How to use set_io_controls method in autotest

Best Python code snippet using autotest_python

cpuset.py

Source:cpuset.py

...287    paths = glob.glob('/sys/block/sd*')288    if not paths:289        paths = glob.glob('/sys/block/hd*')290    return [os.path.basename(path) for path in paths]291def set_io_controls(container_name, disks=[], ioprio_classes=[PROPIO_NORMAL],292                    io_shares=[95], io_limits=[0]):293    # set the propio controls for one container, for selected disks294    # writing directly to /dev/cgroup/container_name/io.io_service_level295    #    without using containerd or container.py296    # See wiki ProportionalIOScheduler for definitions297    # ioprio_classes: list of service classes, one per disk298    #    using numeric propio service classes as used by kernel API, namely299    #       1: RT, Real Time, aka PROPIO_PRIO300    #       2: BE, Best Effort, aka PROPIO_NORMAL301    #       3: PROPIO_IDLE302    # io_shares: list of disk-time-fractions, one per disk,303    #       as percentage integer 0..100304    # io_limits: list of limit on/off, one per disk305    #       0: no limit, shares use of other containers' unused disk time306    #       1: limited, container's use of disk time is capped to given DTF307    # ioprio_classes defaults to best-effort308    # io_limit defaults to no limit, use slack time309    if not disks:  # defaults to all drives310        disks = all_drive_names()311        io_shares      = [io_shares     [0]] * len(disks)312        ioprio_classes = [ioprio_classes[0]] * len(disks)313        io_limits      = [io_limits     [0]] * len(disks)314    if not (len(disks) == len(ioprio_classes) and len(disks) == len(io_shares)315                                              and len(disks) == len(io_limits)):316        raise error.AutotestError('Unequal number of values for io controls')317    service_level = io_attr(container_name, 'io_service_level')318    if not os.path.exists(service_level):319        return  # kernel predates propio features320            # or io cgroup is mounted separately from cpusets321    disk_infos = []322    for disk,ioclass,limit,share in zip(disks, ioprio_classes,323                                        io_limits, io_shares):324        parts = (disk, str(ioclass), str(limit), str(share))325        disk_info = ' '.join(parts)326        utils.write_one_line(service_level, disk_info)327        disk_infos.append(disk_info)328    logging.debug('set_io_controls of %s to %s',329                  container_name, ', '.join(disk_infos))330def abbrev_list(vals):331    """Condense unsigned (0,4,5,6,7,10) to '0,4-7,10'."""332    ranges = []333    lower = 0334    upper = -2335    for val in sorted(vals)+[-1]:336        if val != upper+1:337            if lower == upper:338                ranges.append(str(lower))339            elif lower <= upper:340                ranges.append('%d-%d' % (lower, upper))341            lower = val342        upper = val343    return ','.join(ranges)344def create_container_with_specific_mems_cpus(name, mems, cpus):345    need_fake_numa()346    os.mkdir(full_path(name))347    utils.write_one_line(cpuset_attr(name, 'mem_hardwall'), '1')348    utils.write_one_line(mems_path(name), ','.join(map(str, mems)))349    utils.write_one_line(cpus_path(name), ','.join(map(str, cpus)))350    logging.debug('container %s has %d cpus and %d nodes totalling %s bytes',351                  name, len(cpus), len(get_mem_nodes(name)),352                  utils.human_format(container_bytes(name)) )353def create_container_via_memcg(name, parent, bytes, cpus):354    # create container via direct memcg cgroup writes355    os.mkdir(full_path(name))356    nodes = utils.read_one_line(mems_path(parent))357    utils.write_one_line(mems_path(name), nodes)  # inherit parent's nodes358    utils.write_one_line(memory_path(name)+'.limit_in_bytes', str(bytes))359    utils.write_one_line(cpus_path(name), ','.join(map(str, cpus)))360    logging.debug('Created container %s directly via memcg,'361                  ' has %d cpus and %s bytes',362                  name, len(cpus), utils.human_format(container_bytes(name)))363def _create_fake_numa_container_directly(name, parent, mbytes, cpus):364    need_fake_numa()365    lockfile = my_lock('inner')   # serialize race between parallel tests366    try:367        # Pick specific mem nodes for new cpuset's exclusive use368        # For now, arbitrarily pick highest available node numbers369        needed_kbytes = mbytes * 1024370        nodes = sorted(list(available_exclusive_mem_nodes(parent)))371        kbytes = 0372        nodecnt = 0373        while kbytes < needed_kbytes and nodecnt < len(nodes):374            nodecnt += 1375            kbytes += node_avail_kbytes(nodes[-nodecnt])376        if kbytes < needed_kbytes:377            parent_mbytes = container_mbytes(parent)378            if mbytes > parent_mbytes:379                raise error.AutotestError(380                      "New container's %d Mbytes exceeds "381                      "parent container's %d Mbyte size"382                      % (mbytes, parent_mbytes) )383            else:384                raise error.AutotestError(385                      "Existing sibling containers hold "386                      "%d Mbytes needed by new container"387                      % ((needed_kbytes - kbytes)//1024) )388        mems = nodes[-nodecnt:]389        create_container_with_specific_mems_cpus(name, mems, cpus)390    finally:391        my_unlock(lockfile)392def create_container_directly(name, mbytes, cpus):393    parent = os.path.dirname(name)394    if fake_numa_containers:395        _create_fake_numa_container_directly(name, parent, mbytes, cpus)396    else:397        create_container_via_memcg(name, parent, mbytes<<20, cpus)398def create_container_with_mbytes_and_specific_cpus(name, mbytes,399                cpus=None, root=SUPER_ROOT, io={}, move_in=True, timeout=0):400    """\401    Create a cpuset container and move job's current pid into it402    Allocate the list "cpus" of cpus to that container403            name = arbitrary string tag404            mbytes = reqested memory for job in megabytes405            cpus = list of cpu indicies to associate with the cpuset406                  defaults to all cpus avail with given root407            root = the parent cpuset to nest this new set within408                   '': unnested top-level container409            io = arguments for proportional IO containers410            move_in = True: Move current process into the new container now.411            timeout = must be 0: persist until explicitly deleted.412    """413    need_mem_containers()414    if not container_exists(root):415        raise error.AutotestError('Parent container "%s" does not exist'416                                   % root)417    if cpus is None:418        # default to biggest container we can make under root419        cpus = get_cpus(root)420    else:421        cpus = set(cpus)  # interface uses list422    if not cpus:423        raise error.AutotestError('Creating container with no cpus')424    name = os.path.join(root, name)  # path relative to super_root425    if os.path.exists(full_path(name)):426        raise error.AutotestError('Container %s already exists' % name)427    create_container_directly(name, mbytes, cpus)428    set_io_controls(name, **io)429    if move_in:430        move_self_into_container(name)431    return name432def get_boot_numa():433    # get boot-time numa=fake=xyz option for current boot434    #   eg  numa=fake=nnn,  numa=fake=nnnM, or nothing435    label = 'numa=fake='436    for arg in utils.read_one_line('/proc/cmdline').split():437        if arg.startswith(label):438            return arg[len(label):]...

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