mirror of
https://github.com/ARM-software/devlib.git
synced 2024-10-05 18:30:50 +01:00
Merge pull request #3 from derkling/drk-for-master
Fixes and additions for master
This commit is contained in:
setrofim
commit
f46057f836
@ -22,9 +22,7 @@ from devlib.utils.misc import list_to_ranges, isiterable
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from devlib.utils.types import boolean
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class CgroupController(object):
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kind = 'cpuset'
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class Controller(object):
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def __new__(cls, arg):
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if isinstance(arg, cls):
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@ -32,98 +30,90 @@ class CgroupController(object):
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else:
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return object.__new__(cls, arg)
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def __init__(self, mount_name):
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def __init__(self, kind):
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self.mount_name = 'devlib_'+kind
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self.kind = kind
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self.target = None
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self.logger = logging.getLogger('cgroups.'+self.kind)
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self.mount_point = None
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self.mount_name = mount_name
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self.logger = logging.getLogger(self.kind)
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self._cgroups = {}
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def probe(self, target):
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raise NotImplementedError()
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try:
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exists = target.execute('{} grep {} /proc/cgroups'\
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.format(target.busybox, self.kind))
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except TargetError:
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return False
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return True
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def mount(self, device, mount_root):
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self.target = device
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self.mount_point = device.path.join(mount_root, self.mount_name)
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mounted = self.target.list_file_systems()
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if self.mount_point in [e.mount_point for e in mounted]:
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self.logger.debug('controller is already mounted.')
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def mount(self, target, mount_root):
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mounted = target.list_file_systems()
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if self.mount_name in [e.device for e in mounted]:
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# Identify mount point if controller is already in use
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self.mount_point = [
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fs.mount_point
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for fs in mounted
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if fs.device == self.mount_name
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][0]
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else:
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self.target.execute('mkdir -p {} 2>/dev/null'.format(self.mount_point),
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as_root=True)
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self.target.execute('mount -t cgroup -o {} {} {}'.format(self.kind,
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# Mount the controller if not already in use
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self.mount_point = target.path.join(mount_root, self.mount_name)
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target.execute('mkdir -p {} 2>/dev/null'\
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.format(self.mount_point), as_root=True)
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target.execute('mount -t cgroup -o {} {} {}'\
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.format(self.kind,
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self.mount_name,
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self.mount_point),
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as_root=True)
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self.logger.info('Controller %s mounted under: %s',
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self.kind, self.mount_point)
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class CpusetGroup(object):
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# Mark this contoller as available
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self.target = target
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def __init__(self, controller, name, cpus, mems):
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self.controller = controller
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self.target = controller.target
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self.name = name
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if name == 'root':
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self.directory = controller.mount_point
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else:
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self.directory = self.target.path.join(controller.mount_point, name)
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self.target.execute('mkdir -p {}'.format(self.directory), as_root=True)
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self.cpus_file = self.target.path.join(self.directory, 'cpuset.cpus')
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self.mems_file = self.target.path.join(self.directory, 'cpuset.mems')
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self.tasks_file = self.target.path.join(self.directory, 'tasks')
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self.set(cpus, mems)
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# Create root control group
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self.cgroup('/')
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def set(self, cpus, mems):
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if isiterable(cpus):
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cpus = list_to_ranges(cpus)
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if isiterable(mems):
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mems = list_to_ranges(mems)
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self.target.write_value(self.cpus_file, cpus)
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self.target.write_value(self.mems_file, mems)
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def cgroup(self, name):
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if not self.target:
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raise RuntimeError('CGroup creation failed: {} controller not mounted'\
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.format(self.kind))
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if name not in self._cgroups:
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self._cgroups[name] = CGroup(self, name)
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return self._cgroups[name]
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def get(self):
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cpus = self.target.read_value(self.cpus_file)
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mems = self.target.read_value(self.mems_file)
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return (cpus, mems)
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def exists(self, name):
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if not self.target:
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raise RuntimeError('CGroup creation failed: {} controller not mounted'\
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.format(self.kind))
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if name not in self._cgroups:
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self._cgroups[name] = CGroup(self, name, create=False)
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return self._cgroups[name].existe()
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def get_tasks(self):
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task_ids = self.target.read_value(self.tasks_file).split()
