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qemu/tests/migration/guestperf/engine.py
Hyman Huang 22b7cb2c79 tests/migration: Introduce dirty-limit into guestperf 
Currently, guestperf does not cover the dirty-limit
migration, support this feature.

Note that dirty-limit requires 'dirty-ring-size' set.

To enable dirty-limit, setting x-vcpu-dirty-limit-period
as 500ms and x-vcpu-dirty-limit as 10MB/s:
$ ./tests/migration/guestperf.py \
    --dirty-ring-size 4096 \
    --dirty-limit --x-vcpu-dirty-limit-period 500 \
    --vcpu-dirty-limit 10 --output output.json \

To run the entire standardized set of dirty-limit-enabled
comparisons, with unix migration:
$ ./tests/migration/guestperf-batch.py \
    --dirty-ring-size 4096 \
    --dst-host localhost --transport unix \
    --filter compr-dirty-limit* --output outputdir

Signed-off-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Message-Id: <516e7a55dfc6e33d33510be37eb24223de5dc072.1697815117.git.yong.huang@smartx.com>
Message-ID: <e1283565b00b34b0377bbd27bee4bb8fc7c255a8.1698847223.git.yong.huang@smartx.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-11-03 07:48:25 +01:00

506 lines
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#
# Migration test main engine
#
# Copyright (c) 2016 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <http://www.gnu.org/licenses/>.
#
import os
import re
import sys
import time
from guestperf.progress import Progress, ProgressStats
from guestperf.report import Report
from guestperf.timings import TimingRecord, Timings
sys.path.append(os.path.join(os.path.dirname(__file__),
'..', '..', '..', 'python'))
from qemu.machine import QEMUMachine
class Engine(object):
def __init__(self, binary, dst_host, kernel, initrd, transport="tcp",
sleep=15, verbose=False, debug=False):
self._binary = binary # Path to QEMU binary
self._dst_host = dst_host # Hostname of target host
self._kernel = kernel # Path to kernel image
self._initrd = initrd # Path to stress initrd
self._transport = transport # 'unix' or 'tcp' or 'rdma'
self._sleep = sleep
self._verbose = verbose
self._debug = debug
if debug:
self._verbose = debug
def _vcpu_timing(self, pid, tid_list):
records = []
now = time.time()
jiffies_per_sec = os.sysconf(os.sysconf_names['SC_CLK_TCK'])
for tid in tid_list:
statfile = "/proc/%d/task/%d/stat" % (pid, tid)
with open(statfile, "r") as fh:
stat = fh.readline()
fields = stat.split(" ")
stime = int(fields[13])
utime = int(fields[14])
records.append(TimingRecord(tid, now, 1000 * (stime + utime) / jiffies_per_sec))
return records
def _cpu_timing(self, pid):
now = time.time()
jiffies_per_sec = os.sysconf(os.sysconf_names['SC_CLK_TCK'])
statfile = "/proc/%d/stat" % pid
with open(statfile, "r") as fh:
stat = fh.readline()
fields = stat.split(" ")
stime = int(fields[13])
utime = int(fields[14])
return TimingRecord(pid, now, 1000 * (stime + utime) / jiffies_per_sec)
def _migrate_progress(self, vm):
info = vm.cmd("query-migrate")
if "ram" not in info:
info["ram"] = {}
return Progress(
info.get("status", "active"),
ProgressStats(
info["ram"].get("transferred", 0),
info["ram"].get("remaining", 0),
info["ram"].get("total", 0),
info["ram"].get("duplicate", 0),
info["ram"].get("skipped", 0),
info["ram"].get("normal", 0),
info["ram"].get("normal-bytes", 0),
info["ram"].get("dirty-pages-rate", 0),
info["ram"].get("mbps", 0),
info["ram"].get("dirty-sync-count", 0)
),
time.time(),
info.get("total-time", 0),
info.get("downtime", 0),
info.get("expected-downtime", 0),
info.get("setup-time", 0),
info.get("cpu-throttle-percentage", 0),
info.get("dirty-limit-throttle-time-per-round", 0),
info.get("dirty-limit-ring-full-time", 0),
)
def _migrate(self, hardware, scenario, src, dst, connect_uri):
src_qemu_time = []
src_vcpu_time = []
src_pid = src.get_pid()
vcpus = src.cmd("query-cpus-fast")
src_threads = []
for vcpu in vcpus:
src_threads.append(vcpu["thread-id"])
# XXX how to get dst timings on remote host ?
if self._verbose:
print("Sleeping %d seconds for initial guest workload run" % self._sleep)
sleep_secs = self._sleep
while sleep_secs > 1:
src_qemu_time.append(self._cpu_timing(src_pid))
src_vcpu_time.extend(self._vcpu_timing(src_pid, src_threads))
time.sleep(1)
sleep_secs -= 1
if self._verbose:
print("Starting migration")
if scenario._auto_converge:
resp = src.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "auto-converge",
"state": True }
])
resp = src.cmd("migrate-set-parameters",
