This article explains how to create your own OpenMP* thread mapping to OS proc IDs with Intel® C/C++ and Fortran compiler, by setting environment variable KMP_AFFINITY. It also provides some thread affinity demo results on when use different settings.
intel compiler
Intel Tool Helps SW Developers Develop More Secure Applications
There has been a steady occurrence of security breaches at prestigious companies over the last weeks, months and years. These breaches are becoming far too frequent and, as the folks at Amazon and Zappos know, expensive.
Краткое руководство по оптимизации приложения с помощью компиляторов Intel двенадцатой версии
Пошаговое руководство по повышению производительности приложения
-Mr Compiler, may I help you with the loop vectorization? -Not a disservice, please.
Any parent knows the simple rule: "Never help a child with a task he can succeed at himself. Otherwise you don't make any good for the kid, for you and for the whole planet".
While a compiler is not a child (actually it is - because Intel C/C++ Compiler is less than 16 years old yet), the rule is fully applicable to it as well.
To prove it let's look at the following simple code from the open source OpenCV library.
While a compiler is not a child (actually it is - because Intel C/C++ Compiler is less than 16 years old yet), the rule is fully applicable to it as well.
To prove it let's look at the following simple code from the open source OpenCV library.
Intel® Software Tools give SAS* 9.2 a 2.68x performance boost on Intel® Xeon® processor 5500 series-based servers
Business analytics have become a fundamental asset for leading enterprises, turning mountains of data from diverse sources into actionable information that drives sound business decisions. SAS is a global leader in this field, helping companies make better decisions by gleaning reliable insights from data about their customers, suppliers, operations, performance and more. The value of these insights depends not only on their validity, but also on how quickly they are obtained.
Setting Up an Intel® TBB Project in Microsoft Visual Studio* video
Watch this video on the Intel® Learning Lab to learn how to set up your Microsoft Visual Studio* project to use Intel® TBB.
英特尔编译器优化系列：深入IPO优化
在上一篇文章《英特尔编译器优化系列：初识IPO优化》中，我们认识了IPO以及IPO的使用步骤。下面让我们进一步深入了解IPO。
使用IPO优化大型应用程序
我们知道，IPO在“编译”时将源代码转换成中间语言文件，然后在“链接”时将所有的中间语言文件合并为一个中间语言文件，然后对其进行分析与优化，优化后生成一个的二进制文件，然后传递给链接器进行链接。因此我们会发现“编译”这一步的速度是非常快的，“链接”的速度要比没有使用IPO时慢得多。这里给“编译”和“链接”打上引号，是特指IPO优化步骤中的两个阶段，请参考《英特尔编译器优化系列：初识IPO优化》内的“IPO示意图”。
使用IPO优化大型应用程序
我们知道，IPO在“编译”时将源代码转换成中间语言文件，然后在“链接”时将所有的中间语言文件合并为一个中间语言文件，然后对其进行分析与优化，优化后生成一个的二进制文件，然后传递给链接器进行链接。因此我们会发现“编译”这一步的速度是非常快的，“链接”的速度要比没有使用IPO时慢得多。这里给“编译”和“链接”打上引号，是特指IPO优化步骤中的两个阶段，请参考《英特尔编译器优化系列：初识IPO优化》内的“IPO示意图”。
英特尔编译器优化系列：初识IPO优化
认识IPO
IPO优化（全称Interprocedural Optimization）在很长一段时间内都是英特尔编译器的几大特色优化手段之一。在我刚接触英特尔编译器的时候，编译器版本号还是7.0，由于IPO易于使用而且优化效果出色，IPO就已经被英特尔编译器用户广泛使用了。
首先，我们来看一看IPO主要包含哪些优化：
IPO优化（全称Interprocedural Optimization）在很长一段时间内都是英特尔编译器的几大特色优化手段之一。在我刚接触英特尔编译器的时候，编译器版本号还是7.0，由于IPO易于使用而且优化效果出色，IPO就已经被英特尔编译器用户广泛使用了。
首先，我们来看一看IPO主要包含哪些优化：
- Inlining：将函数体插入到函数调用点，以减少函数调用带来的开销。但是并不是一见到函数调用就要inline，因为inline也是有一定开销的，inline后生成的代码变大了，过大的代码可能导致i-cache miss的问题。所以英特尔编译器会分析源代码，根据具体情况来决定是否要做inlining。Inlining的变种是Partial inlining，例如下面伪代码
void foo()
{
some work here...
if (...)
{
some other work here...
}
Intel Compiler for Mac OS Get compiler options from Xcode
How do I get the compiler options used in Xcode 3.0 so that I can use them when compiling from the command line?
