forked from M-Labs/artiq
scheduler: refactor, fix pipeline hazards
This commit is contained in:
parent
47e3d0337d
commit
06badd1dc1
|
|
@ -4,8 +4,7 @@ from enum import Enum
|
|||
from time import time
|
||||
|
||||
from artiq.master.worker import Worker
|
||||
from artiq.tools import (asyncio_wait_or_cancel, asyncio_queue_peek,
|
||||
TaskObject, WaitSet)
|
||||
from artiq.tools import asyncio_wait_or_cancel, TaskObject, Condition
|
||||
from artiq.protocols.sync_struct import Notifier
|
||||
|
||||
|
||||
|
|
@ -20,7 +19,7 @@ class RunStatus(Enum):
|
|||
running = 4
|
||||
run_done = 5
|
||||
analyzing = 6
|
||||
analyze_done = 7
|
||||
deleting = 7
|
||||
paused = 8
|
||||
|
||||
|
||||
|
|
@ -48,7 +47,7 @@ def _mk_worker_method(name):
|
|||
class Run:
|
||||
def __init__(self, rid, pipeline_name,
|
||||
wd, expid, priority, due_date, flush,
|
||||
worker_handlers, notifier, **kwargs):
|
||||
pool, **kwargs):
|
||||
# called through pool
|
||||
self.rid = rid
|
||||
self.pipeline_name = pipeline_name
|
||||
|
|
@ -58,7 +57,7 @@ class Run:
|
|||
self.due_date = due_date
|
||||
self.flush = flush
|
||||
|
||||
self.worker = Worker(worker_handlers)
|
||||
self.worker = Worker(pool.worker_handlers)
|
||||
|
||||
self._status = RunStatus.pending
|
||||
|
||||
|
|
@ -71,8 +70,9 @@ class Run:
|
|||
"status": self._status.name
|
||||
}
|
||||
notification.update(kwargs)
|
||||
self._notifier = notifier
|
||||
self._notifier = pool.notifier
|
||||
self._notifier[self.rid] = notification
|
||||
self._state_changed = pool.state_changed
|
||||
|
||||
@property
|
||||
def status(self):
|
||||
|
|
@ -83,6 +83,7 @@ class Run:
|
|||
self._status = value
|
||||
if not self.worker.closed.is_set():
|
||||
self._notifier[self.rid]["status"] = self._status.name
|
||||
self._state_changed.notify()
|
||||
|
||||
# The run with the largest priority_key is to be scheduled first
|
||||
def priority_key(self, now=None):
|
||||
|
|
@ -130,28 +131,27 @@ class RIDCounter:
|
|||
class RunPool:
|
||||
def __init__(self, ridc, worker_handlers, notifier, repo_backend):
|
||||
self.runs = dict()
|
||||
self.submitted_cb = None
|
||||
self.state_changed = Condition()
|
||||
|
||||
self._ridc = ridc
|
||||
self._worker_handlers = worker_handlers
|
||||
self._notifier = notifier
|
||||
self._repo_backend = repo_backend
|
||||
self.ridc = ridc
|
||||
self.worker_handlers = worker_handlers
|
||||
self.notifier = notifier
|
||||
self.repo_backend = repo_backend
|
||||
|
||||
def submit(self, expid, priority, due_date, flush, pipeline_name):
|
||||
# mutates expid to insert head repository revision if None
|
||||
# called through scheduler
|
||||
rid = self._ridc.get()
