def test_ioclass_stats_set(prepare_and_cleanup):
"""Try to retrieve stats for all set ioclasses"""
prepare()
min_ioclass_id = 1
max_ioclass_id = 11
ioclass_config.create_ioclass_config(
add_default_rule=True, ioclass_config_path=ioclass_config_path
)
TestProperties.LOGGER.info("Preparing ioclass config file")
for i in range(min_ioclass_id, max_ioclass_id):
ioclass_config.add_ioclass(
ioclass_id=(i + 10),
eviction_priority=22,
allocation=True,
rule=f"file_size:le:{4096*i}&done",
ioclass_config_path=ioclass_config_path,
)
casadm.load_io_classes(cache_id, file=ioclass_config_path)
TestProperties.LOGGER.info("Preparing ioclass config file")
for i in range(32):
if i != 0 or i not in range(min_ioclass_id, max_ioclass_id):
with pytest.raises(Exception):
assert casadm_parser.get_statistics(
cache_id=cache_id, io_class_id=True, filter=[StatsFilter.conf]
)
def prepare(filesystem, cores_number):
ioclass_config.remove_ioclass_config()
cache_device = TestRun.disks["cache"]
core_device = TestRun.disks["core"]
cache_device.create_partitions([Size(10, Unit.GibiByte)])
core_device.create_partitions([Size(5, Unit.GibiByte)] * cores_number)
cache_device = cache_device.partitions[0]
cache = casadm.start_cache(cache_device,
cache_mode=CacheMode.WT,
force=True)
Udev.disable()
casadm.set_param_cleaning(cache_id=cache.cache_id,
policy=CleaningPolicy.nop)
cores = []
for part in core_device.partitions:
if filesystem:
part.create_filesystem(filesystem)
cores.append(casadm.add_core(cache, core_dev=part))
cache.set_seq_cutoff_policy(SeqCutOffPolicy.never)
ioclass_config.create_ioclass_config(
add_default_rule=False,
ioclass_config_path=ioclass_config.default_config_file_path)
# To make test more precise all workload except of tested ioclass should be
# put in pass-through mode
ioclass_config.add_ioclass(
ioclass_id=0,
eviction_priority=22,
allocation="1.00",
rule="unclassified",
ioclass_config_path=ioclass_config.default_config_file_path,
)
ioclass_config.add_ioclass(
ioclass_id=1,
eviction_priority=22,
allocation="0.00",
rule="metadata",
ioclass_config_path=ioclass_config.default_config_file_path,
)
ioclass_config.add_ioclass(
ioclass_id=2,
eviction_priority=22,
allocation="0.00",
rule="direct",
ioclass_config_path=ioclass_config.default_config_file_path,
)
return cache, cores
def load_io_classes_in_permutation_order(rules, permutation, cache):
ioclass_config.remove_ioclass_config(ioclass_config_path=ioclass_config_path)
ioclass_config.create_ioclass_config(
add_default_rule=False, ioclass_config_path=ioclass_config_path
)
# To make test more precise all workload except of tested ioclass should be
# put in pass-through mode
ioclass_list = [IoClass.default(allocation=False)]
for n in range(len(rules)):
ioclass_list.append(IoClass(class_id=permutation[n], rule=rules[n]))
IoClass.save_list_to_config_file(ioclass_list,
add_default_rule=False,
ioclass_config_path=ioclass_config_path)
casadm.load_io_classes(cache.cache_id, file=ioclass_config_path)
def prepare(
cache_size=Size(500, Unit.MebiByte),
core_size=Size(10, Unit.GibiByte),
cache_mode=CacheMode.WB,
cache_line_size=CacheLineSize.LINE_4KiB,
):
ioclass_config.remove_ioclass_config()
cache_device = TestRun.disks["cache"]
core_device = TestRun.disks["core"]
cache_device.create_partitions([cache_size])
core_device.create_partitions([core_size])
cache_device = cache_device.partitions[0]
core_device = core_device.partitions[0]
TestRun.LOGGER.info(f"Starting cache")
cache = casadm.start_cache(cache_device,
cache_mode=cache_mode,
cache_line_size=cache_line_size,
force=True)
Udev.disable()
TestRun.LOGGER.info(f"Setting cleaning policy to NOP")
casadm.set_param_cleaning(cache_id=cache.cache_id,
policy=CleaningPolicy.nop)
TestRun.LOGGER.info(f"Adding core device")
core = casadm.add_core(cache, core_dev=core_device)
TestRun.LOGGER.info(f"Setting seq cutoff policy to never")
core.set_seq_cutoff_policy(SeqCutOffPolicy.never)
ioclass_config.create_ioclass_config(
add_default_rule=False, ioclass_config_path=ioclass_config_path)
# To make test more precise all workload except of tested ioclass should be
# put in pass-through mode
ioclass_config.add_ioclass(
ioclass_id=ioclass_config.DEFAULT_IO_CLASS_ID,
eviction_priority=ioclass_config.DEFAULT_IO_CLASS_PRIORITY,
allocation="0.00",
rule=ioclass_config.DEFAULT_IO_CLASS_RULE,
ioclass_config_path=ioclass_config_path,
)
output = TestRun.executor.run(f"mkdir -p {mountpoint}")
if output.exit_code != 0:
raise Exception(f"Failed to create mountpoint")
return cache, core
def prepare():
base_prepare()
ioclass_config.remove_ioclass_config()
cache_device = next(
filter(lambda disk: disk.disk_type in [DiskType.optane, DiskType.nand],
TestRun.dut.disks))
core_device = next(
filter(
lambda disk: disk.disk_type.value > cache_device.disk_type.value,
TestRun.dut.disks))
cache_device.create_partitions([Size(500, Unit.MebiByte)])
core_device.create_partitions([Size(1, Unit.GibiByte)])
cache_device = cache_device.partitions[0]
core_device = core_device.partitions[0]
TestRun.LOGGER.info(f"Starting cache")
cache = casadm.start_cache(cache_device,
cache_mode=CacheMode.WB,
force=True)
TestRun.LOGGER.info(f"Setting cleaning policy to NOP")
casadm.set_param_cleaning(cache_id=cache.cache_id,
policy=CleaningPolicy.nop)
TestRun.LOGGER.info(f"Adding core device")
core = casadm.add_core(cache, core_dev=core_device)
ioclass_config.create_ioclass_config(
add_default_rule=False, ioclass_config_path=ioclass_config_path)
# To make test more precise all workload except of tested ioclass should be
# put in pass-through mode
ioclass_config.add_ioclass(
ioclass_id=0,