cpu_throttle_increment=scenario._auto_converge_step)
if scenario._post_copy:
resp = src.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "postcopy-ram",
"state": True }
])
resp = dst.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "postcopy-ram",
"state": True }
])
resp = src.cmd("migrate-set-parameters",
max_bandwidth=scenario._bandwidth * 1024 * 1024)
resp = src.cmd("migrate-set-parameters",
downtime_limit=scenario._downtime)
if scenario._compression_mt:
resp = src.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "compress",
"state": True }
])
resp = src.cmd("migrate-set-parameters",
compress_threads=scenario._compression_mt_threads)
resp = dst.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "compress",
"state": True }
])
resp = dst.cmd("migrate-set-parameters",
decompress_threads=scenario._compression_mt_threads)
if scenario._compression_xbzrle:
resp = src.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "xbzrle",
"state": True }
])
resp = dst.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "xbzrle",
"state": True }
])
resp = src.cmd("migrate-set-parameters",
xbzrle_cache_size=(
hardware._mem *
1024 * 1024 * 1024 / 100 *
scenario._compression_xbzrle_cache))
if scenario._multifd:
resp = src.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "multifd",
"state": True }
])
resp = src.cmd("migrate-set-parameters",
multifd_channels=scenario._multifd_channels)
resp = dst.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "multifd",
"state": True }
])
resp = dst.cmd("migrate-set-parameters",
multifd_channels=scenario._multifd_channels)
if scenario._dirty_limit:
if not hardware._dirty_ring_size:
raise Exception("dirty ring size must be configured when "
"testing dirty limit migration")
resp = src.cmd("migrate-set-capabilities",
capabilities = [
{ "capability": "dirty-limit",
"state": True }
])
resp = src.cmd("migrate-set-parameters",
x_vcpu_dirty_limit_period=scenario._x_vcpu_dirty_limit_period)
resp = src.cmd("migrate-set-parameters",
vcpu_dirty_limit=scenario._vcpu_dirty_limit)
resp = src.cmd("migrate", uri=connect_uri)
post_copy = False
paused = False
progress_history = []
start = time.time()
loop = 0
while True:
loop = loop + 1
time.sleep(0.05)
progress = self._migrate_progress(src)
if (loop % 20) == 0:
src_qemu_time.append(self._cpu_timing(src_pid))
src_vcpu_time.extend(self._vcpu_timing(src_pid, src_threads))
if (len(progress_history) == 0 or
(progress_history[-1]._ram._iterations <
progress._ram._iterations)):
progress_history.append(progress)
if progress._status in ("completed", "failed", "cancelled"):
if progress._status == "completed" and paused:
dst.cmd("cont")
if progress_history[-1] != progress:
progress_history.append(progress)
if progress._status == "completed":
if self._verbose:
print("Sleeping %d seconds for final guest workload run" % self._sleep)
sleep_secs = self._sleep
while sleep_secs > 1:
time.sleep(1)
src_qemu_time.append(self._cpu_timing(src_pid))
src_vcpu_time.extend(self._vcpu_timing(src_pid, src_threads))
sleep_secs -= 1
return [progress_history, src_qemu_time, src_vcpu_time]
if self._verbose and (loop % 20) == 0:
print("Iter %d: remain %5dMB of %5dMB (total %5dMB @ %5dMb/sec)" % (
progress._ram._iterations,
progress._ram._remaining_bytes / (1024 * 1024),
progress._ram._total_bytes / (1024 * 1024),
progress._ram._transferred_bytes / (1024 * 1024),
progress._ram._transfer_rate_mbs,
))
if progress._ram._iterations > scenario._max_iters:
if self._verbose:
print("No completion after %d iterations over RAM" % scenario._max_iters)
src.cmd("migrate_cancel")
continue
if time.time() > (start + scenario._max_time):
if self._verbose:
print("No completion after %d seconds" % scenario._max_time)
src.cmd("migrate_cancel")
continue
if (scenario._post_copy and
progress._ram._iterations >= scenario._post_copy_iters and
not post_copy):
if self._verbose:
print("Switching to post-copy after %d iterations" % scenario._post_copy_iters)
resp = src.cmd("migrate-start-postcopy")
post_copy = True
if (scenario._pause and
progress._ram._iterations >= scenario._pause_iters and
not paused):
if self._verbose:
print("Pausing VM after %d iterations" % scenario._pause_iters)
resp = src.cmd("stop")
paused = True
def _is_ppc64le(self):
_, _, _, _, machine = os.uname()
if machine == "ppc64le":
return True
return False
def _get_guest_console_args(self):
if self._is_ppc64le():
return "console=hvc0"
else:
return "console=ttyS0"
def _get_qemu_serial_args(self):
if self._is_ppc64le():
