X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Flinux_gsg%2Fsys_reqs.rst;h=d0cb66f6bb8837e1270c676f677e3190dcd3071d;hb=e39d9b63664ae44af6214fa236cd989850a50833;hp=76d82e6eef75d245d4ae6fa5bf20d1d9f8a44d11;hpb=c607ccaba01f2ece91ea65b43af348ab77db1d32;p=dpdk.git diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst index 76d82e6eef..d0cb66f6bb 100644 --- a/doc/guides/linux_gsg/sys_reqs.rst +++ b/doc/guides/linux_gsg/sys_reqs.rst @@ -1,32 +1,5 @@ -.. BSD LICENSE - Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in - the documentation and/or other materials provided with the - distribution. - * Neither the name of Intel Corporation nor the names of its - contributors may be used to endorse or promote products derived - from this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +.. SPDX-License-Identifier: BSD-3-Clause + Copyright(c) 2010-2014 Intel Corporation. System Requirements =================== @@ -43,19 +16,26 @@ BIOS Setting Prerequisite on x86 For the majority of platforms, no special BIOS settings are needed to use basic DPDK functionality. However, for additional HPET timer and power management functionality, -and high performance of small packets on 40G NIC, BIOS setting changes may be needed. +and high performance of small packets, BIOS setting changes may be needed. Consult the section on :ref:`Enabling Additional Functionality ` for more information on the required changes. +.. note:: + + If UEFI secure boot is enabled, the Linux kernel may disallow the use of + UIO on the system. Therefore, devices for use by DPDK should be bound to the + ``vfio-pci`` kernel module rather than ``igb_uio`` or ``uio_pci_generic``. + For more details see :ref:`linux_gsg_binding_kernel`. + Compilation of the DPDK ----------------------- -**Required Tools:** +**Required Tools and Libraries:** .. note:: - Testing has been performed using Fedora 18. The setup commands and installed packages needed on other systems may be different. - For details on other Linux distributions and the versions tested, please consult the DPDK Release Notes. + The setup commands and installed packages needed on various systems may be different. + For details on Linux distributions and the versions tested, please consult the DPDK Release Notes. * GNU ``make``. @@ -84,7 +64,22 @@ Compilation of the DPDK x86_x32 ABI is currently supported with distribution packages only on Ubuntu higher than 13.10 or recent Debian distribution. The only supported compiler is gcc 4.9+. -* Python, version 2.6 or 2.7, to use various helper scripts included in the DPDK package. +* Library for handling NUMA (Non Uniform Memory Access). + + * numactl-devel in Red Hat/Fedora; + + * libnuma-dev in Debian/Ubuntu; + + .. note:: + + On systems with NUMA support, `libnuma-dev` (aka `numactl-devel`) + is a recommended dependency when `--legacy-mem` switch is used, + and a *required* dependency if default memory mode is used. + While DPDK will compile and run without `libnuma` + even on NUMA-enabled systems, + both usability and performance will be degraded. + +* Python, version 2.7+ or 3.2+, to use various helper scripts included in the DPDK package. **Optional Tools:** @@ -112,7 +107,11 @@ System Software **Required:** -* Kernel version >= 2.6.34 +* Kernel version >= 3.16 + + The kernel version required is based on the oldest long term stable kernel available + at kernel.org when the DPDK version is in development. + Compatibility for recent distribution kernels will be kept, notably RHEL/CentOS 7. The kernel version in use can be checked using the command:: @@ -129,8 +128,6 @@ System Software For other kernel builds, options which should be enabled for DPDK include: - * UIO support - * HUGETLBFS * PROC_PAGE_MONITOR support @@ -215,56 +212,3 @@ The mount point can be made permanent across reboots, by adding the following li For 1GB pages, the page size must be specified as a mount option:: nodev /mnt/huge_1GB hugetlbfs pagesize=1GB 0 0 - -Xen Domain0 Support in the Linux Environment -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -The existing memory management implementation is based on the Linux kernel hugepage mechanism. -On the Xen hypervisor, hugepage support for DomainU (DomU) Guests means that DPDK applications work as normal for guests. - -However, Domain0 (Dom0) does not support hugepages. -To work around this limitation, a new kernel module rte_dom0_mm is added to facilitate the allocation and mapping of memory via -**IOCTL** (allocation) and **MMAP** (mapping). - -Enabling Xen Dom0 Mode in the DPDK -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -By default, Xen Dom0 mode is disabled in the DPDK build configuration files. -To support Xen Dom0, the CONFIG_RTE_LIBRTE_XEN_DOM0 setting should be changed to “y”, which enables the Xen Dom0 mode at compile time. - -Furthermore, the CONFIG_RTE_EAL_ALLOW_INV_SOCKET_ID setting should also be changed to “y” in the case of the wrong socket ID being received. - -Loading the DPDK rte_dom0_mm Module -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -To run any DPDK application on Xen Dom0, the ``rte_dom0_mm`` module must be loaded into the running kernel with rsv_memsize option. -The module is found in the kmod sub-directory of the DPDK target directory. -This module should be loaded using the insmod command as shown below (assuming that the current directory is the DPDK target directory):: - - sudo insmod kmod/rte_dom0_mm.ko rsv_memsize=X - -The value X cannot be greater than 4096(MB). - -Configuring Memory for DPDK Use -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -After the rte_dom0_mm.ko kernel module has been loaded, the user must configure the memory size for DPDK usage. -This is done by echoing the memory size to a memsize file in the /sys/devices/ directory. -Use the following command (assuming that 2048 MB is required):: - - echo 2048 > /sys/kernel/mm/dom0-mm/memsize-mB/memsize - -The user can also check how much memory has already been used:: - - cat /sys/kernel/mm/dom0-mm/memsize-mB/memsize_rsvd - -Xen Domain0 does not support NUMA configuration, as a result the ``--socket-mem`` command line option is invalid for Xen Domain0. - -.. note:: - - The memsize value cannot be greater than the rsv_memsize value. - -Running the DPDK Application on Xen Domain0 -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -To run the DPDK application on Xen Domain0, an extra command line option ``--xen-dom0`` is required.