eviction_priority=22,
allocation=False,
rule="unclassified",
ioclass_config_path=ioclass_config_path,
)
output = TestRun.executor.run(f"mkdir -p {mountpoint}")
if output.exit_code != 0:
raise Exception(f"Failed to create mountpoint")
return cache, core
def prepare():
ioclass_config.remove_ioclass_config()
cache_device = TestRun.disks['cache']
core_device = TestRun.disks['core']
cache_device.create_partitions([Size(500, Unit.MebiByte)])
core_device.create_partitions([Size(1, Unit.GibiByte)])
cache_device = cache_device.partitions[0]
core_device = core_device.partitions[0]
TestRun.LOGGER.info(f"Starting cache")
cache = casadm.start_cache(cache_device, cache_mode=CacheMode.WB, force=True)
Udev.disable()
TestRun.LOGGER.info(f"Setting cleaning policy to NOP")
casadm.set_param_cleaning(cache_id=cache.cache_id, policy=CleaningPolicy.nop)
TestRun.LOGGER.info(f"Adding core device")
core = casadm.add_core(cache, core_dev=core_device)
core.set_seq_cutoff_policy(SeqCutOffPolicy.never)
ioclass_config.create_ioclass_config(
add_default_rule=False, ioclass_config_path=ioclass_config_path
)
# To make test more precise all workload except of tested ioclass should be
# put in pass-through mode
ioclass_config.add_ioclass(
ioclass_id=0,
eviction_priority=22,
allocation=False,
rule="unclassified",
ioclass_config_path=ioclass_config_path,
)
output = TestRun.executor.run(f"mkdir -p {mountpoint}")
if output.exit_code != 0:
raise Exception(f"Failed to create mountpoint")
return cache, core
def test_ioclass_resize(cache_line_size, new_occupancy):
"""
title: Resize ioclass
description: |
Add ioclass, fill it with data, change it's size and check if new
limit is respected
pass_criteria:
- Occupancy threshold is respected
"""
with TestRun.step("Prepare CAS device"):
cache, core = prepare(cache_mode=CacheMode.WT,
cache_line_size=cache_line_size)
cache_size = cache.get_statistics().config_stats.cache_size
with TestRun.step("Disable udev"):
Udev.disable()
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
filesystem = Filesystem.xfs
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step("Prepare test dirs"):
IoclassConfig = recordclass("IoclassConfig",
"id eviction_prio max_occupancy dir_path")
io_class = IoclassConfig(2, 3, 0.10, f"{mountpoint}/A")
fs_utils.create_directory(io_class.dir_path, parents=True)
with TestRun.step("Remove old ioclass config"):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
with TestRun.step("Add default ioclasses"):
ioclass_config.add_ioclass(ioclass_id=1,
rule="metadata&done",
eviction_priority=1,
allocation="1.00",
ioclass_config_path=ioclass_config_path)
ioclass_config.add_ioclass(*str(IoClass.default(
allocation="0.00")).split(","))
with TestRun.step("Add directory for ioclass"):
ioclass_config.add_ioclass(
io_class.id,
f"directory:{io_class.dir_path}&done",
io_class.eviction_prio,
f"{io_class.max_occupancy:0.2f}",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step("Reset cache stats"):
cache.purge_cache()
cache.reset_counters()
with TestRun.step("Check initial occupancy"):
occupancy = get_io_class_occupancy(cache, io_class.id)
if occupancy.get_value() != 0:
TestRun.LOGGER.error(
f"Incorrect inital occupancy for ioclass id: {io_class.id}."
f" Expected 0, got: {occupancy}")
with TestRun.step(f"Perform IO with size equal to cache size"):
run_io_dir(f"{io_class.dir_path}/tmp_file",
int((cache_size) / Unit.Blocks4096))
with TestRun.step(
"Check if the ioclass did not exceed specified occupancy"):
actuall_occupancy = get_io_class_occupancy(cache, io_class.id)
occupancy_limit = ((io_class.max_occupancy * cache_size).align_up(
Unit.Blocks4096.get_value()).set_unit(Unit.Blocks4096))
# Divergency may be casued be rounding max occupancy
if actuall_occupancy > occupancy_limit + Size(100, Unit.Blocks4096):
TestRun.LOGGER.error(
f"Occupancy for ioclass id exceeded: {io_class.id}. "
f"Limit: {occupancy_limit}, actuall: {actuall_occupancy}")
with TestRun.step(
f"Resize ioclass from {io_class.max_occupancy*100}% to {new_occupancy}%"
" cache occupancy"):
io_class.max_occupancy = new_occupancy / 100
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
ioclass_config.add_ioclass(*str(IoClass.default(
allocation="0.00")).split(","))
ioclass_config.add_ioclass(ioclass_id=1,
rule="metadata&done",
eviction_priority=1,
allocation="1.00",
ioclass_config_path=ioclass_config_path)
ioclass_config.add_ioclass(
io_class.id,
f"directory:{io_class.dir_path}&done",
io_class.eviction_prio,
f"{io_class.max_occupancy:0.2f}",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step(f"Perform IO with size equal to cache size"):
run_io_dir(f"{io_class.dir_path}/tmp_file",
int((cache_size) / Unit.Blocks4096))
with TestRun.step(
"Check if the ioclass did not exceed specified occupancy"):
actuall_occupancy = get_io_class_occupancy(cache, io_class.id)
occupancy_limit = ((io_class.max_occupancy * cache_size).align_up(
Unit.Blocks4096.get_value()).set_unit(Unit.Blocks4096))
# Divergency may be casued be rounding max occupancy
if actuall_occupancy > occupancy_limit + Size(100, Unit.Blocks4096):
TestRun.LOGGER.error(
f"Occupancy for ioclass id exceeded: {io_class.id}. "
f"Limit: {occupancy_limit}, actuall: {actuall_occupancy}")
def test_trim_eviction(cache_mode, cache_line_size, filesystem, cleaning):
"""
title: Test verifying if trim requests do not cause eviction on CAS device.
description: |
When trim requests enabled and files are being added and removed from CAS device,
there is no eviction (no reads from cache).
pass_criteria:
- Reads from cache device are the same before and after removing test file.
