07 intel v_tune_session_10
•
0 likes•254 views
The document discusses using the Intel VTune Tuning Assistant tool to optimize application performance. It describes tuning at the system, application, and microarchitecture levels. Tuning Assistant provides advice on improving I/O utilization, multithreading, and computation efficiency. It identifies hotspots and offers solutions based on sampling, counters, source code, and assembly analysis.
Recommended
More Related Content
What's hot
What's hot (20)
Similar to 07 intel v_tune_session_10
Similar to 07 intel v_tune_session_10 (20)
More from Niit Care
Recently uploaded
Recently uploaded (20)
07 intel v_tune_session_10
- 1. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Objectives In this session, you will learn to: Use the Tuning Assistant Ver. 1.0 Slide 1 of 16
- 2. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Using Tuning Assistant Tuning assistant is a tool that provides with information that enables you to tune the performance of your application and the way it uses system resources. Ver. 1.0 Slide 2 of 16
- 3. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Understanding the Tuning Methodology Once the optimization goals are clear, you can tune your application at the following three levels: System-level tuning Application-level tuning Microarchitecture-level tuning Ver. 1.0 Slide 3 of 16
- 4. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Understanding the Tuning Methodology (Contd.) System-level tuning: Helps in optimizing the utilization of system resources. Speeds up the performance of the application by improving the way application interacts with the system. Is significant for input/output (I/O) intensive applications. The performance of these applications depends on the performance of the I/O system that provides the I/O service. Can be achieved by using the counter monitor feature of VTune Performance Analyzer. Ver. 1.0 Slide 4 of 16
- 5. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Understanding the Tuning Methodology (Contd.) Application-level tuning: Helps in reducing the execution time of an application. Can be performed by improving the algorithms of the application, implementing threads, and by using Application Programming Interfaces (APIs) and primitives. Can be achieved by identifying the code snippets that have a high impact on the performance of the application. Helps in identifying the code snippets by using the sampling or call graph feature of the VTune Performance Analyzer. Ver. 1.0 Slide 5 of 16
- 6. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Understanding the Tuning Methodology (Contd.) Microarchitecture-level tuning: Increases the performance of an application by improving the way an application runs on the processor. Can be used with processor-intensive applications • If an application is not processor-intensive, then you should first improve processor utilization by using system-level and application-level tuning. – Can be achieved by using the sampling feature of VTune Performance Analyzer. Ver. 1.0 Slide 6 of 16
- 7. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Just a minute Which level of tuning methodology will you use for I/ O-intensive application? Which level of tuning methodology will you use for a process-intensive application? Which level of tuning methodology will you use to reduce the execution time of an application? Answer: System-level tuning Microarchitecture-level tuning Application-level tuning Ver. 1.0 Slide 7 of 16
- 8. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Tuning Methodology for Specific Goals It is a good practice to start tuning an application at the system-level to avoid any system-level bottlenecks. Once you ensure that the processor utilization is high, then you can focus on removing the application-level bottlenecks followed by microarchitecture-level bottlenecks. If you are not sure about the specific goals, then you should follow the following sequence in order to achieve the best performance of an application in the shortest possible time: System-level Application-level Microarchitecture-level Ver. 1.0 Slide 8 of 16
- 9. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Tuning Methodology for Specific Goals (Contd.) There are three main strategies to improve the performance of an application. Each strategy affects processor utilization in a different way: ► Balancing I/O and computation ► Improving the threading model ► Improving the efficiency of computation to: This strategy enables you to speed up the application when the to a single threaded • Add multithreading processor utilization is low. application This Improve the threading modelspeed up the strategy enables you to of a In• this case, you need to make changes at application by accomplishing the same amount the system-level application multithreaded work using to and the application-level. ofenables youless computations.use of • It make effective In this case, you need to make changes at the system resources. • application-level and microarchitecture-level In this case, you need to make changes at the application-level. Ver. 1.0 Slide 9 of 16
- 10. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Launching Tuning Assistant Tuning assistant: Helps you to get more insight into the performance issues in an application and identify the hotspots where performance can be improved. Provides you with the possible solutions to remove or avoid a performance issue. Provides tuning advice for codes, processes, or time ranges that you select in the source, sampling, or counter monitor views. Ver. 1.0 Slide 10 of 16
- 11. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Launching Tuning Assistant (Contd.) The different types of advice that tuning assistant can provide are: Sampling-based advice Counter monitor-based advice Source-based tuning advice Static assembly penalties Ver. 1.0 Slide 11 of 16
- 12. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Activity: Launching the Tuning Assistant Problem Statement: Chris has developed an application in C# that creates a list of natural numbers and displays their sum. However, on execution, the application runs very slowly. To analyze performance of his application, Chris decides to analyze his application using the counter monitor feature of Intel VTune Performance Analyzer and use Tuning Assistant to identify the performance issues and propose possible solutions for the issues. Help Chris perform the required task. Ver. 1.0 Slide 12 of 16
- 13. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Activity: Launching the Tuning Assistant (Contd.) Solution To analyze counter data and use Tuning Assistant to identify system-related performance issues and propose possible solutions for the issues, you need to perform the following tasks: 1. Collect counter monitor data. 2. Launch Tuning Assistant. Ver. 1.0 Slide 13 of 16
- 14. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Activity: Launching the Tuning Assistant (Contd.) Solution The information that tuning assistant provides are as follows: Insight Relevance scale Tuning assistant advice Workload Ver. 1.0 Slide 14 of 16
- 15. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Summary In this session, you learned that: The Tuning Assistant tool of VTune Performance Analyzer tunes the performance of applications. You can tune the application at the following three levels: • System-Level tuning • Application-Level tuning • Microarchitecture-Level tuning It is a good practice to start tuning an application at the system level instead of microarchitecture level. Three main strategies to improve the performance of an application are: Balancing I/O and computation Improving the threading model Improving the efficiency of computation Ver. 1.0 Slide 15 of 16
- 16. Code Optimization and Performance Tuning Using Intel VTune Installing Windows XP Professional Using Attended Installation Summary The tuning assistant helps you to get more insight into the performance issues in an application and identify the hotspots where performance can be improved. The different types of advice that Tuning Assistant can generate are: Sampling-based advice Counter monitor-based advice Source-based tuning advice Static assembly penalties Ver. 1.0 Slide 16 of 16
Editor's Notes
- Share the objective with the student.
