Intel® MPI Benchmarks User Guide and Methodology Description

# What's New

This section provides changes for the Intel® MPI Benchmarks as compared to the previous versions of this product.

## Changes in Intel® MPI Benchmarks 2017 Update 1

This release includes the following updates as compared to the Intel® MPI Benchmarks 2017:

- Added a new option `-imb_barrier`. See Command-Line Control.

- The `PingPong` and `PingPing` benchmarks are now equivalent to `PingPongSpecificSource` and `PingPingSpecificSource`, respectively. Their old behavior (with `MPI_ANY_SOURCE`) is available in `PingPongAnySource` and `PingPingAnySource`.

## Changes in Intel® MPI Benchmarks 2017

This release includes the following updates as compared to the Intel® MPI Benchmarks 4.1 Update 1:

- Changed default values for the `-sync` and `-root_shift` options. See Command-Line Control.
- Support for the Microsoft* Visual Studio* 2015. Microsoft* Visual Studio* 2010 support is removed.
- Minor improvements and bug fixes.

## Changes in Intel® MPI Benchmarks 4.1 Update 1

This release includes the following updates as compared to the Intel® MPI Benchmarks 4.1:

- Minor improvements and bug fixes.

## Changes in Intel® MPI Benchmarks 4.1

This release includes the following updates as compared to the Intel® MPI Benchmarks 4.0:

- Introduced new benchmarks: `Uniband` and `Biband`. See Parallel Transfer Benchmarks.
- Introduced new options: `-sync` and `-root_shift`. See Command-Line Control.

## Changes in Intel® MPI Benchmarks 4.0

This release includes the following updates as compared to the Intel® MPI Benchmarks 3.2.4:

- Introduced new components `IMB-NBC` and `IMB-RMA` that conform to the MPI-3.0 standard.
- Introduced a new feature to set the appropriate policy for automatic calculation of iterations. You can set the policy using the -`iter` and -`iter_policy` options.
- Added new targets to the Linux* OS Makefiles:
- - `NBC` for building `IMB-NBC`
  - `RMA` for building `IMB-RMA`
- Updated Microsoft* Visual Studio* solutions to include the `IMB-NBC` and `IMB-RMA` targets.
- Support for the Microsoft* Visual Studio* 2013. Microsoft* Visual Studio* 2008 support is removed.

Optimization Notice
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