vnfs/qemu/qemu_dpdk.py

   1 # Copyright 2015 Intel Corporation.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #   http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 """Automation of QEMU hypervisor for launching vhost-cuse enabled guests.
  16 """
  17
  18 from vnfs.qemu.qemu import IVnfQemu
  19 from conf import settings as S
  20
  21 class IVnfQemuDpdk(IVnfQemu):
  22     """
  23     An abstract class for controling an instance of QEMU with DPDK vHost support
  24     """
  25
  26     def __init__(self):
  27         """
  28         Initialisation function.
  29         """
  30         super(IVnfQemuDpdk, self).__init__()
  31         self._cmd += ['-drive',
  32                       'if=scsi,file=fat:rw:%s,snapshot=off' %
  33                       S.getValue('GUEST_SHARE_DIR')[self._number],
  34                      ]
  35
  36     def _modify_dpdk_makefile(self):
  37         """
  38         Modifies DPDK makefile in Guest before compilation
  39         """
  40         pass
  41
  42     def _config_guest_loopback(self):
  43         """
  44         Configure VM to run testpmd
  45
  46         Configure performs the following:
  47         * Mount hugepages
  48         * mount shared directory for copying DPDK
  49         * Disable firewall
  50         * Compile DPDK
  51         * DPDK NIC bind
  52         * Run testpmd
  53         """
  54
  55         # Guest images _should_ have 1024 hugepages by default,
  56         # but just in case:'''
  57         self.execute_and_wait('sysctl vm.nr_hugepages=1024')
  58
  59         # Mount hugepages
  60         self.execute_and_wait('mkdir -p /dev/hugepages')
  61         self.execute_and_wait(
  62             'mount -t hugetlbfs hugetlbfs /dev/hugepages')
  63
  64         # mount shared directory
  65         self.execute_and_wait('umount ' + S.getValue('OVS_DPDK_SHARE'))
  66         self.execute_and_wait('rm -rf ' + S.getValue('GUEST_OVS_DPDK_DIR'))
  67         self.execute_and_wait('mkdir -p ' + S.getValue('OVS_DPDK_SHARE'))
  68         self.execute_and_wait('mount -o iocharset=utf8 /dev/sdb1 ' +
  69                               S.getValue('OVS_DPDK_SHARE'))
  70         self.execute_and_wait('mkdir -p ' + S.getValue('GUEST_OVS_DPDK_DIR'))
  71         self.execute_and_wait('cp -a ' + S.getValue('OVS_DPDK_SHARE') + '/* ' +
  72                               S.getValue('GUEST_OVS_DPDK_DIR'))
  73         # Get VM info
  74         self.execute_and_wait('cat /etc/default/grub')
  75
  76         # Disable services (F16)
  77         self.execute_and_wait('systemctl status iptables.service')
  78         self.execute_and_wait('systemctl stop iptables.service')
  79
  80         # build and configure system for dpdk
  81         self.execute_and_wait('cd ' + S.getValue('GUEST_OVS_DPDK_DIR') +
  82                               '/DPDK')
  83         self.execute_and_wait('export CC=gcc')
  84         self.execute_and_wait('export RTE_SDK=' +
  85                               S.getValue('GUEST_OVS_DPDK_DIR') + '/DPDK')
  86         self.execute_and_wait('export RTE_TARGET=%s' % S.getValue('RTE_TARGET'))
  87
  88         # modify makefile if needed
  89         self._modify_dpdk_makefile()
  90
  91         self.execute_and_wait('make RTE_OUTPUT=$RTE_SDK/$RTE_TARGET -C '
  92                               '$RTE_SDK/lib/librte_eal/linuxapp/igb_uio')
  93         self.execute_and_wait('modprobe uio')
  94         self.execute_and_wait('insmod %s/kmod/igb_uio.ko' %
  95                               S.getValue('RTE_TARGET'))
  96         self.execute_and_wait('./tools/dpdk_nic_bind.py --status')
  97         self.execute_and_wait(
  98             './tools/dpdk_nic_bind.py -b igb_uio' ' ' +
  99             S.getValue('GUEST_NET1_PCI_ADDRESS')[self._number] + ' ' +
 100             S.getValue('GUEST_NET2_PCI_ADDRESS')[self._number])
 101
 102         # build and run 'test-pmd'
 103         self.execute_and_wait('cd ' + S.getValue('GUEST_OVS_DPDK_DIR') +
 104                               '/DPDK/app/test-pmd')
 105         self.execute_and_wait('make clean')
 106         self.execute_and_wait('make')
 107         self.execute_and_wait('./testpmd -c 0x3 -n 4 --socket-mem 512 --'
 108                               ' --burst=64 -i --txqflags=0xf00 ' +
 109                               '--disable-hw-vlan', 60, "Done")
 110         self.execute('set fwd mac_retry', 1)
 111         self.execute_and_wait('start', 20,
 112                               'TX RS bit threshold=0 - TXQ flags=0xf00')