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# Copyright 2015 Intel Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Automation of QEMU hypervisor for launching vhost-cuse enabled guests.
"""
from vnfs.qemu.qemu import IVnfQemu
from conf import settings as S
class IVnfQemuDpdk(IVnfQemu):
"""
An abstract class for controling an instance of QEMU with DPDK vHost support
"""
def __init__(self):
"""
:param timeout: Time to wait for login prompt. If set to
0 do not wait.
:param number: Number of QEMU instance, used when multiple QEMU
instances are started at once.
:param args: Arguments to pass to QEMU.
:returns: None
"""
super(IVnfQemuDpdk, self).__init__()
self._cmd += []
def _modify_dpdk_makefile(self):
"""
Modifies DPDK makefile in Guest before compilation
"""
pass
def _config_guest_loopback(self):
"""
Configure VM to run testpmd
Configure performs the following:
* Mount hugepages
* mount shared directory for copying DPDK
* Disable firewall
* Compile DPDK
* DPDK NIC bind
* Run testpmd
"""
# Guest images _should_ have 1024 hugepages by default,
# but just in case:'''
self.execute_and_wait('sysctl vm.nr_hugepages=1024')
# Mount hugepages
self.execute_and_wait('mkdir -p /dev/hugepages')
self.execute_and_wait(
'mount -t hugetlbfs hugetlbfs /dev/hugepages')
# mount shared directory
self.execute_and_wait('umount ' + S.getValue('OVS_DPDK_SHARE'))
self.execute_and_wait('rm -rf ' + S.getValue('GUEST_OVS_DPDK_DIR'))
self.execute_and_wait('mkdir -p ' + S.getValue('OVS_DPDK_SHARE'))
self.execute_and_wait('mount -o iocharset=utf8 /dev/sdb1 ' +
S.getValue('OVS_DPDK_SHARE'))
self.execute_and_wait('mkdir -p ' + S.getValue('GUEST_OVS_DPDK_DIR'))
self.execute_and_wait('cp -a ' + S.getValue('OVS_DPDK_SHARE') + '/* ' +
S.getValue('GUEST_OVS_DPDK_DIR'))
# Get VM info
self.execute_and_wait('cat /etc/default/grub')
# Disable services (F16)
self.execute_and_wait('systemctl status iptables.service')
self.execute_and_wait('systemctl stop iptables.service')
# build and configure system for dpdk
self.execute_and_wait('cd ' + S.getValue('GUEST_OVS_DPDK_DIR') +
'/DPDK')
self.execute_and_wait('export CC=gcc')
self.execute_and_wait('export RTE_SDK=' +
S.getValue('GUEST_OVS_DPDK_DIR') + '/DPDK')
self.execute_and_wait('export RTE_TARGET=%s' % S.getValue('RTE_TARGET'))
# modify makefile if needed
self._modify_dpdk_makefile()
self.execute_and_wait('make RTE_OUTPUT=$RTE_SDK/$RTE_TARGET -C '
'$RTE_SDK/lib/librte_eal/linuxapp/igb_uio')
self.execute_and_wait('modprobe uio')
self.execute_and_wait('insmod %s/kmod/igb_uio.ko' %
S.getValue('RTE_TARGET'))
self.execute_and_wait('./tools/dpdk_nic_bind.py --status')
self.execute_and_wait(
'./tools/dpdk_nic_bind.py -b igb_uio' ' ' +
S.getValue('GUEST_NET1_PCI_ADDRESS')[self._number] + ' ' +
S.getValue('GUEST_NET2_PCI_ADDRESS')[self._number])
# build and run 'test-pmd'
self.execute_and_wait('cd ' + S.getValue('GUEST_OVS_DPDK_DIR') +
'/DPDK/app/test-pmd')
self.execute_and_wait('make clean')
self.execute_and_wait('make')
self.execute_and_wait('./testpmd -c 0x3 -n 4 --socket-mem 512 --'
' --burst=64 -i --txqflags=0xf00 ' +
'--disable-hw-vlan', 60, "Done")
self.execute('set fwd mac_retry', 1)
self.execute_and_wait('start', 20,
'TX RS bit threshold=0 - TXQ flags=0xf00')
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