307 lines
12 KiB
Python
307 lines
12 KiB
Python
#
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# Copyright(c) 2020-2022 Intel Corporation
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# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
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# SPDX-License-Identifier: BSD-3-Clause
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#
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import posixpath
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import random
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from time import sleep
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import pytest
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from api.cas import casadm
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from api.cas.cache_config import (
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CacheMode,
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SeqCutOffPolicy,
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CacheModeTrait,
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CleaningPolicy,
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)
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from api.cas.casadm_params import StatsFilter
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from core.test_run_utils import TestRun
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from storage_devices.disk import DiskTypeSet, DiskTypeLowerThan, DiskType
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from test_tools.dd import Dd
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from test_tools.fs_tools import Filesystem
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from test_tools.fio.fio import Fio
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from test_tools.fio.fio_param import IoEngine, ReadWrite
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from test_tools.udev import Udev
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from connection.utils.output import CmdException
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from type_def.size import Size, Unit
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random_thresholds = random.sample(range(1028, 1024**2, 4), 3)
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random_stream_numbers = random.sample(range(2, 128), 3)
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mount_point = "/mnt"
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@pytest.mark.os_dependent
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@pytest.mark.parametrizex("streams_number", [1, 128] + random_stream_numbers)
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@pytest.mark.parametrizex(
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"threshold",
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[Size(1, Unit.MebiByte), Size(1, Unit.GibiByte)]
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+ [Size(x, Unit.KibiByte) for x in random_thresholds],
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)
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@pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
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@pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
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def test_multistream_seq_cutoff_functional(streams_number, threshold):
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"""
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title: Functional test for multistream sequential cutoff
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description: |
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Testing if amount of data written to cache and core is correct after running sequential
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writes from multiple streams with different sequential cut-off thresholds.
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pass_criteria:
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- Amount of data written to cache is equal to amount set with sequential cutoff threshold
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- Amount of data written in pass-through is equal to io size run after reaching the
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sequential cutoff threshold
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"""
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with TestRun.step("Disable udev"):
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Udev.disable()
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with TestRun.step(f"Start cache in Write-Back cache mode"):
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cache_disk = TestRun.disks["cache"]
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core_disk = TestRun.disks["core"]
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cache = casadm.start_cache(cache_disk, CacheMode.WB, force=True)
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cache.set_cleaning_policy(CleaningPolicy.nop)
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core = cache.add_core(core_disk)
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with TestRun.step(
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f"Set seq-cutoff policy to always, threshold to {threshold} "
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f"and reset statistics counters"
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):
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core.set_seq_cutoff_policy(SeqCutOffPolicy.always)
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core.set_seq_cutoff_threshold(threshold)
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core.set_seq_cutoff_promotion_count(1)
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core.reset_counters()
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with TestRun.step(
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f"Run {streams_number} I/O streams with amount of sequential writes equal to "
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f"seq-cutoff threshold value minus one 4k block"
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):
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kib_between_streams = 100
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range_step = int(threshold.get_value(Unit.KibiByte)) + kib_between_streams
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max_range_offset = streams_number * range_step
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offsets = [o for o in range(0, max_range_offset, range_step)]
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core_statistics_before = core.get_statistics([StatsFilter.req, StatsFilter.blk])
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for i in TestRun.iteration(range(0, len(offsets))):
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TestRun.LOGGER.info(f"Statistics before I/O:\n{core_statistics_before}")
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offset = Size(offsets[i], Unit.KibiByte)
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run_dd(
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core.path,
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count=int(threshold.get_value(Unit.Blocks4096) - 1),
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seek=int(offset.get_value(Unit.Blocks4096)),
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)
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core_statistics_after = core.get_statistics([StatsFilter.req, StatsFilter.blk])
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check_statistics(
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core_statistics_before,
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core_statistics_after,
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expected_pt_writes=0,
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expected_writes_to_cache=(threshold - Size(1, Unit.Blocks4096)),
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)
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core_statistics_before = core_statistics_after
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with TestRun.step(
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"Write random number of 4k block requests to each stream and check if all "
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"writes were sent in pass-through"
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):
