diff options
Diffstat (limited to 'doc/guides/linux_gsg')
| -rw-r--r-- | doc/guides/linux_gsg/linux_drivers.rst | 7 | ||||
| -rw-r--r-- | doc/guides/linux_gsg/sys_reqs.rst | 19 |
2 files changed, 19 insertions, 7 deletions
diff --git a/doc/guides/linux_gsg/linux_drivers.rst b/doc/guides/linux_gsg/linux_drivers.rst index 371a817f..8da6a31b 100644 --- a/doc/guides/linux_gsg/linux_drivers.rst +++ b/doc/guides/linux_gsg/linux_drivers.rst @@ -48,6 +48,13 @@ be loaded as shown below: ``vfio-pci`` kernel module rather than ``igb_uio`` or ``uio_pci_generic``. For more details see :ref:`linux_gsg_binding_kernel` below. +.. note:: + + If the devices used for DPDK are bound to the ``uio_pci_generic`` kernel module, + please make sure that the IOMMU is disabled or passthrough. One can add + ``intel_iommu=off`` or ``amd_iommu=off`` or ``intel_iommu=on iommu=pt``in GRUB + command line on x86_64 systems, or add ``iommu.passthrough=1`` on arm64 system. + Since DPDK release 1.7 onward provides VFIO support, use of UIO is optional for platforms that support using VFIO. diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst index e2230f37..29c5f47a 100644 --- a/doc/guides/linux_gsg/sys_reqs.rst +++ b/doc/guides/linux_gsg/sys_reqs.rst @@ -64,7 +64,11 @@ 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+. -* libnuma-devel - library for handling NUMA (Non Uniform Memory Access). +* Library for handling NUMA (Non Uniform Memory Access). + + * numactl-devel in Red Hat/Fedora; + + * libnuma-dev in Debian/Ubuntu; * Python, version 2.7+ or 3.2+, to use various helper scripts included in the DPDK package. @@ -103,6 +107,13 @@ System Software uname -r +.. note:: + + Kernel version 3.2 is no longer a kernel.org longterm stable kernel. + For DPDK 19.02 the minimum required kernel will be updated to + the current kernel.org oldest longterm stable supported kernel 3.16, + or recent versions of common distributions, notably RHEL/CentOS 7. + * glibc >= 2.7 (for features related to cpuset) The version can be checked using the ``ldd --version`` command. @@ -183,12 +194,6 @@ On a NUMA machine, pages should be allocated explicitly on separate nodes:: For 1G pages, it is not possible to reserve the hugepage memory after the system has booted. - On IBM POWER system, the nr_overcommit_hugepages should be set to the same value as nr_hugepages. - For example, if the required page number is 128, the following commands are used:: - - echo 128 > /sys/kernel/mm/hugepages/hugepages-16384kB/nr_hugepages - echo 128 > /sys/kernel/mm/hugepages/hugepages-16384kB/nr_overcommit_hugepages - Using Hugepages with the DPDK ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |