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#!/usr/bin/python -Ott
# -*- coding: utf-8 -*-
""" Benchmark template rendering times """
import sys
import time
import math
import signal
import logging
import operator
import Bcfg2.Logger
import Bcfg2.Options
import Bcfg2.Server.Core
def stdev(nums):
mean = float(sum(nums)) / len(nums)
return math.sqrt(sum((n - mean)**2 for n in nums) / float(len(nums)))
def get_sigint_handler(core):
""" Get a function that handles SIGINT/Ctrl-C by shutting down the
core and exiting properly."""
def hdlr(sig, frame): # pylint: disable=W0613
""" Handle SIGINT/Ctrl-C by shutting down the core and exiting
properly. """
core.shutdown()
os._exit(1) # pylint: disable=W0212
return hdlr
def main():
optinfo = dict(
client=Bcfg2.Options.Option("Benchmark templates for one client",
cmd="--client",
odesc="<client>",
long_arg=True,
default=None),
runs=Bcfg2.Options.Option("Number of rendering passes per template",
cmd="--runs",
odesc="<runs>",
long_arg=True,
default=5,
cook=int))
optinfo.update(Bcfg2.Options.CLI_COMMON_OPTIONS)
optinfo.update(Bcfg2.Options.SERVER_COMMON_OPTIONS)
setup = Bcfg2.Options.OptionParser(optinfo)
setup.parse(sys.argv[1:])
if setup['debug']:
level = logging.DEBUG
elif setup['verbose']:
level = logging.INFO
else:
level = logging.WARNING
Bcfg2.Logger.setup_logging("bcfg2-test",
to_console=setup['verbose'] or setup['debug'],
to_syslog=False,
to_file=setup['logging'],
level=level)
logger = logging.getLogger(sys.argv[0])
core = Bcfg2.Server.Core.BaseCore(setup)
signal.signal(signal.SIGINT, get_sigint_handler(core))
logger.info("Bcfg2 server core loaded")
core.load_plugins()
logger.debug("Plugins loaded")
core.block_for_fam_events(handle_events=True)
logger.debug("Repository events processed")
if setup['args']:
templates = setup['args']
else:
templates = []
if setup['client'] is None:
clients = [core.build_metadata(c) for c in core.metadata.clients]
else:
clients = [core.build_metadata(setup['client'])]
times = dict()
client_count = 0
for metadata in clients:
client_count += 1
logger.info("Rendering templates for client %s (%s/%s)" %
(metadata.hostname, client_count, len(clients)))
structs = core.GetStructures(metadata)
struct_count = 0
for struct in structs:
struct_count += 1
logger.info("Rendering templates from structure %s:%s (%s/%s)" %
(struct.tag, struct.get("name"), struct_count,
len(structs)))
entries = struct.xpath("//Path")
entry_count = 0
for entry in entries:
entry_count += 1
if templates and entry.get("name") not in templates:
continue
logger.info("Rendering Path:%s (%s/%s)..." %
(entry.get("name"), entry_count, len(entries)))
ptimes = times.setdefault(entry.get("name"), [])
for i in range(setup['runs']):
start = time.time()
try:
core.Bind(entry, metadata)
ptimes.append(time.time() - start)
except:
break
if ptimes:
avg = sum(ptimes) / len(ptimes)
if avg:
logger.debug(" %s: %.02f sec" %
(metadata.hostname, avg))
# print out per-file results
tmpltimes = []
for tmpl, ptimes in times.items():
try:
mean = float(sum(ptimes)) / len(ptimes)
except ZeroDivisionError:
continue
ptimes.sort()
median = ptimes[len(ptimes) / 2]
std = stdev(ptimes)
if mean > 0.01 or median > 0.01 or std > 1 or templates:
tmpltimes.append((tmpl, mean, median, std))
print("%-50s %-9s %-11s %6s" %
("Template", "Mean Time", "Median Time", "σ"))
for info in reversed(sorted(tmpltimes, key=operator.itemgetter(1))):
print("%-50s %9.02f %11.02f %6.02f" % info)
core.shutdown()
if __name__ == "__main__":
sys.exit(main())
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