mirror of https://github.com/m-labs/artiq.git
265 lines
9.1 KiB
Python
265 lines
9.1 KiB
Python
import sys
|
|
import asyncio
|
|
import logging
|
|
import subprocess
|
|
import traceback
|
|
import time
|
|
from functools import partial
|
|
|
|
from artiq.protocols import pyon
|
|
from artiq.tools import (asyncio_process_wait_timeout, asyncio_process_wait,
|
|
asyncio_wait_or_cancel)
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class WorkerTimeout(Exception):
|
|
pass
|
|
|
|
|
|
class WorkerWatchdogTimeout(Exception):
|
|
pass
|
|
|
|
|
|
class WorkerError(Exception):
|
|
pass
|
|
|
|
|
|
class Worker:
|
|
def __init__(self, handlers=dict(), send_timeout=0.5):
|
|
self.handlers = handlers
|
|
self.send_timeout = send_timeout
|
|
|
|
self.rid = None
|
|
self.process = None
|
|
self.watchdogs = dict() # wid -> expiration (using time.monotonic)
|
|
|
|
self.io_lock = asyncio.Lock()
|
|
self.closed = asyncio.Event()
|
|
|
|
def create_watchdog(self, t):
|
|
n_user_watchdogs = len(self.watchdogs)
|
|
if -1 in self.watchdogs:
|
|
n_user_watchdogs -= 1
|
|
avail = set(range(n_user_watchdogs + 1)) \
|
|
- set(self.watchdogs.keys())
|
|
wid = next(iter(avail))
|
|
self.watchdogs[wid] = time.monotonic() + t
|
|
return wid
|
|
|
|
def delete_watchdog(self, wid):
|
|
del self.watchdogs[wid]
|
|
|
|
def watchdog_time(self):
|
|
if self.watchdogs:
|
|
return min(self.watchdogs.values()) - time.monotonic()
|
|
else:
|
|
return None
|
|
|
|
@asyncio.coroutine
|
|
def _create_process(self):
|
|
yield from self.io_lock.acquire()
|
|
try:
|
|
if self.closed.is_set():
|
|
raise WorkerError("Attempting to create process after close")
|
|
self.process = yield from asyncio.create_subprocess_exec(
|
|
sys.executable, "-m", "artiq.master.worker_impl",
|
|
stdout=subprocess.PIPE, stdin=subprocess.PIPE)
|
|
finally:
|
|
self.io_lock.release()
|
|
|
|
@asyncio.coroutine
|
|
def close(self, term_timeout=1.0):
|
|
"""Interrupts any I/O with the worker process and terminates the
|
|
worker process.
|
|
|
|
This method should always be called by the user to clean up, even if
|
|
build() or examine() raises an exception."""
|
|
self.closed.set()
|
|
yield from self.io_lock.acquire()
|
|
try:
|
|
if self.process is None:
|
|
# Note the %s - self.rid can be None
|
|
logger.debug("worker was not created (RID %s)", self.rid)
|
|
return
|
|
if self.process.returncode is not None:
|
|
logger.debug("worker already terminated (RID %s)", self.rid)
|
|
if self.process.returncode != 0:
|
|
logger.warning("worker finished with status code %d"
|
|
" (RID %s)", self.process.returncode,
|
|
self.rid)
|
|
return
|
|
obj = {"action": "terminate"}
|
|
try:
|
|
yield from self._send(obj, cancellable=False)
|
|
except:
|
|
logger.warning("failed to send terminate command to worker"
|
|
" (RID %s), killing", self.rid, exc_info=True)
|
|
self.process.kill()
|
|
yield from asyncio_process_wait(self.process)
|
|
return
|
|
try:
|
|
yield from asyncio_process_wait_timeout(self.process,
|
|
term_timeout)
|
|
except asyncio.TimeoutError:
|
|
logger.warning("worker did not exit (RID %s), killing", self.rid)
|
|
self.process.kill()
|
|
yield from asyncio_process_wait(self.process)
|
|
else:
|
|
logger.debug("worker exited gracefully (RID %s)", self.rid)
|
|
finally:
|
|
self.io_lock.release()
|
|
|
|
@asyncio.coroutine
|
|
def _send(self, obj, cancellable=True):
|
|
assert self.io_lock.locked()
|
|
line = pyon.encode(obj)
|
|
self.process.stdin.write(line.encode())
|
|
self.process.stdin.write("\n".encode())
|
|
ifs = [self.process.stdin.drain()]
|
|
if cancellable:
|
|
ifs.append(self.closed.wait())
|
|
fs = yield from asyncio_wait_or_cancel(
|
|
ifs, timeout=self.send_timeout,
|
|
return_when=asyncio.FIRST_COMPLETED)
|
|
if all(f.cancelled() for f in fs):
|
|
raise WorkerTimeout("Timeout sending data to worker")
|
|
for f in fs:
|
|
if not f.cancelled() and f.done():
|
|
f.result() # raise any exceptions
|
|