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core_statistics_before = core.get_statistics([StatsFilter.req, StatsFilter.blk])
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random.shuffle(offsets)
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for i in TestRun.iteration(range(0, len(offsets))):
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TestRun.LOGGER.info(f"Statistics before second I/O:\n{core_statistics_before}")
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additional_4k_blocks_writes = random.randint(1, kib_between_streams // 4)
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offset = Size(offsets[i], Unit.KibiByte)
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run_dd(
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core.path,
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count=additional_4k_blocks_writes,
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seek=int(
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offset.get_value(Unit.Blocks4096) + threshold.get_value(Unit.Blocks4096) - 1
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),
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)
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core_statistics_after = core.get_statistics([StatsFilter.req, StatsFilter.blk])
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check_statistics(
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core_statistics_before,
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core_statistics_after,
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expected_pt_writes=additional_4k_blocks_writes,
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expected_writes_to_cache=Size.zero(),
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)
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core_statistics_before = core_statistics_after
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@pytest.mark.os_dependent
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@pytest.mark.parametrizex("streams_seq_rand", [(64, 64), (64, 192)])
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@pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
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@pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
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def test_multistream_seq_cutoff_stress_raw(streams_seq_rand):
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"""
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title: Stress test for multistream sequential cutoff on raw device
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description: |
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Testing the stability of a system when there are multiple sequential and random I/O streams
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running against the raw exported object with the sequential cutoff policy set to always and
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the sequential cutoff threshold set to a value which can be reached by
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sequential I/O streams.
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pass_criteria:
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- No system crash
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"""
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with TestRun.step("Prepare cache and core devices"):
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cache_disk = TestRun.disks["cache"]
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core_disk = TestRun.disks["core"]
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cache_disk.create_partitions([Size(1.5, Unit.GibiByte)])
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with TestRun.step(f"Disable udev"):
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Udev.disable()
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with TestRun.step(f"Start cache in Write-Back mode and add core"):
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cache = casadm.start_cache(
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cache_dev=cache_disk.partitions[0], cache_mode=CacheMode.WB, force=True
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)
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core = cache.add_core(core_disk)
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with TestRun.step(f"Set seq-cutoff policy to always and threshold to 512KiB"):
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core.set_seq_cutoff_policy(SeqCutOffPolicy.always)
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core.set_seq_cutoff_threshold(Size(512, Unit.KibiByte))
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with TestRun.step("Reset core statistics counters"):
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core.reset_counters()
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with TestRun.step("Run fio on core device"):
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stream_size = min(core_disk.size / 256, Size(256, Unit.MebiByte))
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sequential_streams = streams_seq_rand[0]
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random_streams = streams_seq_rand[1]
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fio = (
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Fio()
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.create_command()
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.io_engine(IoEngine.libaio)
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.block_size(Size(1, Unit.Blocks4096))
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.direct()
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.offset_increment(stream_size)
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)
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for i in range(0, sequential_streams + random_streams):
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fio_job = fio.add_job(job_name=f"stream_{i}")
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fio_job.size(stream_size)
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fio_job.target(core.path)
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if i < sequential_streams:
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fio_job.read_write(ReadWrite.write)
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else:
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fio_job.read_write(ReadWrite.randwrite)
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fio_pid = fio.run_in_background()
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while TestRun.executor.check_if_process_exists(fio_pid):
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sleep(5)
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TestRun.LOGGER.info(f"{core.get_statistics()}")
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@pytest.mark.os_dependent
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@pytest.mark.parametrizex("streams_seq_rand", [(64, 64), (64, 192)])
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@pytest.mark.parametrizex("filesystem", Filesystem)
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@pytest.mark.parametrizex("cache_mode", CacheMode.with_traits(CacheModeTrait.LazyWrites))
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@pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
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@pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
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def test_multistream_seq_cutoff_stress_fs(streams_seq_rand, filesystem, cache_mode):
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"""
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title: Stress test for multistream sequential cutoff on the device with a filesystem
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description: |
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Testing the stability of a system when there are multiple sequential and random I/O streams
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running against the exported object with a filesystem when the sequential cutoff policy is
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set to always and the sequential cutoff threshold is configured to a value that can be
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achieved by sequential I/O streams.
