证 Windows 标志的测试

12 Windows* Performance Analyzer 用户界面 Windows Performance Analyzer 提供了关于应用程序的诸多细节 12

13 13 实例分析 : 分析系统来满足联网待机的要求

14 收集日志启用 debug 模式来收集日志 14

15 分析日志第一步 : 使用以下命令来获取调试日志 ( 如 : filename.etl) xperf -symbols -i filename.etl -o out_energy.csv -a energydiag -verbose -range t1 t2 -buckets 100us 1ms 10ms 15ms 16ms 30ms 50ms 100ms 500ms 1s 5s 29s 30s 2>NULL xperf -symbols -i filename.etl -o out_power.csv -a power -range t1 t2 xperf -symbols -i filename.etl -o out_diskidlehistogram.csv -a diskidlehistogram -range t1 t2-buckets 3s 90s 300s 1500s xperf -i filename.etl -a cpudisk -o disk_cpu_out.csv 第二步 : 打开 out_energy.csv 文件来查找系统在联网待机下的系统活动因素比较于基准和测试系统中的 Total Busy Percent 一栏的数值 ( 如 : 安装软件前 vs. 安装软件后 ) 15 Histogram of Busy Enter/Exit Time - Group "All CPUs" 100us - 1ms 1ms - 10ms 10ms - 15ms 15ms - 16ms 16ms - 30ms 30ms - 50ms 50ms - 100ms 100ms - 500ms - 500ms 1s Header < 100us Busy Bucket Time (us) % of Total Busy Count 47.74% 37.94% 10.45% 2.53% 0.12% 0.72% 0.12% 0.10% 0.02% 0.24% Total Busy Time (ms) Total Busy Percent 0.10%

分析日志 ( 继续 ) 第 3 步 : 打开 disk_cpu_output.csv 文件, 查找 CPU 活动状况和硬盘访问情况 Disk Read Disk Write Disk Flush Process Name( PID) CPU % Count IO Time Size Byte Count IO Time Size Byte Count Idle( 0) 99.

16 分析日志 ( 继续 ) 第 3 步 : 打开 disk_cpu_output.csv 文件, 查找 CPU 活动状况和硬盘访问情况 Disk Read Disk Write Disk Flush Process Name( PID) CPU % Count IO Time Size Byte Count IO Time Size Byte Count Idle( 0) Process1.exe( 3244) IO Time Process2.exe( 1588) System( 4) svchost.exe( 952) 文件将显示进程对存储的读写操作, 以及每次读写操作的大小频繁的存储访问将导致平台功耗浪费 4 小时以上的测试后, 休闲状态占整体的 99.95% 以上才能符合 Windows* 联网待机的要求 16

Results have been estimated based on internal Intel analysis and are provided for informational purposes

17 问题 -1: 频繁的存储访问频繁的存储访问调用堆栈会显示执行存储操作的进程路径 Windows Performance Analyzer overtime 视图显示了存储访问导致平台被频繁唤醒 17 The WPA trace shown is based on the Intel Mobile Processor using Windows Performance Analyzer instrument. Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance/power

18 优化后存储访问情况优化后的存储访问 18

19 问题 2: 进程唤醒长时间活动无系统进程活动 10 seconds activity 解决方案??? 19

20 优化 CPU 使用时间过长的解决方案注册服务或者通过获取通知来确定显示是否被关 HPOWERNOTIFY WINAPI RegisterPowerSettingNotification( _In_ HANDLE hrecipient, _In_ LPCGUID PowerSettingGuid, _In_ DWORD Flags); 应用程序 : 接受一个叫 WM_POWERBROADCAST 的消息, 参数 wparam 为 PBT_POWERSETTINGCHANGE, 参数 lparam 为一个指向 POWERBROADCAST_SETTING 结构的指针服务 : 接受一个 HandlerEx 的回调函数它通过 RegisterServiceCtrlHandlerEx 函数进行注册发送给回调函数 HandlerEx 的参数 lpeventdata 为一个指向 POWERBROADCAST_SETTING 结构的指针设置恰当的 GUID 通知能最大减少服务在联网待机下被延缓 20

21 优化后 CPU 的活动注册服务获取通知来减少在联网待机下的活动当显示器关闭时, 通知应用程序或服务 21

22 总结软件对联网待机有明显的影响包括操作系统, 驱动和独立软件供应商 (ISV) 的应用程序应用程序或服务在联网待机时应尽可能少活动或不活动应用程序开发商应可能让程序在联网待机时被挂起来满足联网待机的要求过多的读写存储操作对平台功耗有明显的影响通过注册事件获取功耗变化通知的方法能很好的帮助减少 CPU 在联网待机下的使用联网待机时,CPU 活动因子要求小于 0.03% 22

23 下一步 OEMs 应和 ISVs ( 第三方软件开发商 ) 合作来评估他们的软件对联网待机的影响开发者应使用 Windows* HCK 工具来检查他们的应用程序是否对联网待机有影响通过论坛等询问优化联网待机应用程序的方法和我们联系咨询如何优化联网待机应用程序加入 Mobile PC Extended Battery Life 工作组 (EBL WG) (eblwginfo@ebl.org) 23

24 引用 Connected Standby Requirement Source: System Power Capability structure Registering for Power Events RegisterPowerSettingNotification function Optimizing application for Connected standby (English) applications-for-connected-standby. Optimizing application for Connected standby (Mandarin) 24