- VTune analyzes the data of applications, identifies hotspots in the code and Tuning Assistant provides you suggestions and advice to write that segment of the code efficiently. This reduces the time it takes to execute the code and run the code with the best possible performance.
- Tell the students that it is important to set your optimization goals before you start tuning your application. Tell the students about different levels at which the application can be optimized.
- In this slide, discuss about the system-level tuning.
- In this slide, discuss about the application-level tuning.
- In this slide, discuss about the microarchitecture-level tuning.
- Tell the students that it is advisable to start tuning your application at system-level. This would enable you to achieve the best performance results. For example, if the processor utilization on your system is low and you start tuning your application at the application level. In this case, you might not be able to achieve the best optimization results. However, if you first tune your application at the system-level, then you can increase the processor utilization. Once the processor utilization is high, then tuning your application at the application level would lead to better optimization results.
- In this slide, discuss the three main strategies for improving the processor utilization.
- In this slide, discuss how does the Tuning Assistant enables you to get more insight into the performance issues and helps optimizing your application.
- In this slide, explain the students about different types of advice a Tuning Assistant provides.
- To demonstrate this activity, you can use the data files provided at the following locations: TIRM Datafiles for Faculty Chapter05 Activity01 Natural_Numbers_Sum.zip Natural_Numbers_Sum.zip file contains the optimized and the unoptimized codes. The faculty should first show the demonstration of the unoptimized code. After launching the tuning assistant, the faculty should again run the activity using the optimized code. This would enable the students comparing the results between the optimized and the unoptimized code. In the unoptimized code, the sum of the numbers present in the huge array list is computed in advanced. In this case, when the application prompts the user asking whether to view the sum or not, and the user enters n, the application exits. As a result, the sum has already been computed even if it is not required. However, this is not so in the case of the optimized code. In the optimized code given for the preceding activity, the sum of the huge list of numbers is calculated only when the user wishes to view the sum by entering y.
- To demonstrate this activity, you can use the data files provided at the following locations: TIRM Datafiles for Faculty Chapter05 Activity01 Natural_Numbers_Sum.zip Natural_Numbers_Sum.zip file contains the optimized and the unoptimized codes. The faculty should first show the demonstration of the unoptimized code. After launching the tuning assistant, the faculty should again run the activity using the optimized code. This would enable the students comparing the results between the optimized and the unoptimized code. In the unoptimized code, the sum of the numbers present in the huge array list is computed in advanced. In this case, when the application prompts the user asking whether to view the sum or not, and the user enters n, the application exits. As a result, the sum has already been computed even if it is not required. However, this is not so in the case of the optimized code. In the optimized code given for the preceding activity, the sum of the huge list of numbers is calculated only when the user wishes to view the sum by entering y.
- To demonstrate this activity, you can use the data files provided at the following locations: TIRM Datafiles for Faculty Chapter05 Activity01 Natural_Numbers_Sum.zip Natural_Numbers_Sum.zip file contains the optimized and the unoptimized codes. The faculty should first show the demonstration of the unoptimized code. After launching the tuning assistant, the faculty should again run the activity using the optimized code. This would enable the students comparing the results between the optimized and the unoptimized code. In the unoptimized code, the sum of the numbers present in the huge array list is computed in advanced. In this case, when the application prompts the user asking whether to view the sum or not, and the user enters n, the application exits. As a result, the sum has already been computed even if it is not required. However, this is not so in the case of the optimized code. In the optimized code given for the preceding activity, the sum of the huge list of numbers is calculated only when the user wishes to view the sum by entering y.
- Summarize the session.
- Summarize the session.