| # SPDX-License-Identifier: GPL-2.0 |
| |
| import os |
| |
| sysfs_root = '/sys/kernel/mm/damon/admin' |
| |
| def write_file(path, string): |
| "Returns error string if failed, or None otherwise" |
| string = '%s' % string |
| try: |
| with open(path, 'w') as f: |
| f.write(string) |
| except Exception as e: |
| return '%s' % e |
| return None |
| |
| def read_file(path): |
| '''Returns the read content and error string. The read content is None if |
| the reading failed''' |
| try: |
| with open(path, 'r') as f: |
| return f.read(), None |
| except Exception as e: |
| return None, '%s' % e |
| |
| class DamosAccessPattern: |
| size = None |
| nr_accesses = None |
| age = None |
| scheme = None |
| |
| def __init__(self, size=None, nr_accesses=None, age=None): |
| self.size = size |
| self.nr_accesses = nr_accesses |
| self.age = age |
| |
| if self.size == None: |
| self.size = [0, 2**64 - 1] |
| if self.nr_accesses == None: |
| self.nr_accesses = [0, 2**64 - 1] |
| if self.age == None: |
| self.age = [0, 2**64 - 1] |
| |
| def sysfs_dir(self): |
| return os.path.join(self.scheme.sysfs_dir(), 'access_pattern') |
| |
| def stage(self): |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'sz', 'min'), self.size[0]) |
| if err != None: |
| return err |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'sz', 'max'), self.size[1]) |
| if err != None: |
| return err |
| err = write_file(os.path.join(self.sysfs_dir(), 'nr_accesses', 'min'), |
| self.nr_accesses[0]) |
| if err != None: |
| return err |
| err = write_file(os.path.join(self.sysfs_dir(), 'nr_accesses', 'max'), |
| self.nr_accesses[1]) |
| if err != None: |
| return err |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'age', 'min'), self.age[0]) |
| if err != None: |
| return err |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'age', 'max'), self.age[1]) |
| if err != None: |
| return err |
| |
| class Damos: |
| action = None |
| access_pattern = None |
| # todo: Support quotas, watermarks, stats, tried_regions |
| idx = None |
| context = None |
| tried_bytes = None |
| |
| def __init__(self, action='stat', access_pattern=DamosAccessPattern()): |
| self.action = action |
| self.access_pattern = access_pattern |
| self.access_pattern.scheme = self |
| |
| def sysfs_dir(self): |
| return os.path.join( |
| self.context.sysfs_dir(), 'schemes', '%d' % self.idx) |
| |
| def stage(self): |
| err = write_file(os.path.join(self.sysfs_dir(), 'action'), self.action) |
| if err != None: |
| return err |
| err = self.access_pattern.stage() |
| if err != None: |
| return err |
| |
| # disable quotas |
| err = write_file(os.path.join(self.sysfs_dir(), 'quotas', 'ms'), '0') |
| if err != None: |
| return err |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'quotas', 'bytes'), '0') |
| if err != None: |
| return err |
| |
| # disable watermarks |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'watermarks', 'metric'), 'none') |
| if err != None: |
| return err |
| |
| # disable filters |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'filters', 'nr_filters'), '0') |
| if err != None: |
| return err |
| |
| class DamonTarget: |
| pid = None |
| # todo: Support target regions if test is made |
| idx = None |
| context = None |
| |
| def __init__(self, pid): |
| self.pid = pid |
| |
| def sysfs_dir(self): |
| return os.path.join( |
| self.context.sysfs_dir(), 'targets', '%d' % self.idx) |
| |
| def stage(self): |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'regions', 'nr_regions'), '0') |
| if err != None: |
| return err |
| return write_file( |
| os.path.join(self.sysfs_dir(), 'pid_target'), self.pid) |
| |
| class DamonAttrs: |
| sample_us = None |
| aggr_us = None |
| update_us = None |
| min_nr_regions = None |
| max_nr_regions = None |
| context = None |
| |
| def __init__(self, sample_us=5000, aggr_us=100000, update_us=1000000, |
| min_nr_regions=10, max_nr_regions=1000): |
| self.sample_us = sample_us |
| self.aggr_us = aggr_us |
| self.update_us = update_us |
| self.min_nr_regions = min_nr_regions |
| self.max_nr_regions = max_nr_regions |
| |
| def interval_sysfs_dir(self): |
| return os.path.join(self.context.sysfs_dir(), 'monitoring_attrs', |
| 'intervals') |
| |
| def nr_regions_range_sysfs_dir(self): |
| return os.path.join(self.context.sysfs_dir(), 'monitoring_attrs', |