"""
mount_point = "/mnt"
test_file_path = os.path.join(mount_point, "test_file")
with TestRun.step("Prepare devices."):
cache_disk = TestRun.disks['cache']
cache_disk.create_partitions([Size(1, Unit.GibiByte)])
cache_dev = cache_disk.partitions[0]
core_disk = TestRun.disks['core']
core_disk.create_partitions([Size(1, Unit.GibiByte)])
core_dev = core_disk.partitions[0]
cache_block_size = disk_utils.get_block_size(cache_disk)
with TestRun.step("Start cache on device supporting trim and add core."):
cache = casadm.start_cache(cache_dev,
cache_mode,
cache_line_size,
force=True)
cache.set_cleaning_policy(cleaning)
Udev.disable()
core = cache.add_core(core_dev)
with TestRun.step("Create filesystem on CAS device and mount it."):
core.create_filesystem(filesystem)
core.mount(mount_point, ["discard"])
with TestRun.step("Create ioclass config."):
ioclass_config.create_ioclass_config()
ioclass_config.add_ioclass(ioclass_id=1,
eviction_priority=1,
allocation="0.00",
rule=f"metadata")
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config.default_config_file_path)
with TestRun.step("Create random file using ddrescue."):
test_file = create_file_with_ddrescue(core_dev, test_file_path)
os_utils.sync()
os_utils.drop_caches()
time.sleep(ioclass_config.MAX_CLASSIFICATION_DELAY.seconds)
with TestRun.step("Remove file and create a new one."):
cache_iostats_before = cache_dev.get_io_stats()
data_reads_before = cache.get_io_class_statistics(
io_class_id=0).block_stats.cache.reads
metadata_reads_before = cache.get_io_class_statistics(
io_class_id=1).block_stats.cache.reads
test_file.remove()
os_utils.sync()
os_utils.drop_caches()
create_file_with_ddrescue(core_dev, test_file_path)
os_utils.sync()
os_utils.drop_caches()
time.sleep(ioclass_config.MAX_CLASSIFICATION_DELAY.seconds)
with TestRun.step(
"Check using iostat that reads from cache did not occur."):
cache_iostats_after = cache_dev.get_io_stats()
data_reads_after = cache.get_io_class_statistics(
io_class_id=0).block_stats.cache.reads
metadata_reads_after = cache.get_io_class_statistics(
io_class_id=1).block_stats.cache.reads
reads_before = cache_iostats_before.sectors_read
reads_after = cache_iostats_after.sectors_read
metadata_reads_diff = metadata_reads_after - metadata_reads_before
data_reads_diff = data_reads_after - data_reads_before
iostat_diff = (reads_after - reads_before) * cache_block_size
if iostat_diff > int(metadata_reads_diff) or int(data_reads_diff) > 0:
TestRun.fail(
f"Number of reads from cache before and after removing test file "
f"differs. Sectors read before: {reads_before}, sectors read after: {reads_after}."
f"Data read from cache before {data_reads_before}, after {data_reads_after}."
f"Metadata read from cache before {metadata_reads_before}, "
f"after {metadata_reads_after}.")
else:
TestRun.LOGGER.info(
"Number of reads from cache before and after removing test file is the same."
)
def test_ioclass_occuppancy_load(cache_line_size):
"""
title: Load cache with occupancy limit specified
description: |
Load cache and verify if occupancy limits are loaded correctly and if
each part has assigned apropriate number of
dirty blocks.
pass_criteria:
- Occupancy thresholds have correct values for each ioclass after load
"""
with TestRun.step("Prepare CAS device"):
cache, core = prepare(cache_mode=CacheMode.WB,
cache_line_size=cache_line_size)
cache_size = cache.get_statistics().config_stats.cache_size
with TestRun.step("Disable udev"):
Udev.disable()
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
filesystem = Filesystem.xfs
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step("Prepare test dirs"):
IoclassConfig = namedtuple("IoclassConfig",
"id eviction_prio max_occupancy dir_path")
io_classes = [
IoclassConfig(1, 3, 0.30, f"{mountpoint}/A"),
IoclassConfig(2, 3, 0.30, f"{mountpoint}/B"),
IoclassConfig(3, 3, 0.30, f"{mountpoint}/C"),
]
for io_class in io_classes:
fs_utils.create_directory(io_class.dir_path, parents=True)
with TestRun.step("Remove old ioclass config"):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
with TestRun.step("Add default ioclasses"):
ioclass_config.add_ioclass(*str(IoClass.default(
allocation="0.00")).split(","))
with TestRun.step("Add ioclasses for all dirs"):
for io_class in io_classes:
ioclass_config.add_ioclass(
io_class.id,
f"directory:{io_class.dir_path}&done",
io_class.eviction_prio,
f"{io_class.max_occupancy:0.2f}",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step("Reset cache stats"):
cache.purge_cache()
cache.reset_counters()
with TestRun.step("Check initial occupancy"):
for io_class in io_classes:
occupancy = get_io_class_occupancy(cache, io_class.id)
if occupancy.get_value() != 0:
TestRun.LOGGER.error(
f"Incorrect inital occupancy for ioclass id: {io_class.id}."
f" Expected 0, got: {occupancy}")
with TestRun.step(f"Perform IO with size equal to cache size"):
for io_class in io_classes:
run_io_dir(f"{io_class.dir_path}/tmp_file",
int((cache_size) / Unit.Blocks4096))
with TestRun.step(
"Check if the ioclass did not exceed specified occupancy"):
for io_class in io_classes:
actuall_dirty = get_io_class_dirty(cache, io_class.id)
dirty_limit = ((io_class.max_occupancy * cache_size).align_down(
Unit.Blocks4096.get_value()).set_unit(Unit.Blocks4096))
if not isclose(actuall_dirty.get_value(),
dirty_limit.get_value(),
rel_tol=0.1):
TestRun.LOGGER.error(
f"Dirty for ioclass id: {io_class.id} doesn't match expected."