|
||||
# mutates expid to insert head repository revision if None.
|
||||
# called through scheduler.
|
||||
rid = self.ridc.get()
|
||||
if "repo_rev" in expid:
|
||||
if expid["repo_rev"] is None:
|
||||
expid["repo_rev"] = self._repo_backend.get_head_rev()
|
||||
wd, repo_msg = self._repo_backend.request_rev(expid["repo_rev"])
|
||||
expid["repo_rev"] = self.repo_backend.get_head_rev()
|
||||
wd, repo_msg = self.repo_backend.request_rev(expid["repo_rev"])
|
||||
else:
|
||||
wd, repo_msg = None, None
|
||||
run = Run(rid, pipeline_name, wd, expid, priority, due_date, flush,
|
||||
self._worker_handlers, self._notifier, repo_msg=repo_msg)
|
||||
self, repo_msg=repo_msg)
|
||||
self.runs[rid] = run
|
||||
if self.submitted_cb is not None:
|
||||
self.submitted_cb()
|
||||
self.state_changed.notify()
|
||||
return rid
|
||||
|
||||
@asyncio.coroutine
|
||||
|
|
@ -162,47 +162,72 @@ class RunPool:
|
|||
run = self.runs[rid]
|
||||
yield from run.close()
|
||||
if "repo_rev" in run.expid:
|
||||
self._repo_backend.release_rev(run.expid["repo_rev"])
|
||||
self.repo_backend.release_rev(run.expid["repo_rev"])
|
||||
del self.runs[rid]
|
||||
|
||||
|
||||
class PrepareStage(TaskObject):
|
||||
def __init__(self, flush_tracker, delete_cb, pool, outq):
|
||||
self.flush_tracker = flush_tracker
|
||||
self.delete_cb = delete_cb
|
||||
def __init__(self, pool, delete_cb):
|
||||
self.pool = pool
|
||||
self.outq = outq
|
||||
self.delete_cb = delete_cb
|
||||
|
||||
self.pool_submitted = asyncio.Event()
|
||||
self.pool.submitted_cb = lambda: self.pool_submitted.set()
|
||||
|
||||
@asyncio.coroutine
|
||||
def _push_runs(self):
|
||||
"""Pushes all runs that have no due date of have a due date in the
|
||||
past.
|
||||
|
||||
Returns the time before the next schedulable run, or None if the
|
||||
pool is empty."""
|
||||
while True:
|
||||
def _get_run(self):
|
||||
"""If a run should get prepared now, return it.
|
||||
Otherwise, return a float representing the time before the next timed
|
||||
run becomes due, or None if there is no such run."""
|
||||
now = time()
|
||||
pending_runs = filter(lambda r: r.status == RunStatus.pending,
|
||||
self.pool.runs.values())
|
||||
try:
|
||||
run = max(pending_runs, key=lambda r: r.priority_key(now))
|
||||
candidate = max(pending_runs, key=lambda r: r.priority_key(now))
|
||||
except ValueError:
|
||||
# pending_runs is an empty sequence
|
||||
return None
|
||||
if run.due_date is None or run.due_date < now:
|
||||
|
||||
prepared_runs = filter(lambda r: r.status == RunStatus.prepare_done,
|
||||
self.pool.runs.values())
|
||||
try:
|
||||
top_prepared_run = max(prepared_runs,
|
||||
key=lambda r: r.priority_key())
|
||||
except ValueError:
|
||||
# there are no existing prepared runs - go ahead with <candidate>
|
||||
pass
|
||||
else:
|
||||
# prepare <candidate> (as well) only if it has higher priority than
|
||||
# the highest priority prepared run
|
||||
if top_prepared_run.priority_key() >= candidate.priority_key():
|
||||
return None
|
||||
|
||||
if candidate.due_date is None or candidate.due_date < now:
|
||||
return candidate
|
||||
else:
|
||||
return candidate.due_date - now
|
||||
|
||||
@asyncio.coroutine
|
||||
def _do(self):
|
||||
while True:
|
||||
run = self._get_run()
|
||||
if run is None:
|
||||
yield from self.pool.state_changed.wait()
|
||||
elif isinstance(run, float):
|
||||
yield from asyncio_wait_or_cancel([self.pool.state_changed.wait()],
|
||||
timeout=run)
|
||||
else:
|
||||
if run.flush:
|
||||
run.status = RunStatus.flushing
|
||||
while not all(r.status in (RunStatus.pending,
|
||||
RunStatus.deleting)
|
||||
or r is run
