Vector Packet Processing (VPP)
Contents
purpose
quote from What is VPP:
As the name implies, VPP uses vector processing as opposed to scalar processing. Scalar packet processing refers to the processing of one packet at a time. That older, traditional approach entails processing an interrupt, and traversing the call stack (a calls b calls c... return return return from the nested calls... then return from Interrupt). That process then does one of 3 things: punt, drop, or rewrite/forward the packet. By contrast, vector processing processes more than one packet at a time. One of the benefits of the vector approach is that it fixes the I-cache thrashing problem. It also mitigates the dependent read latency problem (pre-fetching eliminates the latency).
vpp in a FreeBSD virtual machine (VM)
I am using the bash shell
[root@vpp1fbsd ~]# echo $SHELL /usr/local/bin/bash
- requirements
[root@vpp1fbsd ~]# pkg install gmake sudo git bash
- fetch/build/install
[root@vpp1fbsd ~]# mkdir vpp_proj [root@vpp1fbsd ~]# cd vpp_proj/ [root@vpp1fbsd ~/vpp_proj]# ls [root@vpp1fbsd ~/vpp_proj]# git clone https://github.com/FDio/vpp.git vpp.git Cloning into 'vpp.git'... remote: Enumerating objects: 151852, done. remote: Counting objects: 100% (165/165), done. remote: Compressing objects: 100% (128/128), done. remote: Total 151852 (delta 109), reused 37 (delta 37), pack-reused 151687 (from 6) Receiving objects: 100% (151852/151852), 108.37 MiB | 49.65 MiB/s, done. Resolving deltas: 100% (121554/121554), done. [root@vpp1fbsd ~/vpp_proj]# ls vpp.git [root@vpp1fbsd ~/vpp_proj/vpp.git]# gmake install-dep > ../install-dep.log [root@vpp1fbsd ~/vpp_proj/vpp.git]# gmake build > ../build.log
Running VPP with DPDK
- install the DPDK package:
[root@vpp1fbsd ~/vpp_proj/vpp.git]# pkg install net/dpdk
[root@vpp1fbsd ~/vpp_proj/vpp.git]# pciconf -lv | rg "virtio_pci"
virtio_pci0@pci0:0:5:0: class=0x020000 rev=0x00 hdr=0x00 vendor=0x1af4 device=0x1000 subvendor=0x1af4 subdevice=0x0001
virtio_pci1@pci0:0:5:1: class=0x020000 rev=0x00 hdr=0x00 vendor=0x1af4 device=0x1000 subvendor=0x1af4 subdevice=0x0001 <<< map this virtual network device to dpdk { dev 0000:00:05.1 }
[root@vpp1fbsd ~/vpp_proj/vpp.git]#
[root@vpp1fbsd ~/vpp_proj/vpp.git]# cd ..
[root@vpp1fbsd ~/vpp_proj]# chmod +x load_vpp_dependencies.sh
[root@vpp1fbsd ~/vpp_proj]# cat load_vpp_dependencies.sh
#!/bin/sh
modroot="/boot/modules"
kenv hw.contigmem.num_buffers=8
kenv hw.contigmem.buffer_size=16777216
kenv hw.nic_uio.bdfs="0:5:1"
kldload contigmem.ko
kldload nic_uio.ko
[root@vpp1fbsd ~/vpp_proj]# ./load_vpp_dependencies.sh
hw.contigmem.num_buffers="8"
hw.contigmem.buffer_size="16777216"
hw.nic_uio.bdfs="0:5:1"
[root@vpp1fbsd ~/vpp_proj]#a startup.conf file (file location in default is the root repository of the git repository) is required for the vpp to run using gmake run
[root@vpp1fbsd ~/vpp_proj/vpp.git]# cat startup.conf
unix {
interactive
cli-listen /run/vpp/cli.sock
gid $(id -g)
}
dpdk {
dev 0000:00:05.1
}
## or setup the `STARTUP_CONF` environment variable
[root@vpp1fbsd ~/vpp_proj]# readlink -f startup.conf
/root/vpp_proj/startup.conf
[root@vpp1fbsd ~/vpp_proj]# cd $HOME
[root@vpp1fbsd ~]# export STARTUP_CONF="$HOME/vpp_proj/startup.conf"
[root@vpp1fbsd ~]# echo $STARTUP_CONF
/root/vpp_proj/startup.conf
[root@vpp1fbsd ~]#
[root@vpp1fbsd ~/vpp_proj/vpp.git]# gmake run
tls_init_ca_chain:1145: Could not initialize TLS CA certificates
tls_openssl_init:1263: failed to initialize TLS CA chain
vat-plug/load [error ]: vat_plugin_register: idpf plugin not loaded...
vat-plug/load [error ]: vat_plugin_register: oddbuf plugin not loaded...
