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Further improve parallel execution.

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This commit is contained in:
Darko Poljak 2017-07-26 17:39:07 +02:00
parent d1a044cc23
commit 23fbabe303
2 changed files with 11 additions and 14 deletions
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13
cdist/config.py
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@ -29,7 +29,7 @@ import itertools
import tempfile
import socket
import multiprocessing
from cdist.mputil import mp_pool_run
from cdist.mputil import mp_pool_run, mp_sig_handler
import atexit
import shutil
@ -138,12 +138,8 @@ class Config(object):
if args.parallel:
import signal
def sigterm_handler(signum, frame):
log.trace("signal %s, killing whole process group", signum)
os.killpg(os.getpgrp(), signal.SIGKILL)
signal.signal(signal.SIGTERM, sigterm_handler)
signal.signal(signal.SIGHUP, sigterm_handler)
signal.signal(signal.SIGTERM, mp_sig_handler)
signal.signal(signal.SIGHUP, mp_sig_handler)
# FIXME: Refactor relict - remove later
log = logging.getLogger("cdist")
@ -221,8 +217,7 @@ class Config(object):
cls.onehost(*process_args[0])
except cdist.Error as e:
failed_hosts.append(host)
# Catch errors in parallel mode when joining
if args.parallel:
elif args.parallel:
log.trace("Multiprocessing start method is {}".format(
multiprocessing.get_start_method()))
log.trace(("Starting multiprocessing Pool for {} "

12
cdist/mputil.py
View file

@ -1,6 +1,6 @@
# -*- coding: utf-8 -*-
#
# 2016 Darko Poljak (darko.poljak at gmail.com)
# 2016-2017 Darko Poljak (darko.poljak at gmail.com)
#
# This file is part of cdist.
#
@ -31,6 +31,11 @@ import logging
log = logging.getLogger("cdist-mputil")
def mp_sig_handler(signum, frame):
log.trace("signal %s, SIGKILL whole process group", signum)
os.killpg(os.getpgrp(), signal.SIGKILL)
def mp_pool_run(func, args=None, kwds=None, jobs=multiprocessing.cpu_count()):
"""Run func using concurrent.futures.ProcessPoolExecutor with jobs jobs
and supplied iterables of args and kwds with one entry for each
@ -56,8 +61,5 @@ def mp_pool_run(func, args=None, kwds=None, jobs=multiprocessing.cpu_count()):
retval.append(f.result())
return retval
except KeyboardInterrupt:
log.trace("KeyboardInterrupt, killing process group")
# When Ctrl+C in terminal then kill whole process group.
# Otherwise there remain processes in sleeping state.
os.killpg(os.getpgrp(), signal.SIGKILL)
mp_sig_handler(signal.SIGINT, None)
raise