|
||||
for r in self.pool.runs.values()):
|
||||
ev = [self.pool.state_changed.wait(),
|
||||
run.worker.closed.wait()]
|
||||
yield from asyncio_wait_or_cancel(
|
||||
[self.flush_tracker.wait_empty(),
|
||||
run.worker.closed.wait()],
|
||||
return_when=asyncio.FIRST_COMPLETED)
|
||||
ev, return_when=asyncio.FIRST_COMPLETED)
|
||||
if run.worker.closed.is_set():
|
||||
break
|
||||
if run.worker.closed.is_set():
|
||||
continue
|
||||
run.status = RunStatus.preparing
|
||||
self.flush_tracker.add(run.rid)
|
||||
try:
|
||||
yield from run.build()
|
||||
yield from run.prepare()
|
||||
|
|
@ -211,44 +236,38 @@ class PrepareStage(TaskObject):
|
|||
"deleting RID %d",
|
||||
run.rid, exc_info=True)
|
||||
self.delete_cb(run.rid)
|
||||
else:
|
||||
run.status = RunStatus.prepare_done
|
||||
yield from self.outq.put(run)
|
||||
else:
|
||||
return run.due_date - now
|
||||
|
||||
@asyncio.coroutine
|
||||
def _do(self):
|
||||
while True:
|
||||
next_timed_in = yield from self._push_runs()
|
||||
if next_timed_in is None:
|
||||
# pool is empty - wait for something to be added to it
|
||||
yield from self.pool_submitted.wait()
|
||||
else:
|
||||
# wait for next_timed_in seconds, or until the pool is modified
|
||||
yield from asyncio_wait_or_cancel([self.pool_submitted.wait()],
|
||||
timeout=next_timed_in)
|
||||
self.pool_submitted.clear()
|
||||
|
||||
|
||||
class RunStage(TaskObject):
|
||||
def __init__(self, delete_cb, inq, outq):
|
||||
def __init__(self, pool, delete_cb):
|
||||
self.pool = pool
|
||||
self.delete_cb = delete_cb
|
||||
self.inq = inq
|
||||
self.outq = outq
|
||||
|
||||
def _get_run(self):
|
||||
prepared_runs = filter(lambda r: r.status == RunStatus.prepare_done,
|
||||
self.pool.runs.values())
|
||||
try:
|
||||
r = max(prepared_runs, key=lambda r: r.priority_key())
|
||||
except ValueError:
|
||||
# prepared_runs is an empty sequence
|
||||
r = None
|
||||
return r
|
||||
|
||||
@asyncio.coroutine
|
||||
def _do(self):
|
||||
stack = []
|
||||
|
||||
while True:
|
||||
try:
|
||||
next_irun = asyncio_queue_peek(self.inq)
|
||||
except asyncio.QueueEmpty:
|
||||
next_irun = None
|
||||
next_irun = self._get_run()
|
||||
if not stack or (
|
||||
next_irun is not None and
|
||||
next_irun.priority_key() > stack[-1].priority_key()):
|
||||
stack.append((yield from self.inq.get()))
|
||||
while next_irun is None:
|
||||
yield from self.pool.state_changed.wait()
|
||||
next_irun = self._get_run()
|
||||
stack.append(next_irun)
|
||||
|
||||
run = stack.pop()
|
||||
try:
|
||||
|
|
@ -266,21 +285,33 @@ class RunStage(TaskObject):
|
|||
else:
|
||||
if completed:
|
||||
run.status = RunStatus.run_done
|
||||
yield from self.outq.put(run)
|
||||
else:
|
||||
run.status = RunStatus.paused
|
||||
stack.append(run)
|
||||
|
||||
|
||||
class AnalyzeStage(TaskObject):
|
||||
def __init__(self, delete_cb, inq):
|
||||
def __init__(self, pool, delete_cb):
|
||||
self.pool = pool
|
||||
self.delete_cb = delete_cb
|
||||
self.inq = inq
|
||||
|
||||
def _get_run(self):
|
||||
run_runs = filter(lambda r: r.status == RunStatus.run_done,
|
||||
self.pool.runs.values())
|
||||
try:
|
||||
r = max(run_runs, key=lambda r: r.priority_key())
|
||||
except ValueError:
|
||||
# run_runs is an empty sequence
|
||||
r = None
|
||||
return r
|
||||
|
||||
@asyncio.coroutine
|
||||
def _do(self):
|
||||
while True:
|
||||
run = yield from self.inq.get()
|
||||
run = self._get_run()
|
||||
while run is None:
|
||||
yield from self.pool.state_changed.wait()
|
||||
run = self._get_run()
|
||||
run.status = RunStatus.analyzing
|
||||
try:
|
||||
yield from run.analyze()
|
||||
|
|