_______ _ _ _____ ___
__/ __/ _ \ (_)__ | | / / _ \/ _ \
_/ _// // / / / _ \ | |/ / ___/ ___/
/_/ /____(_)_/\___/ |___/_/ /_/
DBGvpp#
DBGvpp# show interface
Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count
GigabitEthernet0/5/1 1 down 9000/0/0/0
local0 0 down 0/0/0/0
DBGvpp#
DBGvpp# set interface state GigabitEthernet0/5/1 up
DBGvpp# show interface addr GigabitEthernet0/5/1
GigabitEthernet0/5/1 (up):
DBGvpp# set dhcp client intfc GigabitEthernet0/5/1
DBGvpp#
DBGvpp# vl_msg_api_alloc_internal:123: garbage collect pool 0 ring 0 index 0
vl_msg_api_alloc_internal:129: msg id 0 name (nil)
interface [error ]: hw_add_del_mac_address: dpdk_add_del_mac_address: mac address add/del failed: -1
interface [error ]: hw_add_del_mac_address: dpdk_add_del_mac_address: mac address add/del failed: -1
DBGvpp# show interface addr GigabitEthernet0/5/1 << this command will show the ip address
DBGvpp# show hardware-interfaces GigabitEthernet0/5/1 << this command will show the Ethernet mac address
DBGvpp#
problems during build
problem of missing rdma-core_version
[root@vpp1fbsd ~/vpp_proj/vpp.git]# gmake build > ../build.log packages/dpdk.mk:39: *** Missing rdma-core_version. Stop. gmake[1]: *** [Makefile:739: external-install] Error 2 gmake: *** [Makefile:498: build] Error 2
The current solution for FreeBSD is to comment out that line:
[root@vpp1fbsd ~/vpp_proj/vpp.git]# git diff diff --git a/build/external/packages/dpdk.mk b/build/external/packages/dpdk.mk index da6802e48..19e445531 100644 --- a/build/external/packages/dpdk.mk +++ b/build/external/packages/dpdk.mk @@ -36,7 +36,7 @@ else dpdk_depends := rdma-core $(if $(ARCH_X86_64), ipsec-mb) endif ifeq ($(rdma-core_version),) -$(error Missing rdma-core_version) +#$(error Missing rdma-core_version) endif DPDK_MLX_DEFAULT := $(shell if grep -q "rdma=$(rdma-core_version) dpdk=$(dpdk_version)" mlx_rdma_dpdk_matrix.txt; then echo 'y'; else echo 'n'; fi) DPDK_MLX4_PMD ?= $(DPDK_MLX_DEFAULT) [root@vpp1fbsd ~/vpp_proj/vpp.git]#
problems during installation
- DPDK required kernel modules
Required by DPDK, if these contigmem and nic_uio kernel modules cannot be loaded, try recompile the GENERIC kernel from source or recompile the DPDK from the ports tree: net/dpdk
root@n1fbsd:~/VPP_project # kldstat Id Refs Address Size Name 1 1 0xffffffff80200000 28635c0 kernel root@n1fbsd:~/VPP_project # kldload contigmem kldload: can't load contigmem: module already loaded or in kernel root@n1fbsd:~/VPP_project # kldload nic_uio kldload: can't load nic_uio: module already loaded or in kernel root@n1fbsd:~/VPP_project # kldload /boot/modules/contigmem.ko kldload: can't load /boot/modules/contigmem.ko: module already loaded or in kernel root@n1fbsd:~/VPP_project # kldload /boot/modules/nic_uio.ko kldload: can't load /boot/modules/nic_uio.ko: module already loaded or in kernel