mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-09-07 02:41:59 +00:00
Add in flight real time metrics for Measure blocks
This commit is contained in:
parent
ad9198cc34
commit
0a81038ea0
@ -18,8 +18,11 @@ import gc
|
||||
import logging
|
||||
import os
|
||||
import platform
|
||||
import threading
|
||||
import time
|
||||
|
||||
import six
|
||||
|
||||
import attr
|
||||
from prometheus_client import Counter, Gauge, Histogram
|
||||
from prometheus_client.core import REGISTRY, GaugeMetricFamily
|
||||
@ -68,7 +71,7 @@ class LaterGauge(object):
|
||||
return
|
||||
|
||||
if isinstance(calls, dict):
|
||||
for k, v in calls.items():
|
||||
for k, v in six.iteritems(calls):
|
||||
g.add_metric(k, v)
|
||||
else:
|
||||
g.add_metric([], calls)
|
||||
@ -87,6 +90,111 @@ class LaterGauge(object):
|
||||
all_gauges[self.name] = self
|
||||
|
||||
|
||||
class InFlightGauge(object):
|
||||
"""Tracks number of things (e.g. requests, Measure blocks, etc) in flight
|
||||
at any given time.
|
||||
|
||||
Each InFlightGauge will create a metric called `<name>_total` that counts
|
||||
the number of in flight blocks, as well as a metrics for each item in the
|
||||
given `sub_metrics` as `<name>_<sub_metric>` which will get updated by the
|
||||
callbacks.
|
||||
|
||||
Args:
|
||||
name (str)
|
||||
desc (str)
|
||||
labels (list[str])
|
||||
sub_metrics (list[str]): A list of sub metrics that the callbacks
|
||||
will update.
|
||||
"""
|
||||
|
||||
# TODO: Expand this to
|
||||
|
||||
def __init__(self, name, desc, labels, sub_metrics):
|
||||
self.name = name
|
||||
self.desc = desc
|
||||
self.labels = labels
|
||||
self.sub_metrics = sub_metrics
|
||||
|
||||
# Create a class which have the sub_metrics values as attributes, which
|
||||
# default to 0 on initialization. Used to pass to registered callbacks.
|
||||
self._metrics_class = attr.make_class(
|
||||
"_MetricsEntry",
|
||||
attrs={x: attr.ib(0) for x in sub_metrics},
|
||||
slots=True,
|
||||
)
|
||||
|
||||
# Counts number of in flight blocks for a given set of label values
|
||||
self._registrations = {}
|
||||
|
||||
# Protects access to _registrations
|
||||
self._lock = threading.Lock()
|
||||
|
||||
self._register_with_collector()
|
||||
|
||||
def register(self, key, callback):
|
||||
"""Registers that we've entered a new block with labels `key`.
|
||||
|
||||
`callback` gets called each time the metrics are collected. The same
|
||||
value must also be given to `unregister`.
|
||||
|
||||
`callback` gets called with an object that has an attribute per
|
||||
sub_metric, which should be updated with the necessary values. Note that
|
||||
the metrics object is shared between all callbacks registered with the
|
||||
same key.
|
||||
|
||||
Note that `callback` may be called on a separate thread.
|
||||
"""
|
||||
with self._lock:
|
||||
self._registrations.setdefault(key, set()).add(callback)
|
||||
|
||||
def unregister(self, key, callback):
|
||||
"""Registers that we've exited a block with labels `key`.
|
||||
"""
|
||||
|
||||
with self._lock:
|
||||
self._registrations.setdefault(key, set()).discard(callback)
|
||||
|
||||
def collect(self):
|
||||
"""Called by prometheus client when it reads metrics.
|
||||
|
||||
Note: may be called by a separate thread.
|
||||
"""
|
||||
in_flight = GaugeMetricFamily(self.name + "_total", self.desc, labels=self.labels)
|
||||
|
||||
metrics_by_key = {}
|
||||
|
||||
# We copy so that we don't mutate the list while iterating
|
||||
with self._lock:
|
||||
keys = list(self._registrations)
|
||||
|
||||
for key in keys:
|
||||
with self._lock:
|
||||
callbacks = set(self._registrations[key])
|
||||
|
||||
in_flight.add_metric(key, len(callbacks))
|
||||
|
||||
metrics = self._metrics_class()
|
||||
metrics_by_key[key] = metrics
|
||||
for callback in callbacks:
|
||||
callback(metrics)
|
||||
|
||||
yield in_flight
|
||||
|
||||
for name in self.sub_metrics:
|
||||
gauge = GaugeMetricFamily("_".join([self.name, name]), "", labels=self.labels)
|
||||
for key, metrics in six.iteritems(metrics_by_key):
|
||||
gauge.add_metric(key, getattr(metrics, name))
|
||||
yield gauge
|
||||
|
||||
def _register_with_collector(self):
|
||||
if self.name in all_gauges.keys():
|
||||
logger.warning("%s already registered, reregistering" % (self.name,))
|
||||
REGISTRY.unregister(all_gauges.pop(self.name))
|
||||
|
||||
REGISTRY.register(self)
|
||||
all_gauges[self.name] = self
|
||||
|
||||
|
||||
#
|
||||
# Detailed CPU metrics
|
||||
#
|
||||
|
@ -20,6 +20,7 @@ from prometheus_client import Counter
|
||||
|
||||
from twisted.internet import defer
|
||||
|
||||
from synapse.metrics import InFlightGauge
|
||||
from synapse.util.logcontext import LoggingContext
|
||||
|
||||
logger = logging.getLogger(__name__)
|
||||
@ -45,6 +46,13 @@ block_db_txn_duration = Counter(
|
||||
block_db_sched_duration = Counter(
|
||||
"synapse_util_metrics_block_db_sched_duration_seconds", "", ["block_name"])
|
||||
|
||||
# Tracks the number of blocks currently active
|
||||
in_flight = InFlightGauge(
|
||||
"synapse_util_metrics_block_in_flight", "",
|
||||
labels=["block_name"],
|
||||
sub_metrics=["real_time_max", "real_time_sum"],
|
||||
)
|
||||
|
||||
|
||||
def measure_func(name):
|
||||
def wrapper(func):
|
||||
@ -82,10 +90,14 @@ class Measure(object):
|
||||
|
||||
self.start_usage = self.start_context.get_resource_usage()
|
||||
|
||||
in_flight.register((self.name,), self._update_in_flight)
|
||||
|
||||
def __exit__(self, exc_type, exc_val, exc_tb):
|
||||
if isinstance(exc_type, Exception) or not self.start_context:
|
||||
return
|
||||
|
||||
in_flight.unregister((self.name,), self._update_in_flight)
|
||||
|
||||
duration = self.clock.time() - self.start
|
||||
|
||||
block_counter.labels(self.name).inc()
|
||||
@ -120,3 +132,13 @@ class Measure(object):
|
||||
|
||||
if self.created_context:
|
||||
self.start_context.__exit__(exc_type, exc_val, exc_tb)
|
||||
|
||||
def _update_in_flight(self, metrics):
|
||||
"""Gets called when processing in flight metrics
|
||||
"""
|
||||
duration = self.clock.time() - self.start
|
||||
|
||||
metrics.real_time_max = max(metrics.real_time_max, duration)
|
||||
metrics.real_time_sum += duration
|
||||
|
||||
# TODO: Add other in flight metrics.
|
||||
|
Loading…
Reference in New Issue
Block a user