f"Expected: {dirty_limit}, actuall: {actuall_dirty}")
with TestRun.step("Stop cache without flushing the data"):
original_usage_stats = {}
for io_class in io_classes:
original_usage_stats[io_class.id] = get_io_class_usage(
cache, io_class.id)
original_ioclass_list = cache.list_io_classes()
cache_disk_path = cache.cache_device.path
core.unmount()
cache.stop(no_data_flush=True)
with TestRun.step("Load cache"):
cache = casadm.start_cache(Device(cache_disk_path), load=True)
with TestRun.step(
"Check if the ioclass did not exceed specified occupancy"):
for io_class in io_classes:
actuall_dirty = get_io_class_dirty(cache, io_class.id)
dirty_limit = ((io_class.max_occupancy * cache_size).align_down(
Unit.Blocks4096.get_value()).set_unit(Unit.Blocks4096))
if not isclose(actuall_dirty.get_value(),
dirty_limit.get_value(),
rel_tol=0.1):
TestRun.LOGGER.error(
f"Dirty for ioclass id: {io_class.id} doesn't match expected."
f"Expected: {dirty_limit}, actuall: {actuall_dirty}")
with TestRun.step("Compare ioclass configs"):
ioclass_list_after_load = cache.list_io_classes()
if len(ioclass_list_after_load) != len(original_ioclass_list):
TestRun.LOGGER.error(
f"Ioclass occupancy limit doesn't match. Original list size: "
f"{len(original_ioclass_list)}, loaded list size: "
f"{len(ioclass_list_after_load)}")
original_sorted = sorted(original_ioclass_list, key=lambda k: k["id"])
loaded_sorted = sorted(ioclass_list_after_load, key=lambda k: k["id"])
for original, loaded in zip(original_sorted, loaded_sorted):
original_allocation = original["allocation"]
loaded_allocation = loaded["allocation"]
ioclass_id = original["id"]
if original_allocation != loaded_allocation:
TestRun.LOGGER.error(
f"Occupancy limit doesn't match for ioclass {ioclass_id}: "
f"Original: {original_allocation}, loaded: {loaded_allocation}"
)
with TestRun.step("Compare usage stats before and after the load"):
for io_class in io_classes:
actuall_usage_stats = get_io_class_usage(cache, io_class.id)
if original_usage_stats[io_class.id] != actuall_usage_stats:
TestRun.LOGGER.error(
f"Usage stats doesn't match for ioclass {io_class.id}. "
f"Original: {original_usage_stats[io_class.id]}, "
f"loaded: {actuall_usage_stats}")
def test_ioclass_file_name_prefix():
"""
title: Test IO classification by file name prefix.
description: Test if file name prefix classification works properly.
pass_criteria:
- No kernel bug.
- IO is classified properly based on IO class rule with file name prefix.
"""
ioclass_id = 1
cached_files = ["test", "test.txt", "test1", "test1.txt"]
not_cached_files = ["file1", "file2", "file4", "file5", "tes"]
dd_size = Size(4, Unit.KibiByte)
dd_count = 10
with TestRun.step("Prepare cache and core."):
cache, core = prepare()
with TestRun.step("Create and load IO class config."):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
# Avoid caching anything else than files with specified prefix
ioclass_config.add_ioclass(
ioclass_id=0,
eviction_priority=255,
allocation="0.00",
rule=f"unclassified",
ioclass_config_path=ioclass_config_path,
)
# Enables file with specified prefix to be cached
ioclass_config.add_ioclass(
ioclass_id=ioclass_id,
eviction_priority=1,
allocation="1.00",
rule=f"file_name_prefix:test&done",
ioclass_config_path=ioclass_config_path,
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
previous_occupancy = cache.get_occupancy()
core.create_filesystem(Filesystem.ext3)
core.mount(mountpoint)
current_occupancy = cache.get_occupancy()
if previous_occupancy.get_value() > current_occupancy.get_value():
TestRun.fail(
f"Current occupancy ({str(current_occupancy)}) is lower "
f"than before ({str(previous_occupancy)}).")
# Filesystem creation caused metadata IO which is not supposed
# to be cached
# Check if files with proper prefix are cached
with TestRun.step(f"Write files which are supposed to be cached and check "
f"if they are cached."):
for f in cached_files:
dd = (Dd().input("/dev/zero").output(f"{mountpoint}/{f}").count(
dd_count).block_size(dd_size))
dd.run()
sync()
current_occupancy = cache.get_occupancy()
expected_occupancy = previous_occupancy + (dd_size * dd_count)
if current_occupancy != expected_occupancy:
TestRun.fail(f"Current occupancy value is not valid. "
f"(Expected: {str(expected_occupancy)}, "
f"actual: {str(current_occupancy)})")
previous_occupancy = current_occupancy
with TestRun.step("Flush cache."):
cache.flush_cache()
# Check if file with improper extension is not cached
with TestRun.step(
f"Write files which are not supposed to be cached and check if "
f"they are not cached."):
for f in not_cached_files:
dd = (Dd().input("/dev/zero").output(f"{mountpoint}/{f}").count(
dd_count).block_size(dd_size))
dd.run()
sync()
current_occupancy = cache.get_occupancy()
if current_occupancy != previous_occupancy:
TestRun.fail(f"Current occupancy value is not valid. "
f"(Expected: {str(previous_occupancy)}, "
f"actual: {str(current_occupancy)})")
def test_ioclass_file_size(filesystem):
"""
title: Test IO classification by file size.
description: Test if file size classification works properly.
pass_criteria:
- No kernel bug.
- IO is classified properly based on IO class rule with file size.
"""
# File size IO class rules are configured in a way that each tested file size is unambiguously
# classified.
# Firstly write operations are tested (creation of files), secondly read operations.
base_size = Size(random.randint(50, 1000) * 2, Unit.Blocks4096)
size_to_class = {
base_size: 1,
base_size - Unit.Blocks4096: 2,
base_size + Unit.Blocks4096: 3,
base_size / 2: 4,
base_size / 2 - Unit.Blocks4096: 4,
base_size / 2 + Unit.Blocks4096: 2,
base_size * 2: 5,
base_size * 2 - Unit.Blocks4096: 3,
base_size * 2 + Unit.Blocks4096: 5,
}
with TestRun.step("Prepare cache and core."):
cache, core = prepare(default_allocation="1.00")
with TestRun.step("Prepare and load IO class config."):
load_file_size_io_classes(cache, base_size)
with TestRun.step(
f"Prepare {filesystem.name} filesystem and mount {core.path} "
f"at {mountpoint}."):
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step(
"Create files belonging to different IO classes (classification by writes)."