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return map(int, task_ids)
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def add_tasks(self, tasks):
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for tid in tasks:
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self.add_task(tid)
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def add_task(self, tid):
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self.target.write_value(self.tasks_file, tid, verify=False)
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class CpusetController(CgroupController):
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name = 'cpuset'
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def __init__(self, *args, **kwargs):
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super(CpusetController, self).__init__(*args, **kwargs)
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self.groups = {}
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def probe(self, target):
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return target.config.is_enabled('cpusets')
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def mount(self, device, mount_root):
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super(CpusetController, self).mount(device, mount_root)
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self.create_group('root', self.target.list_online_cpus(), 0)
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def create_group(self, name, cpus, mems):
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if not hasattr(self, 'target'):
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raise RuntimeError('Attempting to create group for unmounted controller {}'.format(self.kind))
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if name in self.groups:
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raise ValueError('Group {} already exists'.format(name))
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self.groups[name] = CpusetGroup(self, name, cpus, mems)
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def list_all(self):
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self.logger.debug('Listing groups for %s controller', self.kind)
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output = self.target.execute('{} find {} -type d'\
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.format(self.target.busybox, self.mount_point))
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cgroups = []
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for cg in output.split('\n'):
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cg = cg.replace(self.mount_point + '/', '/')
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cg = cg.replace(self.mount_point, '/')
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cg = cg.strip()
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if cg == '':
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continue
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self.logger.debug('Populate %s cgroup: %s', self.kind, cg)
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cgroups.append(cg)
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return cgroups
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def move_tasks(self, source, dest):
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try:
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source_group = self.groups[source]
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dest_group = self.groups[dest]
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srcg = self._cgroups[source]
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dstg = self._cgroups[dest]
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command = 'for task in $(cat {}); do echo $task>{}; done'
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self.target.execute(command.format(source_group.tasks_file, dest_group.tasks_file),
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self.target.execute(command.format(srcg.tasks_file, dstg.tasks_file),
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# this will always fail as some of the tasks
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# are kthreads that cannot be migrated, but we
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# don't care about those, so don't check exit
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@ -132,61 +122,146 @@ class CpusetController(CgroupController):
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except KeyError as e:
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raise ValueError('Unkown group: {}'.format(e))
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def move_all_tasks_to(self, target_group):
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for group in self.groups:
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if group != target_group:
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self.move_tasks(group, target_group)
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def move_all_tasks_to(self, dest):
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for cgroup in self._cgroups:
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if cgroup != dest:
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self.move_tasks(cgroup, dest)
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def __getattr__(self, name):
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class CGroup(object):
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def __init__(self, controller, name, create=True):
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self.logger = logging.getLogger('cgroups.' + controller.kind)
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self.target = controller.target
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self.controller = controller
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self.name = name
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# Control cgroup path
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self.directory = controller.mount_point
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if name != '/':
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self.directory = self.target.path.join(controller.mount_point, name[1:])
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# Setup path for tasks file
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self.tasks_file = self.target.path.join(self.directory, 'tasks')
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self.procs_file = self.target.path.join(self.directory, 'cgroup.procs')
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if not create:
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return
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self.logger.info('Creating cgroup %s', self.directory)
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self.target.execute('[ -d {0} ] || mkdir -p {0}'\
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.format(self.directory), as_root=True)
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def exists(self):
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try:
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return self.groups[name]
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except KeyError:
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raise AttributeError(name)
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self.target.execute('[ -d {0} ]'\
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.format(self.directory))
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return True
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except TargetError:
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return False
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def get(self):
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conf = {}
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logging.debug('Reading %s attributes from:',
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self.controller.kind)
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logging.debug(' %s',
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self.directory)
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output = self.target.execute('{} grep \'\' {}/{}.*'.format(
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self.target.busybox,
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self.directory,
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self.controller.kind))
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for res in output.split('\n'):
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if res.find(self.controller.kind) < 0:
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continue
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res = res.split('.')[1]
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attr = res.split(':')[0]
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value = res.split(':')[1]
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conf[attr] = value
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return conf
