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https://github.com/openvswitch/ovs
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63 lines
2.3 KiB
Plaintext
63 lines
2.3 KiB
Plaintext
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openvswitch-switch-dpdk
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-----------------------
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This package provides a DPDK enabled version of the OpenvSwitch vswitchd
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binary; by default, the ovs-vswitchd binary from openvswitch-switch will
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be used:
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$ update-alternatives --query ovs-vswitchd
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Name: ovs-vswitchd
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Link: /usr/sbin/ovs-vswitchd
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Status: auto
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Best: /usr/lib/openvswitch-switch/ovs-vswitchd
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Value: /usr/lib/openvswitch-switch/ovs-vswitchd
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Alternative: /usr/lib/openvswitch-switch-dpdk/ovs-vswitchd-dpdk
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Priority: 50
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Alternative: /usr/lib/openvswitch-switch/ovs-vswitchd
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Priority: 100
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DPDK provides fast packet processing in userspace, and has some specific
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requirements in terms of system configuration.
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DPDK has a minimum CPU feature set of SSE3, so is not appropriate for all
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amd64 CPU types hence is not enabled by default.
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To switch to the DPDK version:
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sudo update-alternatives --set ovs-vswitchd \
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/usr/lib/openvswitch-switch-dpdk/ovs-vswitchd-dpdk
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sudo service openvswitch-switch restart
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and to switch back:
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sudo update-alternatives --set ovs-vswitchd \
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/usr/lib/openvswitch-switch/ovs-vswitchd
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sudo service openvswitch-switch restart
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-- James Page <james.page@ubuntu.com> Tue, 21 Jul 2015 12:06:49 +0100
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Since Open vSwitch >= 2.6 the configuration of DPDK features has changed.
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Instead of providing DPDK_OPTS in /etc/default/openvswitch-switch one now has
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to use ovs-vsctl to enter the config into the database.
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An example basic configuration workflow might look like:
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# Enable DPDK
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$ ovs-vsctl set Open_vSwitch . "other_config:dpdk-init=true"
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# run on cores 3,4 8,9
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$ ovs-vsctl set Open_vSwitch . "other_config:dpdk-lcore-mask=0x318"
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# Allocate 2G huge pages (not Numa node aware)
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$ ovs-vsctl set Open_vSwitch . "other_config:dpdk-alloc-mem=2048"
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# group/permissions for vhost-user sockets (required to work with libvirt/qemu)
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$ ovs-vsctl set Open_vSwitch . \
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"other_config:dpdk-extra=--vhost-owner libvirt-qemu:kvm --vhost-perm 0666"
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There are also tunables like:
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$ ovs-vsctl set Open_vSwitch . "other_config:pmd-cpu-mask=0x318"
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$ ovs-vsctl set Open_vSwitch . "other_config:n-dpdk-rxqs=4"
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Any of those changes require openvswitch to be restarted to take effect.
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-- Christian Ehrhardt <christian.ehrhardt@canonical.com> Tue, 04 Oct 2016 11:17:12 +0200
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