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from __future__ import print_function, division, absolute_import
from collections import deque
import logging
from .progress_stream import color_of
from .plugin import SchedulerPlugin
from ..utils import key_split, format_time, parse_timedelta
from ..metrics import time
logger = logging.getLogger(__name__)
class TaskStreamPlugin(SchedulerPlugin):
def __init__(self, scheduler, maxlen=100000):
self.buffer = deque(maxlen=maxlen)
self.scheduler = scheduler
scheduler.add_plugin(self)
self.index = 0
def transition(self, key, start, finish, *args, **kwargs):
if start == 'processing':
if key not in self.scheduler.tasks:
return
kwargs['key'] = key
if finish == 'memory' or finish == 'erred':
self.buffer.append(kwargs)
self.index += 1
def collect(self, start=None, stop=None, count=None):
def bisect(target, left, right):
if left == right:
return left
mid = (left + right) // 2
value = max(stop for _, start, stop in self.buffer[mid]['startstops'])
if value < target:
return bisect(target, mid + 1, right)
else:
return bisect(target, left, mid)
if isinstance(start, str):
start = time() - parse_timedelta(start)
if start is not None:
start = bisect(start, 0, len(self.buffer))
if isinstance(stop, str):
stop = time() - parse_timedelta(stop)
if stop is not None:
stop = bisect(stop, 0, len(self.buffer))
if count is not None:
if start is None and stop is None:
stop = len(self.buffer)
start = stop - count
elif start is None and stop is not None:
start = stop - count
elif start is not None and stop is None:
stop = start + count
if stop is None:
stop = len(self.buffer)
if start is None:
start = 0
start = max(0, start)
stop = min(stop, len(self.buffer))
return [self.buffer[i] for i in range(start, stop)]
def rectangles(self, istart, istop=None, workers=None, start_boundary=0):
msgs = []
diff = self.index - len(self.buffer)
if istop is None:
istop = len(self.buffer)
for i in range((istart or 0) - diff, istop - diff if istop else istop):
msg = self.buffer[i]
msgs.append(msg)
return rectangles(msgs, workers=workers, start_boundary=start_boundary)
def rectangles(msgs, workers=None, start_boundary=0):
if workers is None:
workers = {}
L_start = []
L_duration = []
L_duration_text = []
L_key = []
L_name = []
L_color = []
L_alpha = []
L_worker = []
L_worker_thread = []
L_y = []
for msg in msgs:
key = msg['key']
name = key_split(key)
startstops = msg.get('startstops', [])
try:
worker_thread = '%s-%d' % (msg['worker'], msg['thread'])
except Exception:
continue
logger.warning("Message contained bad information: %s", msg,
exc_info=True)
worker_thread = ''
if worker_thread not in workers:
workers[worker_thread] = len(workers) / 2
for action, start, stop in startstops:
if start < start_boundary:
continue
color = colors[action]
if type(color) is not str:
color = color(msg)
L_start.append((start + stop) / 2 * 1000)
L_duration.append(1000 * (stop - start))
L_duration_text.append(format_time(stop - start))
L_key.append(key)
L_name.append(prefix[action] + name)
L_color.append(color)
L_alpha.append(alphas[action])
L_worker.append(msg['worker'])
L_worker_thread.append(worker_thread)
L_y.append(workers[worker_thread])
return {'start': L_start,
'duration': L_duration,
'duration_text': L_duration_text,
'key': L_key,
'name': L_name,
'color': L_color,
'alpha': L_alpha,
'worker': L_worker,
'worker_thread': L_worker_thread,
'y': L_y}
def color_of_message(msg):
if msg['status'] == 'OK':
split = key_split(msg['key'])
return color_of(split)
else:
return 'black'
colors = {'transfer': 'red',
'disk-write': 'orange',
'disk-read': 'orange',
'deserialize': 'gray',
'compute': color_of_message}
alphas = {'transfer': 0.4,
'compute': 1,
'deserialize': 0.4,
'disk-write': 0.4,
'disk-read': 0.4}
prefix = {'transfer': 'transfer-',
'disk-write': 'disk-write-',
'disk-read': 'disk-read-',
'deserialize': 'deserialize-',
'compute': ''}
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