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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
import json
import os
import subprocess
import _damon_sysfs
def dump_damon_status_dict(pid):
try:
subprocess.check_output(['which', 'drgn'], stderr=subprocess.DEVNULL)
except:
return None, 'drgn not found'
file_dir = os.path.dirname(os.path.abspath(__file__))
dump_script = os.path.join(file_dir, 'drgn_dump_damon_status.py')
rc = subprocess.call(['drgn', dump_script, pid, 'damon_dump_output'],
stderr=subprocess.DEVNULL)
if rc != 0:
return None, 'drgn fail'
try:
with open('damon_dump_output', 'r') as f:
return json.load(f), None
except Exception as e:
return None, 'json.load fail (%s)' % e
def fail(expectation, status):
print('unexpected %s' % expectation)
print(json.dumps(status, indent=4))
exit(1)
def assert_true(condition, expectation, status):
if condition is not True:
fail(expectation, status)
def assert_watermarks_committed(watermarks, dump):
wmark_metric_val = {
'none': 0,
'free_mem_rate': 1,
}
assert_true(dump['metric'] == wmark_metric_val[watermarks.metric],
'metric', dump)
assert_true(dump['interval'] == watermarks.interval, 'interval', dump)
assert_true(dump['high'] == watermarks.high, 'high', dump)
assert_true(dump['mid'] == watermarks.mid, 'mid', dump)
assert_true(dump['low'] == watermarks.low, 'low', dump)
def assert_quota_goal_committed(qgoal, dump):
metric_val = {
'user_input': 0,
'some_mem_psi_us': 1,
'node_mem_used_bp': 2,
'node_mem_free_bp': 3,
}
assert_true(dump['metric'] == metric_val[qgoal.metric], 'metric', dump)
assert_true(dump['target_value'] == qgoal.target_value, 'target_value',
dump)
if qgoal.metric == 'user_input':
assert_true(dump['current_value'] == qgoal.current_value,
'current_value', dump)
assert_true(dump['nid'] == qgoal.nid, 'nid', dump)
def assert_quota_committed(quota, dump):
assert_true(dump['reset_interval'] == quota.reset_interval_ms,
'reset_interval', dump)
assert_true(dump['ms'] == quota.ms, 'ms', dump)
assert_true(dump['sz'] == quota.sz, 'sz', dump)
for idx, qgoal in enumerate(quota.goals):
assert_quota_goal_committed(qgoal, dump['goals'][idx])
assert_true(dump['weight_sz'] == quota.weight_sz_permil, 'weight_sz', dump)
assert_true(dump['weight_nr_accesses'] == quota.weight_nr_accesses_permil,
'weight_nr_accesses', dump)
assert_true(
dump['weight_age'] == quota.weight_age_permil, 'weight_age', dump)
def assert_migrate_dests_committed(dests, dump):
assert_true(dump['nr_dests'] == len(dests.dests), 'nr_dests', dump)
for idx, dest in enumerate(dests.dests):
assert_true(dump['node_id_arr'][idx] == dest.id, 'node_id', dump)
assert_true(dump['weight_arr'][idx] == dest.weight, 'weight', dump)
def main():
kdamonds = _damon_sysfs.Kdamonds(
[_damon_sysfs.Kdamond(
contexts=[_damon_sysfs.DamonCtx(
targets=[_damon_sysfs.DamonTarget(pid=-1)],
schemes=[_damon_sysfs.Damos()],
)])])
err = kdamonds.start()
if err is not None:
print('kdamond start failed: %s' % err)
exit(1)
status, err = dump_damon_status_dict(kdamonds.kdamonds[0].pid)
if err is not None:
print(err)
kdamonds.stop()
exit(1)
if len(status['contexts']) != 1:
fail('number of contexts', status)
ctx = status['contexts'][0]
attrs = ctx['attrs']
if attrs['sample_interval'] != 5000:
fail('sample interval', status)
if attrs['aggr_interval'] != 100000:
fail('aggr interval', status)
if attrs['ops_update_interval'] != 1000000:
fail('ops updte interval', status)
if attrs['intervals_goal'] != {
'access_bp': 0, 'aggrs': 0,
'min_sample_us': 0, 'max_sample_us': 0}:
fail('intervals goal')
if attrs['min_nr_regions'] != 10:
fail('min_nr_regions')
if attrs['max_nr_regions'] != 1000:
fail('max_nr_regions')
if ctx['adaptive_targets'] != [
{ 'pid': 0, 'nr_regions': 0, 'regions_list': []}]:
fail('adaptive targets', status)
if len(ctx['schemes']) != 1:
fail('number of schemes', status)
scheme = ctx['schemes'][0]
if scheme['pattern'] != {
'min_sz_region': 0,
'max_sz_region': 2**64 - 1,
'min_nr_accesses': 0,
'max_nr_accesses': 2**32 - 1,
'min_age_region': 0,
'max_age_region': 2**32 - 1,
}:
fail('damos pattern', status)
if scheme['action'] != 9: # stat
fail('damos action', status)
if scheme['apply_interval_us'] != 0:
fail('damos apply interval', status)
if scheme['target_nid'] != -1:
fail('damos target nid', status)
assert_migrate_dests_committed(_damon_sysfs.DamosDests(),
scheme['migrate_dests'])
assert_quota_committed(_damon_sysfs.DamosQuota(), scheme['quota'])
assert_watermarks_committed(_damon_sysfs.DamosWatermarks(),
scheme['wmarks'])
kdamonds.stop()
if __name__ == '__main__':
main()
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