return ["-chardev", "stdio,id=cdev0",
"-device", "spapr-vty,chardev=cdev0"]
else:
return ["-chardev", "stdio,id=cdev0",
"-device", "isa-serial,chardev=cdev0"]
def _get_common_args(self, hardware, tunnelled=False):
args = [
"noapic",
"edd=off",
"printk.time=1",
"noreplace-smp",
"cgroup_disable=memory",
"pci=noearly",
]
args.append(self._get_guest_console_args())
if self._debug:
args.append("debug")
else:
args.append("quiet")
args.append("ramsize=%s" % hardware._mem)
cmdline = " ".join(args)
if tunnelled:
cmdline = "'" + cmdline + "'"
argv = [
"-cpu", "host",
"-kernel", self._kernel,
"-initrd", self._initrd,
"-append", cmdline,
"-m", str((hardware._mem * 1024) + 512),
"-smp", str(hardware._cpus),
]
if hardware._dirty_ring_size:
argv.extend(["-accel", "kvm,dirty-ring-size=%s" %
hardware._dirty_ring_size])
else:
argv.extend(["-accel", "kvm"])
argv.extend(self._get_qemu_serial_args())
if self._debug:
argv.extend(["-machine", "graphics=off"])
if hardware._prealloc_pages:
argv_source += ["-mem-path", "/dev/shm",
"-mem-prealloc"]
if hardware._locked_pages:
argv_source += ["-overcommit", "mem-lock=on"]
if hardware._huge_pages:
pass
return argv
def _get_src_args(self, hardware):
return self._get_common_args(hardware)
def _get_dst_args(self, hardware, uri):
tunnelled = False
if self._dst_host != "localhost":
tunnelled = True
argv = self._get_common_args(hardware, tunnelled)
return argv + ["-incoming", uri]
@staticmethod
def _get_common_wrapper(cpu_bind, mem_bind):
wrapper = []
if len(cpu_bind) > 0 or len(mem_bind) > 0:
wrapper.append("numactl")
if cpu_bind:
wrapper.append("--physcpubind=%s" % ",".join(cpu_bind))
if mem_bind:
wrapper.append("--membind=%s" % ",".join(mem_bind))
return wrapper
def _get_src_wrapper(self, hardware):
return self._get_common_wrapper(hardware._src_cpu_bind, hardware._src_mem_bind)
def _get_dst_wrapper(self, hardware):
wrapper = self._get_common_wrapper(hardware._dst_cpu_bind, hardware._dst_mem_bind)
if self._dst_host != "localhost":
return ["ssh",
"-R", "9001:localhost:9001",
self._dst_host] + wrapper
else:
return wrapper
def _get_timings(self, vm):
log = vm.get_log()
if not log:
return []
if self._debug:
print(log)
regex = r"[^\s]+\s\((\d+)\):\sINFO:\s(\d+)ms\scopied\s\d+\sGB\sin\s(\d+)ms"
matcher = re.compile(regex)
records = []
for line in log.split("\n"):
match = matcher.match(line)
if match:
records.append(TimingRecord(int(match.group(1)),
int(match.group(2)) / 1000.0,
int(match.group(3))))
return records
def run(self, hardware, scenario, result_dir=os.getcwd()):
abs_result_dir = os.path.join(result_dir, scenario._name)
if self._transport == "tcp":
uri = "tcp:%s:9000" % self._dst_host
elif self._transport == "rdma":
uri = "rdma:%s:9000" % self._dst_host
elif self._transport == "unix":
if self._dst_host != "localhost":
raise Exception("Running use unix migration transport for non-local host")
uri = "unix:/var/tmp/qemu-migrate-%d.migrate" % os.getpid()
try:
os.remove(uri[5:])
os.remove(monaddr)
except:
pass
if self._dst_host != "localhost":
dstmonaddr = ("localhost", 9001)
else:
dstmonaddr = "/var/tmp/qemu-dst-%d-monitor.sock" % os.getpid()
srcmonaddr = "/var/tmp/qemu-src-%d-monitor.sock" % os.getpid()
src = QEMUMachine(self._binary,
args=self._get_src_args(hardware),
wrapper=self._get_src_wrapper(hardware),
name="qemu-src-%d" % os.getpid(),
monitor_address=srcmonaddr)
dst = QEMUMachine(self._binary,
args=self._get_dst_args(hardware, uri),
wrapper=self._get_dst_wrapper(hardware),
name="qemu-dst-%d" % os.getpid(),
monitor_address=dstmonaddr)
try:
src.launch()
dst.launch()
ret = self._migrate(hardware, scenario, src, dst, uri)
progress_history = ret[0]
qemu_timings = ret[1]
vcpu_timings = ret[2]
if uri[0:5] == "unix:" and os.path.exists(uri[5:]):
os.remove(uri[5:])
if os.path.exists(srcmonaddr):
os.remove(srcmonaddr)
if self._dst_host == "localhost" and os.path.exists(dstmonaddr):
os.remove(dstmonaddr)
if self._verbose:
print("Finished migration")
src.shutdown()
dst.shutdown()
return Report(hardware, scenario, progress_history,
Timings(self._get_timings(src) + self._get_timings(dst)),
Timings(qemu_timings),
Timings(vcpu_timings),
self._binary, self._dst_host, self._kernel,
self._initrd, self._transport, self._sleep)
except Exception as e:
if self._debug:
print("Failed: %s" % str(e))
try:
src.shutdown()
except:
pass
try:
dst.shutdown()
except:
pass
if self._debug:
print(src.get_log())
print(dst.get_log())
raise
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