【dpdk】Getting Started Guide for Linux DPDK

Getting Started Guide for Linux — Data Plane Development Kit 23.11.0 documentation (dpdk.org)

DPDK官网

1.dpdk build with isa-l

ISA-L Compression Poll Mode Driver

2.System Requirements

System Requirements

1.启用iommu

ubuntu
cat /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash, intel_iommu=on"

grub-mkconfig --output=/boot/grub/grub.cfg

3.Running DPDK Applications

The reservation of hugepages can be performed at run time. This is done by echoing the number of hugepages required to a nr_hugepages file in the /sys/kernel/ directory corresponding to a specific page size (in Kilobytes). For a single-node system, the command to use is as follows (assuming that 1024 of 2MB pages are required):

echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages

On a NUMA machine, the above command will usually divide the number of hugepages equally across all NUMA nodes (assuming there is enough memory on all NUMA nodes). However, pages can also be reserved explicitly on individual NUMA nodes using a nr_hugepages file in the /sys/devices/ directory:

echo 1024 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages
echo 1024 > /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages

The tool dpdk-hugepages.py can be used to manage hugepages.

3.1. dpdk-hugepages Application

The dpdk-hugepages tool is a Data Plane Development Kit (DPDK) utility that helps in reserving hugepages. As well as checking for current settings.

3.1.1. Running the Application

The tool has a number of command line options:

dpdk-hugepages [options]

3.1.2. Options

• -h, --help

  Display usage information and quit

• -s, --show

  Print the current huge page configuration

• -c driver, --clear

  Clear existing huge page reservation

• -m, --mount

  Mount the huge page filesystem

• -u, --unmount

  Unmount the huge page filesystem

• -n NODE, --node=NODE

  Set NUMA node to reserve pages on

• -p SIZE, --pagesize=SIZE

  • Select hugepage size to use.

    If not specified the default system huge page size is used.

• -r SIZE, --reserve=SIZE

  • Reserve huge pages.

    Size is in bytes with K, M or G suffix.

• --setup SIZE

  Short cut to clear, unmount, reserve and mount.

Warning

While any user can run the dpdk-hugepages.py script to view the status of huge pages, modifying the setup requires root privileges.

3.1.3. Examples

To display current huge