Public bug reported:
OS: Ubuntu 17.10 , update to latest version
Hardware : ThunderX 2S System (Gigabyte R150)
Reproduce procedure
====
DPDKDEV1=0006:01:00.1
DPDKDEV2=0006:01:00.2
dpdk-devbind -b vfio-pci $DPDKDEV1
dpdk-devbind -b vfio-pci $DPDKDEV2
sysctl -w vm.nr_hugepages=24
umount /dev/hugepages
mount -t hugetlbfs none /dev/hugepages
grep HugePages_ /proc/meminfo
pkill ovs
sleep 5
rm -rf /etc/openvswitch/*
rm -rf /var/run/openvswitch/*
rm -rf /var/log/openvswitch/*
ovsdb-tool create /etc/openvswitch/conf.db
/usr/share/openvswitch/vswitch.ovsschema
ovsdb-server --remote=punix:/var/run/openvswitch/db.sock
--remote=db:Open_vSwitch,Open_vSwitch,manager_options
--private-key=db:Open_vSwitch,SSL,private_key
--certificate=db:Open_vSwitch,SSL,certificate
--bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert --pidfile --detach
--log-file
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true
ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-socket-mem="1024,1024"
ovs-vsctl --no-wait init
TXQ=2 ovs-vswitchd --pidfile --detach --log-file
ovs-vsctl del-br br0
ovs-vsctl --log-file=/var/log/openvswitch/ovs-ctl.log add-br br0 -- set bridge
br0 datapath_type=netdev
ovs-vsctl add-port br0 dpdk0 -- set Interface dpdk0 type=dpdk
options:dpdk-devargs=${DPDKDEV1}
ovs-vsctl add-port br0 dpdk1 -- set Interface dpdk1 type=dpdk
options:dpdk-devargs=${DPDKDEV2}
ovs-ofctl add-flow br0 in_port=1,action=output:2
ovs-ofctl add-flow br0 in_port=2,action=output:1
ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=0x6
ovs-vsctl set Interface dpdk0 options:n_rxq=2
ovs-vsctl set Interface dpdk1 options:n_rxq=2
====
if replace pmd-cpu-mask=0x6 with more than 6 CPU like pmd-cpu-mask=0xFF0,
this command will stop work.
but it less than 6 or equal than 6, it works fine .
** Affects: dpdk (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1719387
Title:
DPDK with OVS cannot allocate more than 6 CPU
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