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#!/usr/bin/env python3
# SPDX-License-Identifier: LGPL-2.1-only
#
# Test to replace idle_thread of scope unit using cgclassify -r
#
# Copyright (c) 2023 Oracle and/or its affiliates.
# Author: Kamalesh Babulal <kamalesh.babulal@oracle.com>
#
from process import Process
from cgroup import Cgroup
from run import RunError
import consts
import ftests
import time
import sys
import os
CONTROLLER = 'cpu'
SLICE = 'libcgroup.slice'
CGNAME = os.path.join(SLICE, '088cgcreate.scope')
OUT_OF_SCOPE_CGNAME1 = '088outofscope'
OUT_OF_SCOPE_CGNAME2 = '088outofscope.scope'
def prereqs(config):
result = consts.TEST_PASSED
cause = None
if config.args.container:
result = consts.TEST_SKIPPED
cause = 'This test cannot be run within a container'
return result, cause
def setup(config):
pass
def test(config):
result = consts.TEST_PASSED
cause = None
#
# Test 1: call cgclassify -r to replace idle_thread with infinite while loop
#
Cgroup.create_and_validate(config, CONTROLLER, CGNAME, create_scope=True)
idle_pid = Cgroup.get_pids_in_cgroup(config, CGNAME, CONTROLLER)[0]
config.process.create_process_in_cgroup(config, CONTROLLER, CGNAME,
cgclassify=True, replace_idle=True)
# We need pause, before the cgroups.procs gets updated, post cgclassify
time.sleep(1)
pid = Cgroup.get_pids_in_cgroup(config, CGNAME, CONTROLLER)
if len(pid) > 1 and idle_pid == pid[0]:
result = consts.TEST_FAILED
cause = 'Failed to replace scope idle_thread pid {}'.format(idle_pid)
return result, cause
#
# Test 2: call cgclassify -r to replace non-idle_thread (while loop,
# previously created) with another while loop.
#
try:
config.process.create_process_in_cgroup(config, CONTROLLER, CGNAME,
cgclassify=True, replace_idle=True)
except RunError as re:
if "Failed to find idle_thread task" not in re.stderr:
raise re
else:
result = consts.TEST_FAILED
cause = 'Erroneously classified a task in scope cgroup {}\n'.format(CGNAME)
return result, cause
# We need pause, before the cgroups.procs gets updated, post cgclassify
time.sleep(1)
replace_pid = Cgroup.get_pids_in_cgroup(config, CGNAME, CONTROLLER)
if replace_pid[0] != pid[0]:
result = consts.TEST_FAILED
cause = ('Erroneously replaced scope non idle_thread pid {} with '
'pid {}'.format(pid[0], replace_pid[0]))
return result, cause
#
# Test 3: create a non-scope cgroup, try creating a task with replace_idle
# set.
#
Cgroup.create_and_validate(config, CONTROLLER, OUT_OF_SCOPE_CGNAME1)
try:
config.process.create_process_in_cgroup(config, CONTROLLER, OUT_OF_SCOPE_CGNAME1,
cgclassify=True, replace_idle=True)
except RunError as re:
if "Failed to find idle_thread task" not in re.stderr:
raise re
else:
result = consts.TEST_FAILED
cause = ('Erroneously classified a task in non scope '
'cgroup {}\n'.format(OUT_OF_SCOPE_CGNAME1))
return result, cause
# We need pause, before the cgroups.procs gets updated, post cgclassify
time.sleep(1)
pid = Cgroup.get_pids_in_cgroup(config, OUT_OF_SCOPE_CGNAME1, CONTROLLER)
if len(pid) != 0:
result = consts.TEST_FAILED
cause = ('Erroneously classified a task in non scope '
'cgroup {}\n'.format(OUT_OF_SCOPE_CGNAME1))
return result, cause
#
# Test 4: create a non-scope cgroup with .scope suffix, try creating a task with
# replace_idle set.
#
Cgroup.create_and_validate(config, CONTROLLER, OUT_OF_SCOPE_CGNAME2)
try:
config.process.create_process_in_cgroup(config, CONTROLLER, OUT_OF_SCOPE_CGNAME2,
cgclassify=True, replace_idle=True)
except RunError as re:
if "Failed to find idle_thread task" not in re.stderr:
raise re
else:
result = consts.TEST_FAILED
cause = ('Erroneously classified a task in non scope '
'cgroup {}\n'.format(OUT_OF_SCOPE_CGNAME2))
return result, cause
# We need pause, before the cgroups.procs gets updated, post cgclassify
time.sleep(1)
pid = Cgroup.get_pids_in_cgroup(config, OUT_OF_SCOPE_CGNAME2, CONTROLLER)
if len(pid) != 0:
result = consts.TEST_FAILED
cause = ('Erroneously classified a task in non scope '
'cgroup {}\n'.format(OUT_OF_SCOPE_CGNAME2))
return result, cause
def teardown(config):
pid = Cgroup.get_pids_in_cgroup(config, OUT_OF_SCOPE_CGNAME1, CONTROLLER)
Process.kill(config, pid)
pid = Cgroup.get_pids_in_cgroup(config, OUT_OF_SCOPE_CGNAME2, CONTROLLER)
Process.kill(config, pid)
Cgroup.delete(config, CONTROLLER, OUT_OF_SCOPE_CGNAME1)
Cgroup.delete(config, CONTROLLER, OUT_OF_SCOPE_CGNAME2)
pid = Cgroup.get_pids_in_cgroup(config, CGNAME, CONTROLLER)
Process.kill(config, pid)
# systemd will automatically remove the cgroup once there are no more pids in
# the cgroup, so we don't need to delete CGNAME. But let's try to remove the
# slice
try:
Cgroup.delete(config, CONTROLLER, SLICE)
except RunError:
pass
def main(config):
[result, cause] = prereqs(config)
if result != consts.TEST_PASSED:
return [result, cause]
setup(config)
[result, cause] = test(config)
teardown(config)
return [result, cause]
if __name__ == '__main__':
config = ftests.parse_args()
# this test was invoked directly. run only it
config.args.num = int(os.path.basename(__file__).split('-')[0])
sys.exit(ftests.main(config))
# vim: set et ts=4 sw=4:
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