1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2010-2014 Intel Corporation.
7 This chapter describes the packages required to compile the DPDK.
11 If the DPDK is being used on an Intel® Communications Chipset 89xx Series platform,
12 please consult the *Intel® Communications Chipset 89xx Series Software for Linux Getting Started Guide*.
14 BIOS Setting Prerequisite on x86
15 --------------------------------
17 For the majority of platforms, no special BIOS settings are needed to use basic DPDK functionality.
18 However, for additional HPET timer and power management functionality,
19 and high performance of small packets, BIOS setting changes may be needed.
20 Consult the section on :ref:`Enabling Additional Functionality <Enabling_Additional_Functionality>`
21 for more information on the required changes.
25 If UEFI secure boot is enabled, the Linux kernel may disallow the use of
26 UIO on the system. Therefore, devices for use by DPDK should be bound to the
27 ``vfio-pci`` kernel module rather than ``igb_uio`` or ``uio_pci_generic``.
28 For more details see :ref:`linux_gsg_binding_kernel`.
30 Compilation of the DPDK
31 -----------------------
33 **Required Tools and Libraries:**
37 The setup commands and installed packages needed on various systems may be different.
38 For details on Linux distributions and the versions tested, please consult the DPDK Release Notes.
40 * General development tools including a supported C compiler such as gcc (version 4.9+) or clang (version 3.4+).
42 * For RHEL/Fedora systems these can be installed using ``dnf groupinstall "Development Tools"``
44 * For Ubuntu/Debian systems these can be installed using ``apt install build-essential``
46 * Python 3.5 or later.
48 * Meson (version 0.47.1+) and ninja
50 * ``meson`` & ``ninja-build`` packages in most Linux distributions
52 * If the packaged version is below the minimum version, the latest versions
53 can be installed from Python's "pip" repository: ``pip3 install meson ninja``
55 * Library for handling NUMA (Non Uniform Memory Access).
57 * ``numactl-devel`` in RHEL/Fedora;
59 * ``libnuma-dev`` in Debian/Ubuntu;
61 * Linux kernel headers or sources required to build kernel modules.
65 Please ensure that the latest patches are applied to third party libraries
66 and software to avoid any known vulnerabilities.
71 * Intel® C++ Compiler (icc). For installation, additional libraries may be required.
72 See the icc Installation Guide found in the Documentation directory under the compiler installation.
74 * IBM® Advance ToolChain for Powerlinux. This is a set of open source development tools and runtime libraries
75 which allows users to take leading edge advantage of IBM's latest POWER hardware features on Linux. To install
76 it, see the IBM official installation document.
78 **Additional Libraries**
80 A number of DPDK components, such as libraries and poll-mode drivers (PMDs) have additional dependencies.
81 For DPDK builds, the presence or absence of these dependencies will be automatically detected
82 enabling or disabling the relevant components appropriately.
84 In each case, the relevant library development package (``-devel`` or ``-dev``) is needed to build the DPDK components.
86 For libraries the additional dependencies include:
88 * libarchive: for some unit tests using tar to get their resources.
90 * libelf: to compile and use the bpf library.
92 For poll-mode drivers, the additional dependencies for each driver can be
93 found in that driver's documentation in the relevant DPDK guide document,
94 e.g. :doc:`../nics/index`
97 Running DPDK Applications
98 -------------------------
100 To run an DPDK application, some customization may be required on the target machine.
107 * Kernel version >= 3.16
109 The kernel version required is based on the oldest long term stable kernel available
110 at kernel.org when the DPDK version is in development.
111 Compatibility for recent distribution kernels will be kept, notably RHEL/CentOS 7.
113 The kernel version in use can be checked using the command::
117 * glibc >= 2.7 (for features related to cpuset)
119 The version can be checked using the ``ldd --version`` command.
121 * Kernel configuration
123 In the Fedora OS and other common distributions, such as Ubuntu, or Red Hat Enterprise Linux,
124 the vendor supplied kernel configurations can be used to run most DPDK applications.
126 For other kernel builds, options which should be enabled for DPDK include:
130 * PROC_PAGE_MONITOR support
132 * HPET and HPET_MMAP configuration options should also be enabled if HPET support is required.
133 See the section on :ref:`High Precision Event Timer (HPET) Functionality <High_Precision_Event_Timer>` for more details.
135 .. _linux_gsg_hugepages:
137 Use of Hugepages in the Linux Environment
138 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
140 Hugepage support is required for the large memory pool allocation used for packet buffers
141 (the HUGETLBFS option must be enabled in the running kernel as indicated the previous section).
142 By using hugepage allocations, performance is increased since fewer pages are needed,
143 and therefore less Translation Lookaside Buffers (TLBs, high speed translation caches),
144 which reduce the time it takes to translate a virtual page address to a physical page address.
145 Without hugepages, high TLB miss rates would occur with the standard 4k page size, slowing performance.
147 Reserving Hugepages for DPDK Use
148 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
150 The allocation of hugepages should be done at boot time or as soon as possible after system boot
151 to prevent memory from being fragmented in physical memory.
152 To reserve hugepages at boot time, a parameter is passed to the Linux kernel on the kernel command line.
154 For 2 MB pages, just pass the hugepages option to the kernel. For example, to reserve 1024 pages of 2 MB, use::
158 For other hugepage sizes, for example 1G pages, the size must be specified explicitly and
159 can also be optionally set as the default hugepage size for the system.
160 For example, to reserve 4G of hugepage memory in the form of four 1G pages, the following options should be passed to the kernel::
162 default_hugepagesz=1G hugepagesz=1G hugepages=4
166 The hugepage sizes that a CPU supports can be determined from the CPU flags on Intel architecture.
167 If pse exists, 2M hugepages are supported; if pdpe1gb exists, 1G hugepages are supported.
168 On IBM Power architecture, the supported hugepage sizes are 16MB and 16GB.
172 For 64-bit applications, it is recommended to use 1 GB hugepages if the platform supports them.
174 In the case of a dual-socket NUMA system,
175 the number of hugepages reserved at boot time is generally divided equally between the two sockets
176 (on the assumption that sufficient memory is present on both sockets).
178 See the Documentation/admin-guide/kernel-parameters.txt file in your Linux source tree for further details of these and other kernel options.
182 For 2 MB pages, there is also the option of allocating hugepages after the system has booted.
183 This is done by echoing the number of hugepages required to a nr_hugepages file in the ``/sys/devices/`` directory.
184 For a single-node system, the command to use is as follows (assuming that 1024 pages are required)::
186 echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
188 On a NUMA machine, pages should be allocated explicitly on separate nodes::
190 echo 1024 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
191 echo 1024 > /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages
195 For 1G pages, it is not possible to reserve the hugepage memory after the system has booted.
197 Using Hugepages with the DPDK
198 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
200 Once the hugepage memory is reserved, to make the memory available for DPDK use, perform the following steps::
203 mount -t hugetlbfs nodev /mnt/huge
205 The mount point can be made permanent across reboots, by adding the following line to the ``/etc/fstab`` file::
207 nodev /mnt/huge hugetlbfs defaults 0 0
209 For 1GB pages, the page size must be specified as a mount option::
211 nodev /mnt/huge_1GB hugetlbfs pagesize=1GB 0 0