@ -290,22 +321,16 @@ class AnalyzeStage(TaskObject):
|
|||
"deleting RID %d",
|
||||
run.rid, exc_info=True)
|
||||
self.delete_cb(run.rid)
|
||||
run.status = RunStatus.analyze_done
|
||||
else:
|
||||
self.delete_cb(run.rid)
|
||||
|
||||
|
||||
class Pipeline:
|
||||
def __init__(self, ridc, deleter, worker_handlers, notifier, repo_backend):
|
||||
flush_tracker = WaitSet()
|
||||
def delete_cb(rid):
|
||||
deleter.delete(rid)
|
||||
flush_tracker.discard(rid)
|
||||
self.pool = RunPool(ridc, worker_handlers, notifier, repo_backend)
|
||||
self._prepare = PrepareStage(flush_tracker, delete_cb,
|
||||
self.pool, asyncio.Queue(maxsize=1))
|
||||
self._run = RunStage(delete_cb,
|
||||
self._prepare.outq, asyncio.Queue(maxsize=1))
|
||||
self._analyze = AnalyzeStage(delete_cb, self._run.outq)
|
||||
self._prepare = PrepareStage(self.pool, deleter.delete)
|
||||
self._run = RunStage(self.pool, deleter.delete)
|
||||
self._analyze = AnalyzeStage(self.pool, deleter.delete)
|
||||
|
||||
def start(self):
|
||||
self._prepare.start()
|
||||
|
|
@ -327,6 +352,10 @@ class Deleter(TaskObject):
|
|||
|
||||
def delete(self, rid):
|
||||
logger.debug("delete request for RID %d", rid)
|
||||
for pipeline in self._pipelines.values():
|
||||
if rid in pipeline.pool.runs:
|
||||
pipeline.pool.runs[rid].status = RunStatus.deleting
|
||||
break
|
||||
self._queue.put_nowait(rid)
|
||||
|
||||
@asyncio.coroutine
|
||||
|
|
|
|||
|
|
@ -50,7 +50,7 @@ def _get_basic_steps(rid, expid, priority=0, flush=False):
|
|||
"path": [rid]},
|
||||
{"action": "setitem", "key": "status", "value": "analyzing",
|
||||
"path": [rid]},
|
||||
{"action": "setitem", "key": "status", "value": "analyze_done",
|
||||
{"action": "setitem", "key": "status", "value": "deleting",
|
||||
"path": [rid]},
|
||||
{"action": "delitem", "key": rid, "path": []}
|
||||
]
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@ import logging
|
|||
import sys
|
||||
import asyncio
|
||||
import time
|
||||
import collections
|
||||
import os.path
|
||||
|
||||
from artiq.language.environment import is_experiment
|
||||
|
|
@ -125,14 +126,6 @@ def asyncio_wait_or_cancel(fs, **kwargs):
|
|||
return fs
|
||||
|
||||
|
||||
def asyncio_queue_peek(q):
|
||||
"""Like q.get_nowait(), but does not remove the item from the queue."""
|
||||
if q._queue:
|
||||
return q._queue[0]
|
||||
else:
|
||||
raise asyncio.QueueEmpty
|
||||
|
||||
|
||||
class TaskObject:
|
||||
def start(self):
|
||||
self.task = asyncio.async(self._do())
|
||||
|
|
@ -151,25 +144,25 @@ class TaskObject:
|
|||
raise NotImplementedError
|
||||
|
||||
|
||||
class WaitSet:
|
||||
def __init__(self):
|
||||
self._s = set()
|
||||
self._ev = asyncio.Event()
|
||||
|
||||
def _update_ev(self):
|
||||
if self._s:
|
||||
self._ev.clear()
|
||||
class Condition:
|
||||
def __init__(self, *, loop=None):
|
||||
if loop is not None:
|
||||
self._loop = loop
|
||||
else:
|
||||
self._ev.set()
|
||||
|
||||
def add(self, e):
|
||||
self._s.add(e)
|
||||
self._update_ev()
|
||||
|
||||
def discard(self, e):
|
||||
self._s.discard(e)
|
||||
self._update_ev()
|
||||
self._loop = asyncio.get_event_loop()
|
||||
self._waiters = collections.deque()
|
||||
|
||||
@asyncio.coroutine
|
||||
def wait_empty(self):
|
||||
yield from self._ev.wait()
|
||||
def wait(self):
|
||||
"""Wait until notified."""
|
||||
fut = asyncio.Future(loop=self._loop)
|
||||
self._waiters.append(fut)
|
||||
try:
|
||||
yield from fut
|
||||
finally:
|
||||
self._waiters.remove(fut)
|
||||
|
||||
def notify(self):
|
||||
for fut in self._waiters:
|
||||
if not fut.done():
|
||||
fut.set_result(False)
|
||||
|
|
|
|||
Loading…
Reference in New Issue