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Oh the Things We'll Sense
A couple of years ago, at a previous IDF, Intel had the illustrious Morgan Freeman do a voice over for a short movie about all the wondrous places that Intel® Atom™ processors would "go" over time. It...
View ArticleOpenMP Critical Sections
Use OpenMP critical sections to prevent multiple threads from accessing the critical section's code at the same time, thus only one active thread can update the data referenced by the code. Critical...
View ArticleIntel TBB Simple Mutex - Example
The following examples shows basic usage of a Intel TBB mutex to protect a shared variable named count using simple mutexes and scoped locks:Simple Mutex Example #include <tbb/mutex.h> int count;...
View ArticleAbout Intel® Threading Building Blocks (Intel® TBB)
Intel® Threading Building Blocks (Intel® TBB) is a high-level parallel programming framework for C++ code that uses a template-based runtime library to help you harness the performance of multi-core...
View ArticleVerify Whether Incidental Sharing Exists
Sharing is incidental only if the task writes to the memory location before any read of the memory location anywhere in the dynamic extent of the task. This is easy to check when the task is a few...
View ArticleSharing Problems
Errors happen in a parallel program when two tasks that are executing simultaneously contain operations that access the same memory location. If one of them writes to the location and the other one...
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Fixing Annotation-related Errors Detected by the Suitability Tool
As the Suitability tool executes your target executable, it scans for a proper sequence of Intel Advisor annotations. If it detects an annotation-related or an error related to very small task sizes,...
View ArticleTask Patterns
To summarize:You choose parallel sites in your program.You choose tasks in your parallel sites.Tasks in a parallel site can execute in parallel with one another and with tasks in an outer parallel...
View ArticleSampling and Power Drivers
Intel® VTune™ Amplifier uses kernel drivers to enable the hardware event-based sampling and Intel Energy Profiler analysis (the latter is available with the VTune Amplifier for Systems only). VTune...
View ArticleHardware Event-based Sampling Collection
The hardware event-based sampling collector of the Intel® VTune™ Amplifier profiles your application using the counter overflow feature of the Performance Monitoring Unit (PMU). The data collector...
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Bandwidth Analysis
Bandwidth analysis type uses event-based sampling collection and is targeted for the Intel® Xeon Phi™ coprocessor (code name: Knights Corner).Bandwidth analysis type measures main components of bus...
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Cycles and uOps Analysis
Cycles and uOps analysis type uses the event-based sampling collection and is targeted for the Intel® microarchitectures code name Nehalem/Westmere.Use this analysis type to identify performance issues...
View ArticlePerformance Analysis with Intel® VTune™ Amplifier
Intel® VTune™ Amplifier introduces the following basic categories of performance analysis:Algorithm AnalysisMicroarchitecture and Platform AnalysisEach category represents a branch in the performance...
View ArticleRelated Information
For better understanding of the performance data provided by the Intel® VTune™ Amplifier , you are highly recommended to explore additional resources on the web.Intel® Processor InformationFor the most...
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Workflow Location: Interpret Result Data and Resolve Issue
Dynamic AnalysisStatic AnalysisParent topic: AppendixLingua Inglese
View ArticleTask Patterns
To summarize:You choose parallel sites in your program.You choose tasks in your parallel sites.Tasks in a parallel site can execute in parallel with one another and with tasks in an outer parallel...
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Specifying Project Properties Using the Intel Advisor Standalone GUI
To launch the Intel Advisor Standalone GUI, use the advixe-gui command after you set up your command line environment or use the supplied Start menu shortcut.This topic contains the following sections:...
View ArticleTips for Annotation Use with C/C++ Programs
The following topics provide tips related to using annotations with C/C++ programs:Depending on your particular environment, you may want to control the expansion of macros in advisor-annotate.h by...
View ArticleAbout Using the Intel Advisor Annotation Definitions Files
Intel® Advisor provides macro or routine definitions that enable use of its annotations for each language:For C/C++, the advisor-annotate.h header file defines macros that begin with ANNOTATE_, so you...
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