| 'nr_regions') |
| |
| def stage(self): |
| err = write_file(os.path.join(self.interval_sysfs_dir(), 'sample_us'), |
| self.sample_us) |
| if err != None: |
| return err |
| err = write_file(os.path.join(self.interval_sysfs_dir(), 'aggr_us'), |
| self.aggr_us) |
| if err != None: |
| return err |
| err = write_file(os.path.join(self.interval_sysfs_dir(), 'update_us'), |
| self.update_us) |
| if err != None: |
| return err |
| |
| err = write_file( |
| os.path.join(self.nr_regions_range_sysfs_dir(), 'min'), |
| self.min_nr_regions) |
| if err != None: |
| return err |
| |
| err = write_file( |
| os.path.join(self.nr_regions_range_sysfs_dir(), 'max'), |
| self.max_nr_regions) |
| if err != None: |
| return err |
| |
| class DamonCtx: |
| ops = None |
| monitoring_attrs = None |
| targets = None |
| schemes = None |
| kdamond = None |
| idx = None |
| |
| def __init__(self, ops='paddr', monitoring_attrs=DamonAttrs(), targets=[], |
| schemes=[]): |
| self.ops = ops |
| self.monitoring_attrs = monitoring_attrs |
| self.monitoring_attrs.context = self |
| |
| self.targets = targets |
| for idx, target in enumerate(self.targets): |
| target.idx = idx |
| target.context = self |
| |
| self.schemes = schemes |
| for idx, scheme in enumerate(self.schemes): |
| scheme.idx = idx |
| scheme.context = self |
| |
| def sysfs_dir(self): |
| return os.path.join(self.kdamond.sysfs_dir(), 'contexts', |
| '%d' % self.idx) |
| |
| def stage(self): |
| err = write_file( |
| os.path.join(self.sysfs_dir(), 'operations'), self.ops) |
| if err != None: |
| return err |
| err = self.monitoring_attrs.stage() |
| if err != None: |
| return err |
| |
| nr_targets_file = os.path.join( |
| self.sysfs_dir(), 'targets', 'nr_targets') |
| content, err = read_file(nr_targets_file) |
| if err != None: |
| return err |
| if int(content) != len(self.targets): |
| err = write_file(nr_targets_file, '%d' % len(self.targets)) |
| if err != None: |
| return err |
| for target in self.targets: |
| err = target.stage() |
| if err != None: |
| return err |
| |
| nr_schemes_file = os.path.join( |
| self.sysfs_dir(), 'schemes', 'nr_schemes') |
| content, err = read_file(nr_schemes_file) |
| if int(content) != len(self.schemes): |
| err = write_file(nr_schemes_file, '%d' % len(self.schemes)) |
| if err != None: |
| return err |
| for scheme in self.schemes: |
| err = scheme.stage() |
| if err != None: |
| return err |
| return None |
| |
| class Kdamond: |
| state = None |
| pid = None |
| contexts = None |
| idx = None # index of this kdamond between siblings |
| kdamonds = None # parent |
| |
| def __init__(self, contexts=[]): |
| self.contexts = contexts |
| for idx, context in enumerate(self.contexts): |
| context.idx = idx |
| context.kdamond = self |
| |
| def sysfs_dir(self): |
| return os.path.join(self.kdamonds.sysfs_dir(), '%d' % self.idx) |
| |
| def start(self): |
| nr_contexts_file = os.path.join(self.sysfs_dir(), |
| 'contexts', 'nr_contexts') |
| content, err = read_file(nr_contexts_file) |
| if err != None: |
| return err |
| if int(content) != len(self.contexts): |
| err = write_file(nr_contexts_file, '%d' % len(self.contexts)) |
| if err != None: |
| return err |
| |
| for context in self.contexts: |
| err = context.stage() |
| if err != None: |
| return err |
| err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'on') |
| return err |
| |
| def update_schemes_tried_bytes(self): |
| err = write_file(os.path.join(self.sysfs_dir(), 'state'), |
| 'update_schemes_tried_bytes') |
| if err != None: |
| return err |
| for context in self.contexts: |
| for scheme in context.schemes: |
| content, err = read_file(os.path.join(scheme.sysfs_dir(), |
| 'tried_regions', 'total_bytes')) |
| if err != None: |
| return err |
| scheme.tried_bytes = int(content) |
| |
| class Kdamonds: |
| kdamonds = [] |
| |
| def __init__(self, kdamonds=[]): |
| self.kdamonds = kdamonds |
| for idx, kdamond in enumerate(self.kdamonds): |
| kdamond.idx = idx |
| kdamond.kdamonds = self |
| |
| def sysfs_dir(self): |
| return os.path.join(sysfs_root, 'kdamonds') |
| |
| def start(self): |
| err = write_file(os.path.join(self.sysfs_dir(), 'nr_kdamonds'), |
| '%s' % len(self.kdamonds)) |
| if err != None: |
| return err |
| for kdamond in self.kdamonds: |
| err = kdamond.start() |
| if err != None: |
| return err |
| return None |
