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================================================================================

ABSTRACT

--------

Discusses how to build, install and test the PSM2 library source code.

Contains the following sections:

- INTRODUCTION

- DEPENDENCIES

- BUILDING

  * BUILDING USING MAKEFILE

  * BUILDING USING RPMBUILD (CREATING SOURCE AND BINARY RPM'S)

- INSTALLING

  * INSTALLING USING MAKEFILE

  * INSTALLING USING EITHER YUM OR DNF

- TESTING

- RELATED SOFTWARE TO PSM2

- SUPPORTING DOCUMENTATION

INTRODUCTION

============

This README file discusses how to build, install and test the PSM2 library

source code.

The PSM2 library supports a number of fabric media and stacks, and all of

them run on version 7.X of Red Hat Enterprise Linux (abbreviated: RHEL), and

SuSE SLES.

Only the x86_64 architecture is supported.

Building PSM2 is possible on RHEL 7.2+ as it ships with hfi1 kernel driver.

For older RHEL 7.x versions and SuSE SLES, OPA is not natively supported

in the kernel and therefore, building PSM2 is not possible unless

you have the correct kernel-devel package or use latest versions of IFS.

There are two mechanisms for building and installing the PSM2 library:

  1. Use provided Makefiles to build and install or

  2. Generate the *.rpm files which you can then install using either

     yum or dnf command

DEPENDENCIES

============

The following packages are required to build the PSM2 library source code:

(all packages are for the x86_64 architecture)

compat-rdma-devel

gcc-4.8.2

glibc-devel

glibc-headers

kernel-headers

Additional packages for GPU Direct support include:

NVIDIA CUDA toolkit 8.0 or greater. Older versions are not supported.

In addition to depending on these packages, root privileges are required to

install the runtime libraries and development header files into standard

system location.

BUILDING

========

The instructions below use $BASENAME, $PRODUCT and $RELEASE to refer to

the base name of the tarball, RPM that will be generated and the product

and release identifiers of the RPM.

The base name of the RPM changes depending on which version/branch

of code you derive the tar file from.

Up until v10.2 of PSM2, the base name for the RPM is hfi1-psm.

From v10.2 onwards, the base name will be libpsm2. The internal

library remains unchanged and is still libpsm2.so.2.

BUILDING USING MAKEFILES

------------------------

1. Untar the tarball:

	$ tar zxvf $BASENAME-$PRODUCT-$RELEASE.tar.gz

2. Change directory into the untarred location:

	$ cd $BASENAME-$PRODUCT-$RELEASE

3. Build:

  3.1. To build with GNU C (gcc), run make on the command line:

	$ make

	- or -

	$ make CCARCH=gcc

  3.2 To build with Intel C (icc), specify the correct CCARCH:

	$ make CCARCH=icc

  3.3. To build with CUDA support, specify PSM_CUDA=1

	on the command line along with the desired compiler:

	$ make PSM_CUDA=1 CCARCH=gcc

	- or -

	$ make PSM_CUDA=1 CCARCH=icc

BUILDING USING RPMBUILD

-----------------------

1. Run this command from your $PWD to generate rpm, srpm files

	$ ./makesrpm.sh a

  This command results in the following collection of rpm's and source

  code rpm's under your $PWD/temp.X/ directory.

  ("X" is the pid of the bash script that created the srpm and rpm files)

  (Result shown here for RHEL systems.)

  RPMS/x86_64/libpsm2-compat-10.3.7-1x86_64.rpm

  RPMS/x86_64/libpsm2-devel-10.3.7-1x86_64.rpm

  RPMS/x86_64/libpsm2-10.3.7-1x86_64.rpm

  RPMS/x86_64/libpsm2-debuginfo-10.3.7-1x86_64.rpm

  SRPMS/libpsm2-10.3.7-1.src.rpm

  1.1. Optionally for GPU Direct support run this command from your $PWD to

       generate rpm, srpm files

       $ ./makesrpm.sh a -cuda

      This command results in the following collection of rpm's and source code

      rpm's under your $PWD/temp.X/ directory. ("X" is the pid of the bash

      script that created the srpm and rpm files):

      RPMS/x86_64/libpsm2-10.3.7-1cuda.x86_64.rpm

      RPMS/x86_64/libpsm2-compat-10.3.7-1cuda.x86_64.rpm

      RPMS/x86_64/libpsm2-devel-10.3.7-1cuda.x86_64.rpm

      SRPMS/x86_64/libpsm2-10.3.7-1cuda.src.rpm

  On systems with SLES 12.3 or newer, the package name for the base libpsm2

  RPM will be:

  	libpsm2-2-10.3.7-1.x86_64.rpm

  Other supporting RPM package names will be as listed above.

