---
title: 'Intel MPI Library'
taxonomy:
    category:
        - docs
external_links:
    process: true
    no_follow: true
    target: _blank
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---

[toc]

## Environment Settings{#enviroment}
### Software Version and System Requirements{#version}
Version    | Module file Name | System A | System B/C  | System G  | Cloud System| Notes
--- | --- | --- | --- | --- | --- | ---
2024.0 | intel/2024.0 | + | +| - | + | Introduced in April 2024. Intel compiler + MKL + TBB
2023.2 (default)  | intel/2023.2 | + | +| - | + | Introduced in April 2024. Intel compiler + MKL + TBB
2023.2-rt | intel/2023.2-rt | + | +| - | + | Introduced in April 2024. runtime libraries
2023.1 | intel/2023.1 | + | + | - | + | Introduced in August 2023.
2023.1-rt | intel/2023.1-rt | + | + | - | + | Introduced in August 2023. runtime libraries
2022.3 | intelmpi/2022.3 | + | + | - | + | Introduced in November 2022
2022.3-rt | intelmpi/2022.3-rt | + | + | - | + | Introduced in November 2022. runtime library

<!--
注：Intel CompilerとIntel MPIのバージョンは一致しない場合があります
-->

\+ ： Available for all users  
\- ： Not available

<!--
コンパイラとして、 [Intelコンパイラ](/compilers/intel) または [GNUコンパイラ](/compilers/gnu) を利用します。システムにログインした時点では、Intelコンパイラがデフォルトで利用できるようになっています。GNUコンパイラを利用される場合は、以下のようにmoduleコマンドを実行し、コンパイラを切り替えてください。

```nohighlight
$ module switch PrgEnvIntel PrgEnvGCC
```

Intel MPIライブラリのバージョンを切り替えたい場合は、以下のようにmoduleコマンドを実行してください。

```nohighlight
$ module switch impi/4.1.0 impi/4.0.3
```

moduleコマンドの詳細は [Modules](/config/modules) をご覧ください。
-->

### Level of Thread Parallel Support{#threadsafe}

The thread parallel support level available in  Intel MPI is MPI_THREAD_MULTIPLE. MPI functions can be called from each thread with no restriction.

## How to Compile and Execute{#usage}

### How to Compile{#compile}

**Compile commands (Intel compiler)**

Language |  Command   | Operands                            
--------- | --------- | ----------------------------
 Fortran |  mpiifort |  mpiifort Option File Name
 C |        mpiicc |    mpiicc Option File Name
 C++ |      mpiicpc |   mpiicpc Option File Name
**Compile Commands（GNU compiler）**

Language |  Command   | Operands                            
--------- | -------- | --------------------------
 Fortran 95 |  mpif90  |  mpif90 Option File Name
 Fortran 77 | mpif77 | mpif77 Option File Name
 C |        mpigcc |    mpicc Option File Name
 C++ |      mpigcxx |   mpicxx Option File Name

**Examples of Compiling**

```nohighlight
$ mpiifort -O3 -parallel sample_mpi.f90
```
<!--
### オプション{#option}

Intel MPI のコンパイラでは、 [Intelコンパイラのオプション](/compilers/intel#option) を利用することができます。ただし、オプション -static については利用できません。

* **主要オプション（並列化、最適化など）**

    オプション名      |  説明                 
    ------------ | -------------------
    -static_mpi |  MPIライブラリを静的にリンクします。
-->

### How to Execute{#exec}

To execute the compiled MPI program, use **tssrun** command for interactive processing and **srun** for batch processing. For both interactive processing and batch processing, the number of parallelism is specified by the --rsc option argument p. Please refer to [sample](#sample) for details.

**Example (interactive processing)**
```nohighlight
$ tssrun --rsc p=2 ./a.out
```

## Sampl{#sample}
### MPI program execution with interactive processing{#tss}
Please refer to the [Interactive Processing](/run/interactive) for details on the execution with interactive processing.

* **Execute in 8 parallels**

```nohighlight
$ tssrun --rsc p=8 ./a.out
```

* **Execute in combination with thread parallelism（MPI 4 parallel, OpenMP 8 parallel）**

```nohighlight
$ tssrun --rsc p=4:t=8:c=8 ./a.out
```

### MPI program execution in batch{#slurm}
Please refer to the [batch processing](/run/batch) for details on the batch execution.

* **Execute in 8 parallels**

```nohighlight
$ cat sample.sh
#!/bin/bash
#============ SBATCH Directives =======
#SBATCH -p gr19999b
#SBATCH -t 1:0:0
#SBATCH --rsc p=8
#SBATCH -o %x.%A.out

#============ Shell Script ============
srun ./a.out
$ sbatch sample.sh
```

* **Execute in combination with thread parallelism（MPI 4 parallel, OpenMP 8 parallel）**

```nohighlight
$ cat sample.sh
#!/bin/bash
#============ SBATCH Directives =======
#SBATCH -p gr19999b
#SBATCH -t 1:0:0
#SBATCH --rsc p=4:t=8:c=8:m=8G
#SBATCH -o %x.%A.out

#============ Shell Script ============
srun ./a.out
$ sbatch sample.sh
```

## Manual{#manual}
* [Intel MPI Library Developer Guide for Linux* OS Developer Guide](https://www.intel.com/content/www/us/en/develop/documentation/mpi-developer-guide-linux/top.html)
* [Intel MPI Library Developer Guide for Linux* OS Developer Reference](https://www.intel.com/content/www/us/en/develop/documentation/mpi-developer-reference-linux/top.html)

<!--
### Ver 5.1

* [Intel MPI Library for Linux OS Reference Manual](https://web.kudpc.kyoto-u.ac.jp/Compiler_Manual/Intel/Intel_MPI_5.1/Reference_Manual.pdf)
* [Intel MPI Library for Linux OS User Guide](https://web.kudpc.kyoto-u.ac.jp/Compiler_Manual/Intel/Intel_MPI_5.1/User_Guide.pdf)

### Ver 2018

* [Intel MPI Library for Linux OS Developer Reference](https://web.kudpc.kyoto-u.ac.jp/Compiler_Manual/Intel/Intel_MPI_2018/intelmpi-2018-developer-reference-linux.pdf)
* [Intel MPI Library for Linux OS Developer Guide](https://web.kudpc.kyoto-u.ac.jp/Compiler_Manual/Intel/Intel_MPI_2018/intelmpi-2018-developer-guide-linux.pdf)

### Ver 2019

* [Intel MPI Library for Linux OS Developer Reference](https://web.kudpc.kyoto-u.ac.jp/Compiler_Manual/Intel/intel_parallel_studio_xe_2019_3/en/mpi/mpi_dev_reference_lin/index.htm)
* [Intel MPI Library for Linux OS Developer Guide](https://web.kudpc.kyoto-u.ac.jp/Compiler_Manual/Intel/intel_parallel_studio_xe_2019_3/en/mpi/mpi_dev_guide_lin/index.htm)
-->

## Link{#link}

* [Intel MPI Library](https://www.intel.com/content/www/us/en/developer/tools/oneapi/mpi-library.html)