How to use move_tasks_into_container method in autotest

Best Python code snippet using autotest_python Github


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...88def cpus_path(container_name):89 return cpuset_attr(container_name, 'cpus')90def container_exists(name):91 return name is not None and os.path.exists(tasks_path(name))92def move_tasks_into_container(name, tasks):93 task_file = tasks_path(name)94 for task in tasks:95 try:96 logging.debug('moving task %s into container "%s"', task, name)97 utils.write_one_line(task_file, task)98 except Exception:99 if utils.pid_is_alive(task):100 raise # task exists but couldn't move it101 # task is gone or zombie so ignore this exception102def move_self_into_container(name):103 me = str(os.getpid())104 move_tasks_into_container(name, [me])105 logging.debug('running self (pid %s) in container "%s"', me, name)106def _avail_mbytes_via_nodes(parent):107 # total mbytes of mem nodes available for new containers in parent108 free_nodes = available_exclusive_mem_nodes(parent)109 mbytes = nodes_avail_mbytes(free_nodes)110 # don't have exact model for how container mgr measures mem space111 # better here to underestimate than overestimate112 mbytes = max(mbytes - node_mbytes//2, 0)113 return mbytes114def _avail_bytes_via_pages(parent):115 # Get memory bytes available to parent container which could116 # be allocated exclusively to new child containers.117 # This excludes mem previously allocated to existing children.118 available = container_bytes(parent)119 mem_files_pattern = os.path.join(full_path(parent),120 '*', 'memory.limit_in_bytes')121 for mem_file in glob.glob(mem_files_pattern):122 child_container = unpath(os.path.dirname(mem_file))123 available -= container_bytes(child_container)124 return available125def avail_mbytes(parent=SUPER_ROOT):126 # total mbytes available in parent, for exclusive use in new containers127 if fake_numa_containers:128 return _avail_mbytes_via_nodes(parent)129 else:130 return _avail_bytes_via_pages(parent) >> 20131def delete_leftover_test_containers():132 # recover mems and cores tied up by containers of prior failed tests:133 for child in inner_containers_of(SUPER_ROOT):134 _release_container_nest(child)135def my_lock(lockname):136 # lockname is 'inner'137 lockdir = os.environ['AUTODIR']138 lockname = os.path.join(lockdir, '.cpuset.lock.'+lockname)139 lockfile = open(lockname, 'w')140 fcntl.flock(lockfile, fcntl.LOCK_EX)141 return lockfile142def my_unlock(lockfile):143 fcntl.flock(lockfile, fcntl.LOCK_UN)144 lockfile.close()145# Convert '1-3,7,9-12' to set(1,2,3,7,9,10,11,12)146def rangelist_to_set(rangelist):147 result = set()148 if not rangelist:149 return result150 for x in rangelist.split(','):151 if re.match(r'^(\d+)$', x):152 result.add(int(x))153 continue154 m = re.match(r'^(\d+)-(\d+)$', x)155 if m:156 start = int( end = int( result.update(set(range(start, end+1)))159 continue160 msg = 'Cannot understand data input: %s %s' % (x, rangelist)161 raise ValueError(msg)162 return result163def my_container_name():164 # Get current process's inherited or self-built container name165 # within /dev/cpuset or /dev/cgroup. Is '' for root container.166 name = utils.read_one_line('/proc/%i/cpuset' % os.getpid())167 return name[1:] # strip leading /168def get_mem_nodes(container_name):169 # all mem nodes now available to a container, both exclusive & shared170 file_name = mems_path(container_name)171 if os.path.exists(file_name):172 return rangelist_to_set(utils.read_one_line(file_name))173 else:174 return set()175def _busy_mem_nodes(parent_container):176 # Get set of numa memory nodes now used (exclusively or shared)177 # by existing children of parent container178 busy = set()179 mem_files_pattern = os.path.join(full_path(parent_container),180 '*', cpuset_prefix+'mems')181 for mem_file in glob.glob(mem_files_pattern):182 child_container = os.path.dirname(mem_file)183 busy |= get_mem_nodes(child_container)184 