):
test_files = []
for size, ioclass_id in size_to_class.items():
occupancy_before = cache.get_io_class_statistics(
io_class_id=ioclass_id).usage_stats.occupancy
file_path = f"{mountpoint}/test_file_{size.get_value()}"
Dd().input("/dev/zero").output(file_path).oflag("sync").block_size(
size).count(1).run()
sync()
drop_caches(DropCachesMode.ALL)
occupancy_after = cache.get_io_class_statistics(
io_class_id=ioclass_id).usage_stats.occupancy
if occupancy_after != occupancy_before + size:
TestRun.fail("File not cached properly!\n"
f"Expected {occupancy_before + size}\n"
f"Actual {occupancy_after}")
test_files.append(File(file_path).refresh_item())
sync()
drop_caches(DropCachesMode.ALL)
with TestRun.step("Move all files to 'unclassified' IO class."):
ioclass_config.remove_ioclass_config(
ioclass_config_path=ioclass_config_path)
ioclass_config.create_ioclass_config(
add_default_rule=False, ioclass_config_path=ioclass_config_path)
ioclass_config.add_ioclass(
ioclass_id=0,
eviction_priority=22,
allocation="1.00",
rule="unclassified",
ioclass_config_path=ioclass_config_path,
)
ioclass_config.add_ioclass(
ioclass_id=6,
eviction_priority=1,
allocation="0.00",
rule=f"metadata",
ioclass_config_path=ioclass_config_path,
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
occupancy_before = cache.get_io_class_statistics(
io_class_id=0).usage_stats.occupancy
for file in test_files:
Dd().input(file.full_path).output("/dev/null").block_size(
file.size).run()
sync()
drop_caches(DropCachesMode.ALL)
occupancy_after = cache.get_io_class_statistics(
io_class_id=0).usage_stats.occupancy
occupancy_expected = occupancy_before + file.size
if occupancy_after != occupancy_expected:
TestRun.fail("File not reclassified properly!\n"
f"Expected {occupancy_expected}\n"
f"Actual {occupancy_after}")
occupancy_before = occupancy_after
sync()
drop_caches(DropCachesMode.ALL)
with TestRun.step("Restore IO class configuration."):
ioclass_config.remove_ioclass_config(
ioclass_config_path=ioclass_config_path)
ioclass_config.create_ioclass_config(
add_default_rule=False, ioclass_config_path=ioclass_config_path)
ioclass_config.add_ioclass(
ioclass_id=0,
eviction_priority=22,
allocation="1.00",
rule="unclassified",
ioclass_config_path=ioclass_config_path,
)
load_file_size_io_classes(cache, base_size)
with TestRun.step(
"Read files belonging to different IO classes (classification by reads)."
):
# CAS device should be unmounted and mounted because data can be sometimes still cached by
# OS cache so occupancy statistics will not match
core.unmount()
core.mount(mountpoint)
for file in test_files:
ioclass_id = size_to_class[file.size]
occupancy_before = cache.get_io_class_statistics(
io_class_id=ioclass_id).usage_stats.occupancy
Dd().input(file.full_path).output("/dev/null").block_size(
file.size).run()
sync()
drop_caches(DropCachesMode.ALL)
occupancy_after = cache.get_io_class_statistics(
io_class_id=ioclass_id).usage_stats.occupancy
actual_blocks = occupancy_after.get_value(Unit.Blocks4096)
expected_blocks = (occupancy_before + file.size).get_value(
Unit.Blocks4096)
if actual_blocks != expected_blocks:
TestRun.fail("File not reclassified properly!\n"
f"Expected {occupancy_before + file.size}\n"
f"Actual {occupancy_after}")
sync()
drop_caches(DropCachesMode.ALL)
def test_ioclass_occupancy_sum_cache():
"""
title: Test for ioclasses occupancy sum
description: |
Create ioclass for 3 different directories, each with different
max cache occupancy configured. Trigger IO to each ioclass and check
if sum of their Usage stats is equal to cache Usage stats.
pass_criteria:
- Max occupancy is set correctly for each ioclass
- Sum of ioclassess stats is equal to cache stats
"""
with TestRun.step("Prepare CAS device"):
cache, core = prepare()
cache_size = cache.get_statistics().config_stats.cache_size
with TestRun.step("Disable udev"):
Udev.disable()
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
filesystem = Filesystem.xfs
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step("Prepare test dirs"):
default_ioclass_id = 0
IoclassConfig = namedtuple("IoclassConfig",
"id eviction_prio max_occupancy dir_path")
io_classes = [
IoclassConfig(1, 3, 0.10, f"{mountpoint}/A"),
IoclassConfig(2, 4, 0.20, f"{mountpoint}/B"),
IoclassConfig(3, 5, 0.30, f"{mountpoint}/C"),
]
for io_class in io_classes:
fs_utils.create_directory(io_class.dir_path, parents=True)
with TestRun.step("Remove old ioclass config"):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
with TestRun.step("Add default ioclasses"):
ioclass_config.add_ioclass(*str(IoClass.default(
allocation="0.00")).split(","))
with TestRun.step("Add ioclasses for all dirs"):
for io_class in io_classes:
ioclass_config.add_ioclass(
io_class.id,
f"directory:{io_class.dir_path}&done",
io_class.eviction_prio,
f"{io_class.max_occupancy:0.2f}",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step("Purge cache"):
cache.purge_cache()
with TestRun.step("Verify stats before IO"):
usage_stats_sum = IoClassUsageStats(Size(0), Size(0), Size(0))
for i in io_classes:
usage_stats_sum += get_io_class_usage(cache, i.id)
usage_stats_sum += get_io_class_usage(cache, default_ioclass_id)
cache_stats = cache.get_statistics().usage_stats
cache_stats.free = Size(0)
if (cache_stats.occupancy != usage_stats_sum.occupancy
or cache_stats.clean != usage_stats_sum.clean
or cache_stats.dirty != usage_stats_sum.dirty):
TestRun.LOGGER.error(
"Initial cache usage stats doesn't match sum of ioclasses stats\n"
f"cache stats: {cache_stats}, sumed up stats {usage_stats_sum}\n"
f"particular stats {[get_io_class_usage(cache, i.id) for i in io_classes]}"
)
with TestRun.step(f"Trigger IO to each directory"):
for io_class in io_classes:
run_io_dir(
f"{io_class.dir_path}/tmp_file",
int((io_class.max_occupancy * cache_size) / Unit.Blocks4096),
)
with TestRun.step("Verify stats after IO"):
usage_stats_sum = IoClassUsageStats(Size(0), Size(0), Size(0))
for i in io_classes:
usage_stats_sum += get_io_class_usage(cache, i.id)
usage_stats_sum += get_io_class_usage(cache, default_ioclass_id)
cache_stats = cache.get_statistics().usage_stats
cache_stats.free = Size(0)
if (cache_stats.occupancy != usage_stats_sum.occupancy
or cache_stats.clean != usage_stats_sum.clean
or cache_stats.dirty != usage_stats_sum.dirty):
TestRun.LOGGER.error(
"Cache usage stats doesn't match sum of ioclasses stats\n"
f"cache stats: {cache_stats}, sumed up stats {usage_stats_sum}\n"
f"particular stats {[get_io_class_usage(cache, i.id) for i in io_classes]}"
)
def test_ioclass_occupancy_directory_write(io_size_multiplication, cache_mode,
cache_line_size):
"""
title: Test for max occupancy set for ioclass based on directory
description: |
Create ioclass for 3 different directories, each with different
max cache occupancy configured. Run IO against each directory and see
if occupancy limit is repected.