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pass_criteria:
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- No system crash
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"""
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with TestRun.step("Disable udev"):
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Udev.disable()
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with TestRun.step("Prepare cache and core devices"):
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cache_disk = TestRun.disks["cache"]
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core_disk = TestRun.disks["core"]
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with TestRun.step("Create filesystem on core device"):
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core_disk.create_filesystem(filesystem)
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with TestRun.step("Start cache and add core"):
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cache = casadm.start_cache(cache_dev=cache_disk, cache_mode=cache_mode, force=True)
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core = cache.add_core(core_dev=core_disk)
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with TestRun.step("Mount core"):
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core.mount(mount_point=mount_point)
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with TestRun.step("Set sequential cutoff policy to always and threshold to 20MiB"):
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core.set_seq_cutoff_policy(policy=SeqCutOffPolicy.always)
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core.set_seq_cutoff_threshold(threshold=Size(20, Unit.MebiByte))
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with TestRun.step("Reset core statistic counters"):
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core.reset_counters()
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with TestRun.step("Run fio on exported object"):
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sequential_streams = streams_seq_rand[0]
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random_streams = streams_seq_rand[1]
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stream_size = core_disk.size / 256
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fio = (
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Fio()
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.create_command()
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.io_engine(IoEngine.libaio)
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.block_size(Size(1, Unit.Blocks4096))
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.direct()
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.offset_increment(stream_size)
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)
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for i in range(0, sequential_streams + random_streams):
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fio_job = fio.add_job(job_name=f"stream_{i}")
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fio_job.size(stream_size)
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fio_job.target(posixpath.join(mount_point, f"file_{i}"))
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if i < sequential_streams:
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fio_job.read_write(ReadWrite.write)
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else:
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fio_job.read_write(ReadWrite.randwrite)
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pid = fio.run_in_background()
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while TestRun.executor.check_if_process_exists(pid):
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sleep(5)
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TestRun.LOGGER.info(f"{core.get_statistics()}")
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def run_dd(target_path, count, seek):
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dd = (
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Dd()
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.input("/dev/zero")
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.output(target_path)
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.block_size(Size(1, Unit.Blocks4096))
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.count(count)
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.oflag("direct")
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.seek(seek)
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)
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TestRun.LOGGER.info(f"dd command:\n{dd}")
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output = dd.run()
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if output.exit_code != 0:
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raise CmdException("Error during I/O", output)
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def check_statistics(stats_before, stats_after, expected_pt_writes, expected_writes_to_cache):
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TestRun.LOGGER.info(f"Statistics after I/O:\n{stats_after}")
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writes_to_cache_before = stats_before.block_stats.cache.writes
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writes_to_cache_after = stats_after.block_stats.cache.writes
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pt_writes_before = stats_before.request_stats.pass_through_writes
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pt_writes_after = stats_after.request_stats.pass_through_writes
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pt_writes = pt_writes_after - pt_writes_before
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writes_to_cache = writes_to_cache_after - writes_to_cache_before
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if pt_writes != expected_pt_writes:
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TestRun.LOGGER.error(
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f"Expected pass-through writes: {expected_pt_writes}\n"
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f"Actual pass-through writes: {pt_writes}"
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)
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if writes_to_cache != expected_writes_to_cache:
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TestRun.LOGGER.error(
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f"Expected writes to cache: {expected_writes_to_cache.set_unit(Unit.Blocks4096)}\n"
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f"Actual writes to cache: {writes_to_cache.set_unit(Unit.Blocks4096)}"
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)
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