User Guide

Contents

Before Annotating Code for Deeper Analysis

Before you can
mark
the best parallel opportunities by adding annotations , you need to
choose
likely places to add parallelism. This section introduces several topics that explain factors you should consider as you closely examine the candidate code regions and their execution.
Each code region where you might add parallelism consists of a single
parallel site
and one or more
parallel tasks
enclosed within the parallel site. Each parallel site defines the scope of parallel execution. You can have multiple parallel sites in a program.
No matter how much you improve one part of your program, the program cannot complete any faster than the part that you did not speed up. So, focus your efforts on the parts of your program that use the most time.
Use the
Survey Report
provided by the Survey tool to help you understand where your program spends it time.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804