pass_criteria:
- Max occupancy is set correctly for each ioclass
- Each ioclass does not exceed max occupancy
"""
with TestRun.step("Prepare CAS device"):
cache, core = prepare(cache_mode=cache_mode,
cache_line_size=cache_line_size)
cache_size = cache.get_statistics().config_stats.cache_size
with TestRun.step("Disable udev"):
Udev.disable()
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
filesystem = Filesystem.xfs
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step("Prepare test dirs"):
IoclassConfig = namedtuple("IoclassConfig",
"id eviction_prio max_occupancy dir_path")
io_classes = [
IoclassConfig(1, 3, 0.10, f"{mountpoint}/A"),
IoclassConfig(2, 4, 0.20, f"{mountpoint}/B"),
IoclassConfig(3, 5, 0.30, f"{mountpoint}/C"),
]
for io_class in io_classes:
fs_utils.create_directory(io_class.dir_path, parents=True)
with TestRun.step("Remove old ioclass config"):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
with TestRun.step("Add default ioclasses"):
ioclass_config.add_ioclass(*str(IoClass.default(
allocation="0.00")).split(","))
with TestRun.step("Add ioclasses for all dirs"):
for io_class in io_classes:
ioclass_config.add_ioclass(
io_class.id,
f"directory:{io_class.dir_path}&done",
io_class.eviction_prio,
f"{io_class.max_occupancy:0.2f}",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step("Reset cache stats"):
cache.purge_cache()
cache.reset_counters()
with TestRun.step("Check initial occupancy"):
for io_class in io_classes:
occupancy = get_io_class_occupancy(cache, io_class.id)
if occupancy.get_value() != 0:
TestRun.LOGGER.error(
f"Incorrect inital occupancy for ioclass id: {io_class.id}."
f" Expected 0, got: {occupancy}")
with TestRun.step(
f"To each directory perform IO with size of {io_size_multiplication} max io_class occupancy"
):
for io_class in io_classes:
original_occupancies = {}
tmp_io_class_list = [i for i in io_classes if i != io_class]
for i in tmp_io_class_list:
original_occupancies[i.id] = get_io_class_occupancy(
cache, i.id)
io_count = get_io_count(io_class, cache_size, cache_line_size,
io_size_multiplication)
run_io_dir(f"{io_class.dir_path}/tmp_file", io_count)
actual_occupancy = get_io_class_occupancy(cache, io_class.id)
expected_occupancy = io_class.max_occupancy * cache_size
if io_size_multiplication < 1:
expected_occupancy *= io_size_multiplication
expected_occupancy = expected_occupancy.align_down(
cache_line_size.value.value)
expected_occupancy.set_unit(Unit.Blocks4096)
if not isclose(expected_occupancy.value,
actual_occupancy.value,
rel_tol=0.1):
TestRun.LOGGER.error(
f"Occupancy for ioclass {io_class.id} should be equal {expected_occupancy} "
f"but is {actual_occupancy} instead!")
for i in tmp_io_class_list:
actual_occupancy = get_io_class_occupancy(cache, i.id)
io_count = get_io_count(i, cache_size, cache_line_size,
io_size_multiplication)
if (original_occupancies[i.id] != actual_occupancy
and io_count * Unit.Blocks4096.value <
actual_occupancy.value):
TestRun.LOGGER.error(
f"Occupancy for ioclass {i.id} should not change "
f"during IO to ioclass {io_class.id}. Original value: "
f"{original_occupancies[i.id]}, actual: {actual_occupancy}"
)
with TestRun.step(
"Check if none of ioclasses did not exceed specified occupancy"):
for io_class in io_classes:
actual_occupancy = get_io_class_occupancy(cache, io_class.id)
occupancy_limit = ((io_class.max_occupancy * cache_size).align_up(
Unit.Blocks4096.get_value()).set_unit(Unit.Blocks4096))
# Divergency may be caused by rounding max occupancy
if actual_occupancy > occupancy_limit * 1.01:
TestRun.LOGGER.error(
f"Occupancy for ioclass id exceeded: {io_class.id}. "
f"Limit: {occupancy_limit}, actual: {actual_occupancy}")
def test_ioclass_stats_sum(prepare_and_cleanup):
"""Check if stats for all set ioclasses sum up to cache stats"""
cache, core = prepare()
min_ioclass_id = 1
max_ioclass_id = 11
file_size_base = Unit.KibiByte.value * 4
TestProperties.LOGGER.info("Preparing ioclass config file")
ioclass_config.create_ioclass_config(
add_default_rule=True, ioclass_config_path=ioclass_config_path
)
for i in range(min_ioclass_id, max_ioclass_id):
ioclass_config.add_ioclass(
ioclass_id=i,
eviction_priority=22,
allocation=True,
rule=f"file_size:le:{file_size_base*i}&done",
ioclass_config_path=ioclass_config_path,
)
cache.load_io_class(ioclass_config_path)
TestProperties.LOGGER.info("Generating files with particular sizes")
files_list = []
for i in range(min_ioclass_id, max_ioclass_id):
path = f"/tmp/test_file_{file_size_base*i}"
File.create_file(path)
f = File(path)
f.padding(Size(file_size_base * i, Unit.Byte))
files_list.append(f)
core.create_filesystem(Filesystem.ext4)
cache.reset_counters()
# Name of stats, which should not be compared
not_compare_stats = ["clean", "occupancy"]
ioclass_id_list = list(range(min_ioclass_id, max_ioclass_id))
# Append default ioclass id
ioclass_id_list.append(0)
TestProperties.LOGGER.info("Copying files to mounted core and stats check")
for f in files_list:
# To prevent stats pollution by filesystem requests, umount core device
# after file is copied
core.mount(mountpoint)
f.copy(mountpoint)
sync()
core.unmount()
sync()
cache_stats = cache.get_cache_statistics(
stat_filter=[StatsFilter.usage, StatsFilter.req, StatsFilter.blk]
)
for ioclass_id in ioclass_id_list:
ioclass_stats = cache.get_cache_statistics(
