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visdom_reporter.py
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visdom_reporter.py
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"""
A crude but effective metrics digest. Works with Visdom.
Example Usage:
$ python -m visdom.server # in a separate terminal
$ python scripts/visdom_reporter.py \
--state ./runs/.visdom_state.json \ # keeps state for the reporter
--root ./runs \ # crawls directory for experiments and metric files
--suffix .metric \ # file extension indicating a metric file
--verbose # turn on for verbose logging
"""
import gflags
from visdom import Visdom
import numpy as np
import json
from spinn.util.metrics import MetricsReader, size
import os
import sys
import time
import logging
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
logger = logging.getLogger()
logger.setLevel(logging.INFO)
logging.basicConfig(level=logging.INFO,
format='%(asctime)s [INFO] - %(message)s',
datefmt='%Y-%m-%d %H:%M:%S')
def is_metric_file(components, suffix):
if len(components) < 2:
return False
elif components[-1].endswith(suffix):
return True
else:
return False
def get_components(path, suffix):
components = path.split(os.sep)
if not is_metric_file(components, suffix):
return None
else:
experiment_name = components[-2]
metric_name = components[-1][:-len(suffix)]
return experiment_name, metric_name
class VisdomUpdater(object):
def __init__(self, root, suffix, env='main', minimum=2, limit=100):
self.env = env
self.root = root
self.minimum = minimum
self.limit = limit
self.suffix = suffix
self.viz = Visdom()
self.init_state()
self.scan()
def scan(self):
for root, dirs, files in os.walk(self.root):
# No need to scan files if this fails.
canary = os.path.join(root, 'canary' + self.suffix)
if get_components(canary, self.suffix) is None:
continue
for file in files:
components = get_components(os.path.join(root, file), self.suffix)
if components is None:
continue
experiment_name, metric_name = components
self.update_metric(experiment_name, metric_name)
# --- State Methods ---
def init_state(self):
""" State maintains a dictionary:
state: {
[experiment_name]: {
[metric_name]: location in file
}
}
"""
path = os.path.join(self.root, '.viz_state.json')
if os.path.exists(path):
self.state = json.load(open(path))
else:
self.state = dict()
def get_experiment(self, experiment_name):
return self.state.setdefault(experiment_name, dict())
def update_state(self, experiment_name, metric_name, offset):
experiment = self.get_experiment(experiment_name)
experiment[metric_name] = offset
self.save_state()
def save_state(self):
path = os.path.join(self.root, '.viz_state.json')
json.dump(self.state, open(path, 'w'))
# --- Metric Methods ---
def read_metric(self, experiment_name, metric_name, offset=0):
experiment_root = os.path.join(self.root, experiment_name)
reader = MetricsReader(experiment_root)
return reader.read(metric_name, offset=offset)
def update_metric(self, experiment_name, metric_name):
logger.debug("Updating: {} - {}".format(experiment_name, metric_name))
experiment = self.get_experiment(experiment_name)
offset = experiment.setdefault(metric_name, 0)
table = self.read_metric(experiment_name, metric_name, offset)
index = 0
while True:
if len(table) - index < self.minimum:
break
n = index + min(index + self.limit, len(table))
vals, steps = list(zip(*table[index:n]))
steps = np.array(steps)
vals = np.array(vals)
success = self.viz_write(self.env, experiment_name, metric_name, steps, vals)
if not success:
break
else:
new_offset = offset + index + n
index = index + n
self.update_state(experiment_name, metric_name, new_offset)
# --- Visdom Methods ---
def viz_success(self, win):
if win == "win does not exist":
return False
return True
def viz_write(self, env, experiment_name, metric_name, steps, vals):
viz = self.viz
try:
win = viz.updateTrace(X=steps, Y=vals,
name=experiment_name, win=metric_name, env=env,
append=True)
if not self.viz_success(win):
viz.line(X=steps, Y=vals,
win=metric_name, env=env,
opts={ "legend": [experiment_name], "title": metric_name })
return True
except Exception as e:
import ipdb; ipdb.set_trace()
return False
class VisdomEventHandler(FileSystemEventHandler):
"""Logs metrics to visdom."""
def __init__(self, root, suffix, env, *args, **kwargs):
super(VisdomEventHandler, self).__init__(*args, **kwargs)
self.suffix = suffix
self.updater = VisdomUpdater(root, suffix, env)
def handle_all_events(self, event):
if not event.is_directory:
components = get_components(event.src_path, self.suffix)
if components is None:
# Not a metric file.
return
experiment_name, metric_name = components
self.updater.update_metric(experiment_name, metric_name)
# --- Overriden methods ---
def on_moved(self, event):
super(VisdomEventHandler, self).on_moved(event)
# noop
def on_created(self, event):
super(VisdomEventHandler, self).on_created(event)
self.handle_all_events(event)
def on_deleted(self, event):
super(VisdomEventHandler, self).on_deleted(event)
# noop
def on_modified(self, event):
super(VisdomEventHandler, self).on_modified(event)
self.handle_all_events(event)
if __name__ == "__main__":
FLAGS = gflags.FLAGS
gflags.DEFINE_string("state", ".", "Path to state. Used to update metrics.")
gflags.DEFINE_string("root", "./runs", "Path to log directory. Will "
"track changes to any file in this directory.")
gflags.DEFINE_string("env", "main", "The env group for visdom.")
gflags.DEFINE_string("suffix", ".metric", "Suffix indicating metric file.")
gflags.DEFINE_boolean("verbose", False, "")
FLAGS(sys.argv)
if FLAGS.verbose:
logger.setLevel(logging.DEBUG)
logging.basicConfig(level=logging.DEBUG,
format='%(asctime)s [DEBUG] - %(message)s',
datefmt='%Y-%m-%d %H:%M:%S')
event_handler = VisdomEventHandler(FLAGS.root, FLAGS.suffix, FLAGS.env)
observer = Observer()
observer.schedule(event_handler, FLAGS.root, recursive=True)
observer.start()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()