LXR qemu/tests/migration/guestperf/scenario.py

   1#
   2# Migration test scenario parameter description
   3#
   4# Copyright (c) 2016 Red Hat, Inc.
   5#
   6# This library is free software; you can redistribute it and/or
   7# modify it under the terms of the GNU Lesser General Public
   8# License as published by the Free Software Foundation; either
   9# version 2.1 of the License, or (at your option) any later version.
  10#
  11# This library is distributed in the hope that it will be useful,
  12# but WITHOUT ANY WARRANTY; without even the implied warranty of
  13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14# Lesser General Public License for more details.
  15#
  16# You should have received a copy of the GNU Lesser General Public
  17# License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18#
  19
  20
  21class Scenario(object):
  22
  23    def __init__(self, name,
  24                 downtime=500,
  25                 bandwidth=125000, # 1000 gig-e, effectively unlimited
  26                 max_iters=30,
  27                 max_time=300,
  28                 pause=False, pause_iters=5,
  29                 post_copy=False, post_copy_iters=5,
  30                 auto_converge=False, auto_converge_step=10,
  31                 compression_mt=False, compression_mt_threads=1,
  32                 compression_xbzrle=False, compression_xbzrle_cache=10,
  33                 multifd=False, multifd_channels=2):
  34
  35        self._name = name
  36
  37        # General migration tunables
  38        self._downtime = downtime  # milliseconds
  39        self._bandwidth = bandwidth # MiB per second
  40        self._max_iters = max_iters
  41        self._max_time = max_time # seconds
  42
  43
  44        # Strategies for ensuring completion
  45        self._pause = pause
  46        self._pause_iters = pause_iters
  47
  48        self._post_copy = post_copy
  49        self._post_copy_iters = post_copy_iters
  50
  51        self._auto_converge = auto_converge
  52        self._auto_converge_step = auto_converge_step # percentage CPU time
  53
  54        self._compression_mt = compression_mt
  55        self._compression_mt_threads = compression_mt_threads
  56
  57        self._compression_xbzrle = compression_xbzrle
  58        self._compression_xbzrle_cache = compression_xbzrle_cache # percentage of guest RAM
  59
  60        self._multifd = multifd
  61        self._multifd_channels = multifd_channels
  62
  63    def serialize(self):
  64        return {
  65            "name": self._name,
  66            "downtime": self._downtime,
  67            "bandwidth": self._bandwidth,
  68            "max_iters": self._max_iters,
  69            "max_time": self._max_time,
  70            "pause": self._pause,
  71            "pause_iters": self._pause_iters,
  72            "post_copy": self._post_copy,
  73            "post_copy_iters": self._post_copy_iters,
  74            "auto_converge": self._auto_converge,
  75            "auto_converge_step": self._auto_converge_step,
  76            "compression_mt": self._compression_mt,
  77            "compression_mt_threads": self._compression_mt_threads,
  78            "compression_xbzrle": self._compression_xbzrle,
  79            "compression_xbzrle_cache": self._compression_xbzrle_cache,
  80            "multifd": self._multifd,
  81            "multifd_channels": self._multifd_channels,
  82        }
  83
  84    @classmethod
  85    def deserialize(cls, data):
  86        return cls(
  87            data["name"],
  88            data["downtime"],
  89            data["bandwidth"],
  90            data["max_iters"],
  91            data["max_time"],
  92            data["pause"],
  93            data["pause_iters"],
  94            data["post_copy"],
  95            data["post_copy_iters"],
  96            data["auto_converge"],
  97            data["auto_converge_step"],
  98            data["compression_mt"],
  99            data["compression_mt_threads"],
 100            data["compression_xbzrle"],
 101            data["compression_xbzrle_cache"],
 102            data["multifd"],
 103            data["multifd_channels"])
 104