2. To build rpm files from the srpm file with Intel C (icc), specify the

  correct CCARCH in the rpmbuild environment:

 	$ env CCARCH=icc rpmbuild --rebuild SRPMS/libpsm2-10.3.7-1.src.rpm

INSTALLING

==========

INSTALLING USING MAKEFILE

-------------------------

Install the libraries and header files on the system (as root):

	$ make install

The libraries will be installed in /usr/lib64, and the header files will

be installed in /usr/include.

This behavior can be altered by using the "DESTDIR" and "LIBDIR" variables on

the "make install" command line. "DESTDIR" will add a leading path component

to the overall install path and "LIBDIR" will change the path where libraries

will be installed. For example, "make DESTDIR=/tmp/psm-install install" will

install all files (libraries and headers) into "/tmp/psm-install/usr/...",

"make DESTDIR=/tmp/psm-install LIBDIR=/libraries install" will install the

libraries in "/tmp/psm-install/libraries" and the headers in

"/tmp/psm-install/usr/include", and "make LIBDIR=/tmp/libs install" will

install the libraries in "/tmp/libs" and the headers in "/usr/include".

INSTALLING USING EITHER YUM OR DNF

----------------------------------

You can install the rpm's and source rpm's previously built using rpmbuild using

either the yum or dnf command as the root user.  See the appropriate man page for

details of installing rpm's.

Note: It is also possible to use rpm command to install rpm's, but it is recommended

that one use yum/dnf as rpm tool has issues with name changes and obsoletes tags.

yum or dnf should be better able to resolve dependency issues.

RELATED SOFTWARE TO PSM2

========================

MPI Libraries supported

-----------------------

A large number of open source (Open MPI, MVAPICH2) and Vendor MPI

implementations support PSM2 for optimized communication on HCAs. Vendor MPI

implementations (HP-MPI, Intel MPI 4.0 with PMI, Platform/Scali MPI)

require that the PSM2 runtime libraries be installed and available on

each node. Usually a configuration file or a command line switch to mpirun

needs to be specified to utilize the PSM2 transport.

Open MPI support

---------------

If using a version of Open MPI that is not packaged within IFS release, it

is required to use at least v1.10.4. Older versions are not supported. Since

v1.10.4 is not in active development, it is further recommended to use upstream

versions v2.1.2 or newer.

If NVIDIA* CUDA* support is desired, you can use Open MPI built with CUDA*

support provided by Intel in the IFS installer 10.4 or newer. This Open MPI

build is identified with the "-cuda-hfi" tag to the Open MPI base version

name.  The NVIDIA* CUDA* support changes have also been accepted into v2.1.3,

v3.0.1 and v3.1.0 branches of upstream Open MPI repository.

PSM2 header and runtime files need to be installed on a node where the Open MPI

build is performed. All compute nodes additionally should have the PSM2 runtime

libraries available on them. Open MPI provides a standard configure, make and

make install mechanism which will detect and build the relevant PSM2 network

modules for Open MPI once the header and runtime files are detected.

MVAPICH2 support

----------------

MVAPICH2 supports PSM2 transport for optimized communication on HFI hardware.

OPA IFS supports MVAPICH2 v2.1 (or later). PSM2 header and runtime files

need to be installed on a node where MVAPICH2 builds are performed. All

compute nodes should also have the PSM2 runtime libraries available on them.

For building and installing MVAPICH2 with OPA support, refer to MVAPICH2

user guides here:

http://mvapich.cse.ohio-state.edu/userguide/

(Note: Support for PSM2 is included in v2.2 and newer)

OFED Support

------------

Intel OPA is not yet included within OFED. But the hfi1 driver is available

publicly at kernel.org.

SUPPORTING DOCUMENTATION

------------------------

PSM2 Programmer's Guide is published along with documentation for "Intel® Omni-Path

Host Fabric Interface PCIe Adapter 100 Series"

(https://www.intel.com/content/www/us/en/support/articles/000016242/network-and-i-o/fabric-products.html)

Refer to this document for description on APIs and environment variables that

are available for use. For sample code on writing applications leveraging the

PSM2 APIs, refer to Section 5.

PSM Compatibility Support

------------

libpsm2-compat suppports applications that use the PSM API instead of

the PSM2 API, through a compatibility library. This library is an interface

between PSM applications and the PSM2 API.

If the system has an application that is coded to use PSM and has requirements

to use PSM2 (i.e. the host has Omni-Path hardware), the compatibility library

must be used.

Please refer to your operating system's documentation to find how to modify the

order in which system directories are searched for dynamic libraries. The

libpsm2-compat version of libpsm_infinipath.so.1 must be earlier on the search

path than that of libpsm-infinipath. Doing so allows applications coded to PSM

to transparently use the PSM2 API and devices which require it.

Please note that the installation path for the libpsm2-compat version of

libpsm_infinipath.so.1 will differ depending on your operating system

specifics. Common locations include:

- /usr/lib64/psm2-compat/

- /usr/lib/psm2-compat/