if cancellable and self.closed.is_set():
|
|
raise WorkerError("Data transmission to worker cancelled")
|
|
|
|
@asyncio.coroutine
|
|
def _recv(self, timeout):
|
|
assert self.io_lock.locked()
|
|
fs = yield from asyncio_wait_or_cancel(
|
|
[self.process.stdout.readline(), self.closed.wait()],
|
|
timeout=timeout, return_when=asyncio.FIRST_COMPLETED)
|
|
if all(f.cancelled() for f in fs):
|
|
raise WorkerTimeout("Timeout receiving data from worker")
|
|
if self.closed.is_set():
|
|
raise WorkerError("Data transmission to worker cancelled")
|
|
line = fs[0].result()
|
|
if not line:
|
|
raise WorkerError("Worker ended while attempting to receive data")
|
|
try:
|
|
obj = pyon.decode(line.decode())
|
|
except:
|
|
raise WorkerError("Worker sent invalid PYON data")
|
|
return obj
|
|
|
|
@asyncio.coroutine
|
|
def _handle_worker_requests(self):
|
|
while True:
|
|
try:
|
|
yield from self.io_lock.acquire()
|
|
try:
|
|
obj = yield from self._recv(self.watchdog_time())
|
|
finally:
|
|
self.io_lock.release()
|
|
except WorkerTimeout:
|
|
raise WorkerWatchdogTimeout
|
|
action = obj["action"]
|
|
if action == "completed":
|
|
return True
|
|
elif action == "pause":
|
|
return False
|
|
del obj["action"]
|
|
if action == "create_watchdog":
|
|
func = self.create_watchdog
|
|
elif action == "delete_watchdog":
|
|
func = self.delete_watchdog
|
|
elif action == "register_experiment":
|
|
func = self.register_experiment
|
|
else:
|
|
func = self.handlers[action]
|
|
if getattr(func, "worker_pass_rid", False):
|
|
func = partial(func, self.rid)
|
|
try:
|
|
data = func(**obj)
|
|
reply = {"status": "ok", "data": data}
|
|
except:
|
|
reply = {"status": "failed",
|
|
"message": traceback.format_exc()}
|
|
yield from self.io_lock.acquire()
|
|
try:
|
|
yield from self._send(reply)
|
|
finally:
|
|
self.io_lock.release()
|
|
|
|
@asyncio.coroutine
|
|
def _worker_action(self, obj, timeout=None):
|
|
if timeout is not None:
|
|
self.watchdogs[-1] = time.monotonic() + timeout
|
|
try:
|
|
yield from self.io_lock.acquire()
|
|
try:
|
|
yield from self._send(obj)
|
|
finally:
|
|
self.io_lock.release()
|
|
try:
|
|
completed = yield from self._handle_worker_requests()
|
|
except WorkerTimeout:
|
|
raise WorkerWatchdogTimeout
|
|
finally:
|
|
if timeout is not None:
|
|
del self.watchdogs[-1]
|
|
return completed
|
|
|
|
@asyncio.coroutine
|
|
def build(self, rid, pipeline_name, expid, priority, timeout=15.0):
|
|
self.rid = rid
|
|
yield from self._create_process()
|
|
yield from self._worker_action(
|
|
{"action": "build",
|
|
"rid": rid,
|
|
"pipeline_name": pipeline_name,
|
|
"expid": expid,
|
|
"priority": priority},
|
|
timeout)
|
|
|
|
@asyncio.coroutine
|
|
def prepare(self):
|
|
yield from self._worker_action({"action": "prepare"})
|
|
|
|
@asyncio.coroutine
|
|
def run(self):
|
|
completed = yield from self._worker_action({"action": "run"})
|
|
if not completed:
|
|
self.yield_time = time.monotonic()
|
|
return completed
|
|
|
|
@asyncio.coroutine
|
|
def resume(self):
|
|
stop_duration = time.monotonic() - self.yield_time
|
|
for wid, expiry in self.watchdogs:
|
|
self.watchdogs[wid] += stop_duration
|
|
completed = yield from self._worker_action({"status": "ok",
|
|
"data": None})
|
|
if not completed:
|
|
self.yield_time = time.monotonic()
|
|
return completed
|
|
|
|
@asyncio.coroutine
|
|
def analyze(self):
|
|
yield from self._worker_action({"action": "analyze"})
|
|
|
|
@asyncio.coroutine
|
|
def write_results(self, timeout=15.0):
|
|
yield from self._worker_action({"action": "write_results"},
|
|
timeout)
|
|
|
|
@asyncio.coroutine
|
|
def examine(self, file, timeout=20.0):
|
|
yield from self._create_process()
|
|
r = dict()
|
|
def register(class_name, name, arguments):
|
|
r[class_name] = {"name": name, "arguments": arguments}
|
|
self.register_experiment = register
|
|
yield from self._worker_action({"action": "examine",
|
|
"file": file}, timeout)
|
|
del self.register_experiment
|
|
return r
|