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def set(self, **attrs):
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for idx in attrs:
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if isiterable(attrs[idx]):
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attrs[idx] = list_to_ranges(attrs[idx])
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# Build attribute path
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path = '{}.{}'.format(self.controller.kind, idx)
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path = self.target.path.join(self.directory, path)
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self.logger.debug('Set attribute [%s] to: %s"',
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path, attrs[idx])
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# Set the attribute value
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self.target.write_value(path, attrs[idx])
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def get_tasks(self):
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task_ids = self.target.read_value(self.tasks_file).split()
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logging.debug('Tasks: %s', task_ids)
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return map(int, task_ids)
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def add_task(self, tid):
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self.target.write_value(self.tasks_file, tid, verify=False)
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def add_tasks(self, tasks):
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for tid in tasks:
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self.add_task(tid)
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def add_proc(self, pid):
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self.target.write_value(self.procs_file, pid, verify=False)
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CgroupSubsystemEntry = namedtuple('CgroupSubsystemEntry', 'name hierarchy num_cgroups enabled')
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class CgroupsModule(Module):
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name = 'cgroups'
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controller_cls = [
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CpusetController,
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]
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cgroup_root = '/sys/fs/cgroup'
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@staticmethod
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def probe(target):
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return target.config.has('cgroups') and target.is_rooted
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def __init__(self, target):
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super(CgroupsModule, self).__init__(target)
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self.logger = logging.getLogger('CGroups')
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# Initialize controllers mount point
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mounted = self.target.list_file_systems()
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if self.cgroup_root not in [e.mount_point for e in mounted]:
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self.target.execute('mount -t tmpfs {} {}'.format('cgroup_root', self.cgroup_root),
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self.target.execute('mount -t tmpfs {} {}'\
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.format('cgroup_root',
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self.cgroup_root),
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as_root=True)
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else:
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self.logger.debug('cgroup_root already mounted at {}'.format(self.cgroup_root))
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self.controllers = []
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for cls in self.controller_cls:
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controller = cls('devlib_{}'.format(cls.name))
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if controller.probe(self.target):
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if controller.mount_name in [e.device for e in mounted]:
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self.logger.debug('controller {} is already mounted.'.format(controller.kind))
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else:
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self.logger.debug('cgroup_root already mounted at %s',
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self.cgroup_root)
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# Load list of available controllers
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controllers = []
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subsys = self.list_subsystems()
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for (n, h, c, e) in subsys:
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controllers.append(n)
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self.logger.info('Available controllers: %s', controllers)
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# Initialize controllers
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self.controllers = {}
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for idx in controllers:
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controller = Controller(idx)
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self.logger.debug('Init %s controller...', controller.kind)
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if not controller.probe(self.target):
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continue
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try:
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controller.mount(self.target, self.cgroup_root)
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except TargetError:
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message = 'cgroups {} controller is not supported by the target'
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raise TargetError(message.format(controller.kind))
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self.logger.debug('Controller %s enabled', controller.kind)
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self.controllers[idx] = controller
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def list_subsystems(self):
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subsystems = []
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for line in self.target.execute('cat /proc/cgroups').split('\n')[1:]:
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for line in self.target.execute('{} cat /proc/cgroups'\
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.format(self.target.busybox)).split('\n')[1:]:
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line = line.strip()
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if not line or line.startswith('#'):
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continue
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@ -198,9 +273,9 @@ class CgroupsModule(Module):
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return subsystems
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def get_cgroup_controller(self, kind):
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for controller in self.controllers:
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if controller.kind == kind:
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return controller
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raise ValueError(kind)
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def controller(self, kind):
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if kind not in self.controllers:
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self.logger.warning('Controller %s not available', kind)
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return None
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return self.controllers[kind]
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@ -57,6 +57,10 @@ def ssh_get_shell(host, username, password=None, keyfile=None, port=None, timeou
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conn.login(host, username, password, port=port, login_timeout=timeout)
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except EOF:
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raise TargetError('Could not connect to {}; is the host name correct?'.format(host))
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conn.setwinsize(500,200)
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conn.sendline('')
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conn.prompt()
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conn.setecho(False)
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return conn
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