stat_filter=[StatsFilter.usage, StatsFilter.req, StatsFilter.blk],
io_class_id=ioclass_id,
)
for stat_name in cache_stats:
if stat_name in not_compare_stats:
continue
cache_stats[stat_name] -= ioclass_stats[stat_name]
for stat_name in cache_stats:
if stat_name in not_compare_stats:
continue
stat_val = (
cache_stats[stat_name].get_value()
if isinstance(cache_stats[stat_name], Size)
else cache_stats[stat_name]
)
assert stat_val == 0, f"{stat_name} diverged!\n"
# Test cleanup
for f in files_list:
f.remove()
def test_ioclass_usage_sum():
"""
title: Test for ioclass stats after purge
description: |
Create ioclasses for 3 different directories. Run IO against each
directory, check usage stats correctness before and after purge
pass_criteria:
- Usage stats are consistent on each test step
- Usage stats don't exceed cache size
"""
with TestRun.step("Prepare disks"):
cache, core = prepare()
cache_size = cache.get_statistics().config_stats.cache_size
with TestRun.step("Disable udev"):
Udev.disable()
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
filesystem = Filesystem.xfs
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step("Prepare test dirs"):
default_ioclass_id = 0
IoclassConfig = namedtuple("IoclassConfig",
"id eviction_prio dir_path io_size")
io_classes = [
IoclassConfig(1, 3, f"{mountpoint}/A", cache_size * 0.25),
IoclassConfig(2, 4, f"{mountpoint}/B", cache_size * 0.35),
IoclassConfig(3, 5, f"{mountpoint}/C", cache_size * 0.1),
]
for io_class in io_classes:
fs_utils.create_directory(io_class.dir_path, parents=True)
with TestRun.step("Add ioclasses for all dirs"):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(True)
for io_class in io_classes:
add_io_class(
io_class.id,
io_class.eviction_prio,
f"directory:{io_class.dir_path}&done",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
# Since default ioclass is already present in cache and no directory should be
# created, it is added to ioclasses list after setup is done
io_classes.append(
IoclassConfig(default_ioclass_id, 22, f"{mountpoint}",
cache_size * 0.2))
with TestRun.step("Verify stats of newly started cache device"):
sync()
drop_caches(DropCachesMode.ALL)
verify_ioclass_usage_stats(cache, [i.id for i in io_classes])
with TestRun.step("Trigger IO to each partition and verify stats"):
for io_class in io_classes:
run_io_dir(io_class.dir_path,
int((io_class.io_size) / Unit.Blocks4096))
verify_ioclass_usage_stats(cache, [i.id for i in io_classes])
with TestRun.step("Purge cache and verify stats"):
cache.purge_cache()
verify_ioclass_usage_stats(cache, [i.id for i in io_classes])
with TestRun.step(
"Trigger IO to each partition for the second time and verify stats"
):
for io_class in io_classes:
run_io_dir(io_class.dir_path,
int((io_class.io_size) / Unit.Blocks4096))
verify_ioclass_usage_stats(cache, [i.id for i in io_classes])
def test_ioclass_repart(cache_mode, cache_line_size,
ioclass_size_multiplicatior):
"""
title: Check whether occupancy limit is respected during repart
description: |
Create ioclass for 3 different directories, each with different max
occupancy threshold. Create 3 files classified on default ioclass.
Move files to directories created earlier and force repart by reading
theirs contents.
pass_criteria:
- Partitions are evicted in specified order
"""
with TestRun.step("Prepare CAS device"):
cache, core = prepare(cache_mode=cache_mode,
cache_line_size=cache_line_size)
cache_size = cache.get_statistics().config_stats.cache_size
with TestRun.step("Disable udev"):
Udev.disable()
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
filesystem = Filesystem.xfs
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step("Prepare test dirs"):
IoclassConfig = namedtuple("IoclassConfig",
"id eviction_prio max_occupancy dir_path")
io_classes = [
IoclassConfig(1, 3, 0.40, f"{mountpoint}/A"),
IoclassConfig(2, 4, 0.30, f"{mountpoint}/B"),
IoclassConfig(3, 5, 0.30, f"{mountpoint}/C"),
]
for io_class in io_classes:
fs_utils.create_directory(io_class.dir_path, parents=True)
with TestRun.step("Remove old ioclass config"):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
with TestRun.step("Add default ioclasses"):
ioclass_config.add_ioclass(*str(IoClass.default(
allocation="1.00")).split(","))
ioclass_config.add_ioclass(ioclass_id=5,
rule="metadata",
eviction_priority=1,
allocation="1.00",
ioclass_config_path=ioclass_config_path)
with TestRun.step("Add ioclasses for all dirs"):
for io_class in io_classes:
ioclass_config.add_ioclass(
io_class.id,
f"directory:{io_class.dir_path}&done",
io_class.eviction_prio,
f"{io_class.max_occupancy*ioclass_size_multiplicatior:0.2f}",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step("Reset cache stats"):
cache.purge_cache()
cache.reset_counters()
with TestRun.step(f"Create 3 files classified in default ioclass"):
for i, io_class in enumerate(io_classes[0:3]):
run_io_dir(
f"{mountpoint}/{i}",
int((io_class.max_occupancy * cache_size) / Unit.Blocks4096))
if not isclose(
get_io_class_occupancy(
cache, ioclass_config.DEFAULT_IO_CLASS_ID).value,
cache_size.value,
rel_tol=0.1,
):
TestRun.fail(f"Failed to populte default ioclass")
with TestRun.step("Check initial occupancy"):
for io_class in io_classes:
occupancy = get_io_class_occupancy(cache, io_class.id)
if occupancy.get_value() != 0:
TestRun.LOGGER.error(
f"Incorrect inital occupancy for ioclass id: {io_class.id}."