25 Legal Disclaimer INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. A "Mission Critical Application" is any application in which failure of the Intel Product could result, directly or indirectly, in personal injury or death. SHOULD YOU PURCHASE OR USE INTEL'S PRODUCTS FOR ANY SUCH MISSION CRITICAL APPLICATION, YOU SHALL INDEMNIFY AND HOLD INTEL AND ITS SUBSIDIARIES, SUBCONTRACTORS AND AFFILIATES, AND THE DIRECTORS, OFFICERS, AND EMPLOYEES OF EACH, HARMLESS AGAINST ALL CLAIMS COSTS, DAMAGES, AND EXPENSES AND REASONABLE ATTORNEYS' FEES ARISING OUT OF, DIRECTLY OR INDIRECTLY, ANY CLAIM OF PRODUCT LIABILITY, PERSONAL INJURY, OR DEATH ARISING IN ANY WAY OUT OF SUCH MISSION CRITICAL APPLICATION, WHETHER OR NOT INTEL OR ITS SUBCONTRACTOR WAS NEGLIGENT IN THE DESIGN, MANUFACTURE, OR WARNING OF THE INTEL PRODUCT OR ANY OF ITS PARTS. Intel may make changes to specifications and product descriptions at any time, without notice. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined". Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. The information here is subject to change without notice. Do not finalize a design with this information. The products described in this document may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request. Intel product plans in this presentation do not constitute Intel plan of record product roadmaps. Please contact your Intel representative to obtain Intel's current plan of record product roadmaps. Intel processor numbers are not a measure of performance. Processor numbers differentiate features within each processor family, not across different processor families. Go to: Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. Copies of documents which have an order number and are referenced in this document, or other Intel literature, may be obtained by calling , or go to: Intel, Sponsors of Tomorrow and the Intel logo are trademarks of Intel Corporation in the United States and other countries. *Other names and brands may be claimed as the property of others. Copyright 2013 Intel Corporation. 25

26 Risk Factors The above statements and any others in this document that refer to plans and expectations for the first quarter, the year and the future are forward-looking statements that involve a number of risks and uncertainties. Words such as anticipates, expects, intends, plans, believes, seeks, estimates, may, will, should and their variations identify forward-looking statements. Statements that refer to or are based on projections, uncertain events or assumptions also identify forward-looking statements. Many factors could affect Intel s actual results, and variances from Intel s current expectations regarding such factors could cause actual results to differ materially from those expressed in these forward-looking statements. Intel presently considers the following to be the important factors that could cause actual results to differ materially from the company s expectations. Demand could be different from Intel's expectations due to factors including changes in business and economic conditions; customer acceptance of Intel s and competitors products; supply constraints and other disruptions affecting customers; changes in customer order patterns including order cancellations; and changes in the level of inventory at customers. Uncertainty in global economic and financial conditions poses a risk that consumers and businesses may defer purchases in response to negative financial events, which could negatively affect product demand and other related matters. Intel operates in intensely competitive industries that are characterized by a high percentage of costs that are fixed or difficult to reduce in the short term and product demand that is highly variable and difficult to forecast. Revenue and the gross margin percentage are affected by the timing of Intel product introductions and the demand for and market acceptance of Intel's products; actions taken by Intel's competitors, including product offerings and introductions, marketing programs and pricing pressures and Intel s response to such actions; and Intel s ability to respond quickly to technological developments and to incorporate new features into its products. The gross margin percentage could vary significantly from expectations based on capacity utilization; variations in inventory valuation, including variations related to the timing of qualifying products for sale; changes in revenue levels; segment product mix; the timing and execution of the manufacturing ramp and associated costs; start-up costs; excess or obsolete inventory; changes in unit costs; defects or disruptions in the supply of materials or resources; product manufacturing quality/yields; and impairments of long-lived assets, including manufacturing, assembly/test and intangible assets. Intel's results could be affected by adverse economic, social, political and physical/infrastructure conditions in countries where Intel, its customers or its suppliers operate, including military conflict and other security risks, natural disasters, infrastructure disruptions, health concerns and fluctuations in currency exchange rates. Expenses, particularly certain marketing and compensation expenses, as well as restructuring and asset impairment charges, vary depending on the level of demand for Intel's products and the level of revenue and profits. Intel s results could be affected by the timing of closing of acquisitions and divestitures. Intel s current chief executive officer plans to retire in May 2013 and the Board of Directors is working to choose a successor. The succession and transition process may have a direct and/or indirect effect on the business and operations of the company. In connection with the appointment of the new CEO, the company will seek to retain our executive management team (some of whom are being considered for the CEO position), and keep employees focused on achieving the company s strategic goals and objectives. Intel's results could be affected by adverse effects associated with product defects and errata (deviations from published specifications), and by litigation or regulatory matters involving intellectual property, stockholder, consumer, antitrust, disclosure and other issues, such as the litigation and regulatory matters described in Intel's SEC reports. An unfavorable ruling could include monetary damages or an injunction prohibiting Intel from manufacturing or selling one or more products, precluding particular business practices, impacting Intel s ability to design its products, or requiring other remedies such as compulsory licensing of intellectual property. A detailed discussion of these and other factors that could affect Intel s results is included in Intel s SEC filings, including the company s most recent Form 10-Q, report on Form 10-K and earnings release. Rev. 1/17/13 26

Microsoft Word - Atmel-45136A-Pick-Best-Microcontroller-Strom-Eiland-Flodell_Article_CS

Microsoft Word - Atmel-45136A-Pick-Best-Microcontroller-Strom-Eiland-Flodell_Article_CS 如何为您的下一款设计选出最好的 8 位或 32 位微控制器作者 : Atmel 产品营销高级总监 Oyvind Strom Atmel 产品营销总监 Andreas Eieland Atmel 研发工具部门高级产品营销经理 Henrik Flodell 不久之前, 嵌入式系统还是既昂贵