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import sys
import threading
import time
from image_checksummer import ImageChecksummer
import image_chromeos
import lock_machine
from utils import command_executer
from utils import logger
CHECKSUM_FILE = "/usr/local/osimage_checksum_file"
class CrosMachine(object):
def __init__(self, name):
self.name = name
self.image = None
self.checksum = None
self.locked = False
self.released_time = time.time()
self.autotest_run = None
def __str__(self):
l = []
l.append(self.name)
l.append(str(self.image))
l.append(str(self.checksum))
l.append(str(self.locked))
l.append(str(self.released_time))
return ", ".join(l)
class MachineManager(object):
def __init__(self, chromeos_root):
self._lock = threading.RLock()
self._all_machines = []
self._machines = []
self.image_lock = threading.Lock()
self.num_reimages = 0
self.chromeos_root = None
self.no_lock = False
self.initialized = False
self.chromeos_root = chromeos_root
def ImageMachine(self, machine, chromeos_image, board=None):
checksum = ImageChecksummer().Checksum(chromeos_image)
if machine.checksum == checksum:
return
image_args = [image_chromeos.__file__,
"--chromeos_root=%s" % self.chromeos_root,
"--image=%s" % chromeos_image,
"--remote=%s" % machine.name]
if board:
image_args.append("--board=%s" % board)
# Currently can't image two machines at once.
# So have to serialized on this lock.
ce = command_executer.GetCommandExecuter()
with self.image_lock:
retval = ce.RunCommand(" ".join(["python"] + image_args))
self.num_reimages += 1
if retval:
raise Exception("Could not image machine: '%s'." % machine.name)
machine.checksum = checksum
machine.image = chromeos_image
return retval
def _TryToLockMachine(self, cros_machine):
with self._lock:
assert cros_machine, "Machine can't be None"
for m in self._machines:
assert m.name != cros_machine.name, (
"Tried to double-lock %s" % cros_machine.name)
if self.no_lock:
locked = True
else:
locked = lock_machine.Machine(cros_machine.name).Lock(True, sys.argv[0])
if locked:
self._machines.append(cros_machine)
ce = command_executer.GetCommandExecuter()
command = "cat %s" % CHECKSUM_FILE
ret, out, _ = ce.CrosRunCommand(
command, return_output=True, chromeos_root=self.chromeos_root,
machine=cros_machine.name)
if ret == 0:
cros_machine.checksum = out.strip()
else:
logger.GetLogger().LogOutput("Couldn't lock: %s" % cros_machine.name)
# This is called from single threaded mode.
def AddMachine(self, machine_name):
with self._lock:
for m in self._all_machines:
assert m.name != machine_name, "Tried to double-add %s" % machine_name
self._all_machines.append(CrosMachine(machine_name))
def AcquireMachine(self, chromeos_image):
image_checksum = ImageChecksummer().Checksum(chromeos_image)
with self._lock:
# Lazily external lock machines
if not self.initialized:
for m in self._all_machines:
self._TryToLockMachine(m)
self.initialized = True
for m in self._all_machines:
m.released_time = time.time()
if not self._machines:
machine_names = []
for machine in self._all_machines:
machine_names.append(machine.name)
raise Exception("Could not acquire any of the following machines: '%s'"
% ", ".join(machine_names))
### for m in self._machines:
### if (m.locked and time.time() - m.released_time < 10 and
### m.checksum == image_checksum):
### return None
for m in [machine for machine in self._machines if not machine.locked]:
if m.checksum == image_checksum:
m.locked = True
m.autotest_run = threading.current_thread()
return m
for m in [machine for machine in self._machines if not machine.locked]:
if not m.checksum:
m.locked = True
m.autotest_run = threading.current_thread()
return m
# This logic ensures that threads waiting on a machine will get a machine
# with a checksum equal to their image over other threads. This saves time
# when crosperf initially assigns the machines to threads by minimizing
# the number of re-images.
# TODO(asharif): If we centralize the thread-scheduler, we wont need this
# code and can implement minimal reimaging code more cleanly.
for m in [machine for machine in self._machines if not machine.locked]:
if time.time() - m.released_time > 20:
m.locked = True
m.autotest_run = threading.current_thread()
return m
return None
def GetMachines(self):
return self._all_machines
def ReleaseMachine(self, machine):
with self._lock:
for m in self._machines:
if machine.name == m.name:
assert m.locked == True, "Tried to double-release %s" % m.name
m.released_time = time.time()
m.locked = False
m.status = "Available"
break
def Cleanup(self):
with self._lock:
# Unlock all machines.
for m in self._machines:
if not self.no_lock:
res = lock_machine.Machine(m.name).Unlock(True)
if not res:
logger.GetLogger().LogError("Could not unlock machine: '%s'."
% m.name)
def __str__(self):
with self._lock:
l = ["MachineManager Status:"]
for m in self._machines:
l.append(str(m))
return "\n".join(l)
def AsString(self):
with self._lock:
stringify_fmt = "%-30s %-10s %-4s %-25s %-32s"
header = stringify_fmt % ("Machine", "Thread", "Lock", "Status",
"Checksum")
table = [header]
for m in self._machines:
if m.autotest_run:
autotest_name = m.autotest_run.name
autotest_status = m.autotest_run.status
else:
autotest_name = ""
autotest_status = ""
try:
machine_string = stringify_fmt % (m.name,
autotest_name,
m.locked,
autotest_status,
m.checksum)
except Exception:
machine_string = ""
table.append(machine_string)
return "Machine Status:\n%s" % "\n".join(table)
class MockMachineManager(object):
def __init__(self):
self.machines = []
def ImageMachine(self, machine_name, chromeos_image, board=None):
return 0
def AddMachine(self, machine_name):
self.machines.append(CrosMachine(machine_name))
def AcquireMachine(self, chromeos_image):
for machine in self.machines:
if not machine.locked:
machine.locked = True
return machine
return None
def ReleaseMachine(self, machine):
machine.locked = False
def GetMachines(self):
return self.machines
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