return busy185def available_exclusive_mem_nodes(parent_container):186 # Get subset of numa memory nodes of parent container which could187 # be allocated exclusively to new child containers.188 # This excludes nodes now allocated to existing children.189 need_fake_numa()190 available = get_mem_nodes(parent_container)191 available -= _busy_mem_nodes(parent_container)192 return available193def my_mem_nodes():194 # Get set of numa memory nodes owned by current process's container.195 discover_container_style()196 if not mem_isolation_on:197 return set() # as expected by vmstress198 return get_mem_nodes(my_container_name())199def my_available_exclusive_mem_nodes():200 # Get subset of numa memory nodes owned by current process's201 # container, which could be allocated exclusively to new child202 # containers. This excludes any nodes now allocated203 # to existing children.204 return available_exclusive_mem_nodes(my_container_name())205def node_avail_kbytes(node):206 return node_mbytes << 10 # crude; fixed numa node size207def nodes_avail_mbytes(nodes):208 # nodes' combined user+avail size, in Mbytes209 return sum(node_avail_kbytes(n) for n in nodes) // 1024210def container_bytes(name):211 if fake_numa_containers:212 return nodes_avail_mbytes(get_mem_nodes(name)) << 20213 else:214 while True:215 file = memory_path(name) + '.limit_in_bytes'216 limit = int(utils.read_one_line(file))217 if limit < NO_LIMIT:218 return limit219 if name == SUPER_ROOT:220 return root_container_bytes221 name = os.path.dirname(name)222def container_mbytes(name):223 return container_bytes(name) >> 20224def mbytes_per_mem_node():225 # Get mbyte size of standard numa mem node, as float226 # (some nodes are bigger than this)227 # Replaces utils.node_size().228 numa = get_boot_numa()229 if numa.endswith('M'):230 return float(numa[:-1]) # mbyte size of fake nodes231 elif numa:232 nodecnt = int(numa) # fake numa mem nodes for container isolation233 else:234 nodecnt = len(utils.numa_nodes()) # phys mem-controller nodes235 # Use guessed total physical mem size, not kernel's236 # lesser 'available memory' after various system tables.237 return utils.rounded_memtotal() / (nodecnt * 1024.0)238def get_cpus(container_name):239 file_name = cpus_path(container_name)240 if os.path.exists(file_name):241 return rangelist_to_set(utils.read_one_line(file_name))242 else:243 return set()244def get_tasks(container_name):245 file_name = tasks_path(container_name)246 try:247 tasks = [x.rstrip() for x in open(file_name).readlines()]248 except IOError:249 if os.path.exists(file_name):250 raise251 tasks = [] # container doesn't exist anymore252 return tasks253def inner_containers_of(parent):254 pattern = os.path.join(full_path(parent), '*/tasks')255 return [unpath(os.path.dirname(task_file))256 for task_file in glob.glob(pattern)]257def _release_container_nest(nest):258 # Destroy a container, and any nested sub-containers259 nest_path = full_path(nest)260 if os.path.exists(nest_path):261 # bottom-up walk of tree, releasing all nested sub-containers262 for child in inner_containers_of(nest):263 _release_container_nest(child)264 logging.debug("releasing container %s", nest)265 # Transfer any survivor tasks (e.g. self) to parent container266 parent = os.path.dirname(nest)267 move_tasks_into_container(parent, get_tasks(nest))268 # remove the now-empty outermost container of this nest269 if os.path.exists(nest_path):270 os.rmdir(nest_path) # nested, or dead manager271def release_container(container_name=None):272 # Destroy a container273 my_container = my_container_name()274 if container_name is None:275 container_name = my_container276 _release_container_nest(container_name)277 displaced = my_container_name()278 if displaced != my_container:279 logging.debug('now running self (pid %d) in container "%s"',280 os.getpid(), displaced)281def remove_empty_prio_classes(prios):...

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