f" Expected 0, got: {occupancy}")
with TestRun.step(
"Force repart - move files to created directories and read theirs contents"
):
for i, io_class in enumerate(io_classes):
fs_utils.move(source=f"{mountpoint}/{i}",
destination=io_class.dir_path)
run_io_dir_read(f"{io_class.dir_path}/{i}")
with TestRun.step("Check if each ioclass reached it's occupancy limit"):
for io_class in io_classes[0:3]:
actuall_occupancy = get_io_class_occupancy(cache, io_class.id)
occupancy_limit = ((io_class.max_occupancy *
cache_size).align_down(
Unit.Blocks4096.get_value()).set_unit(
Unit.Blocks4096))
if not isclose(actuall_occupancy.value,
occupancy_limit.value,
rel_tol=0.1):
TestRun.LOGGER.error(
f"Occupancy for ioclass {io_class.id} does not match. "
f"Limit: {occupancy_limit}, actuall: {actuall_occupancy}")
def test_ioclass_occupancy_directory_read(io_size_multiplication,
cache_line_size, cache_mode):
"""
title: Test for max occupancy set for ioclass based on directory - read
description: |
Set cache mode to pass-through and create files on mounted core
device. Swtich cache to write through, and load ioclasses applaying
to different files. Read files and check if occupancy threshold is
respected.
pass_criteria:
- Max occupancy is set correctly for each ioclass
- Each ioclass does not exceed max occupancy
"""
with TestRun.step("Prepare CAS device"):
cache, core = prepare(cache_mode=cache_mode,
cache_line_size=cache_line_size)
cache_size = cache.get_statistics().config_stats.cache_size
with TestRun.step("Disable udev"):
Udev.disable()
with TestRun.step(
f"Prepare filesystem and mount {core.path} at {mountpoint}"):
filesystem = Filesystem.xfs
core.create_filesystem(filesystem)
core.mount(mountpoint)
sync()
with TestRun.step("Prepare test dirs"):
IoclassConfig = namedtuple("IoclassConfig",
"id eviction_prio max_occupancy dir_path")
io_classes = [
IoclassConfig(1, 3, 0.10, f"{mountpoint}/A"),
IoclassConfig(2, 4, 0.20, f"{mountpoint}/B"),
IoclassConfig(3, 5, 0.30, f"{mountpoint}/C"),
]
for io_class in io_classes:
fs_utils.create_directory(io_class.dir_path, parents=True)
with TestRun.step(
f"In each directory create file with size of {io_size_multiplication} "
f"max io_class occupancy for future read"):
for io_class in io_classes:
run_io_dir(
f"{io_class.dir_path}/tmp_file",
int((io_class.max_occupancy * cache_size) / Unit.Blocks4096 *
io_size_multiplication),
)
with TestRun.step("Remove old ioclass config"):
ioclass_config.remove_ioclass_config()
ioclass_config.create_ioclass_config(False)
with TestRun.step("Add default ioclasses"):
ioclass_config.add_ioclass(*str(IoClass.default(
allocation="0.00")).split(","))
with TestRun.step("Add ioclasses for all dirs"):
for io_class in io_classes:
ioclass_config.add_ioclass(
io_class.id,
f"directory:{io_class.dir_path}&done",
io_class.eviction_prio,
f"{io_class.max_occupancy:0.2f}",
)
casadm.load_io_classes(cache_id=cache.cache_id,
file=ioclass_config_path)
with TestRun.step("Reset cache stats"):
cache.purge_cache()
cache.reset_counters()
with TestRun.step("Check initial occupancy"):
for io_class in io_classes:
occupancy = get_io_class_occupancy(cache, io_class.id)
if occupancy.get_value() != 0:
TestRun.LOGGER.error(
f"Incorrect inital occupancy for ioclass id: {io_class.id}."
f" Expected 0, got: {occupancy}")
with TestRun.step(
f"Read each file and check if data was inserted to appropriate ioclass"
):
for io_class in io_classes:
original_occupacies = {}
tmp_io_class_list = [i for i in io_classes if i != io_class]
for i in tmp_io_class_list:
original_occupacies[i.id] = get_io_class_occupancy(cache, i.id)
run_io_dir_read(f"{io_class.dir_path}/tmp_file")
actuall_occupancy = get_io_class_occupancy(cache, io_class.id)
io_size = io_class.max_occupancy * cache_size
if io_size_multiplication < 1:
io_size *= io_size_multiplication
io_size.set_unit(Unit.Blocks4096)
if not isclose(io_size.value, actuall_occupancy.value,
rel_tol=0.1):
TestRun.LOGGER.error(
f"Occupancy for ioclass {i.id} should be equal {io_size} "
f"but is {actuall_occupancy} instead!")
for i in tmp_io_class_list:
actuall_occupancy = get_io_class_occupancy(cache, i.id)
if original_occupacies[i.id] != actuall_occupancy:
TestRun.LOGGER.error(
f"Occupancy for ioclass {i.id} should not change "
f"during IO to ioclass {io_class.id}. Original value: "
f"{original_occupacies[i.id]}, actuall: {actuall_occupancy}"
)
with TestRun.step(
"Check if none of ioclasses did not exceed specified occupancy"):
for io_class in io_classes:
actuall_occupancy = get_io_class_occupancy(cache, io_class.id)
occupancy_limit = ((io_class.max_occupancy * cache_size).align_up(
Unit.Blocks4096.get_value()).set_unit(Unit.Blocks4096))
# Divergency may be casued be rounding max occupancy
if actuall_occupancy > occupancy_limit + Size(
100, Unit.Blocks4096):
TestRun.LOGGER.error(
f"Occupancy for ioclass id exceeded: {io_class.id}. "
f"Limit: {occupancy_limit}, actuall: {actuall_occupancy}")