409 lines
16 KiB
Python
409 lines
16 KiB
Python
#
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# Copyright(c) 2020-2022 Intel Corporation
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# SPDX-License-Identifier: BSD-3-Clause
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#
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from collections import namedtuple
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from math import isclose
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import pytest
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from api.cas import ioclass_config, casadm
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from api.cas.cache_config import CacheMode, CacheLineSize
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from api.cas.ioclass_config import IoClass, default_config_file_path
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from api.cas.statistics import IoClassUsageStats
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from core.test_run import TestRun
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from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
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from test_tools import fs_utils
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from test_tools.disk_utils import Filesystem
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from test_utils.os_utils import sync, Udev
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from test_utils.size import Unit, Size
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from tests.io_class.io_class_common import (
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prepare,
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mountpoint,
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run_io_dir,
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get_io_class_occupancy,
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run_io_dir_read,
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get_io_class_usage,
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)
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@pytest.mark.os_dependent
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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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@pytest.mark.parametrize("io_size_multiplication", [0.5, 2])
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@pytest.mark.parametrize("cache_mode", [CacheMode.WT, CacheMode.WB])
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def test_io_class_occupancy_directory_write(io_size_multiplication, cache_mode):
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"""
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title: Test for max occupancy set for ioclass based on directory
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description: |
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Create ioclass for 3 different directories, each with different
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max cache occupancy configured. Run IO against each directory and see
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if occupancy limit is respected.
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pass_criteria:
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- Max occupancy is set correctly for each ioclass
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- Each ioclass does not exceed max occupancy
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"""
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cache_line_size = CacheLineSize.LINE_64KiB
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with TestRun.step("Prepare CAS device"):
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cache, core = prepare(cache_mode=cache_mode, cache_line_size=cache_line_size)
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cache_size = cache.get_statistics().config_stats.cache_size
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with TestRun.step("Disable udev"):
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Udev.disable()
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with TestRun.step(f"Prepare filesystem and mount {core.path} at {mountpoint}"):
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filesystem = Filesystem.xfs
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core.create_filesystem(filesystem)
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core.mount(mountpoint)
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sync()
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with TestRun.step("Prepare test dirs"):
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IoclassConfig = namedtuple("IoclassConfig", "id eviction_prio max_occupancy dir_path")
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io_classes = [
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IoclassConfig(1, 3, 0.10, f"{mountpoint}/A"),
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IoclassConfig(2, 4, 0.20, f"{mountpoint}/B"),
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IoclassConfig(3, 5, 0.30, f"{mountpoint}/C"),
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]
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for io_class in io_classes:
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fs_utils.create_directory(io_class.dir_path, parents=True)
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with TestRun.step("Remove old ioclass config"):
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ioclass_config.remove_ioclass_config()
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ioclass_config.create_ioclass_config(False)
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with TestRun.step("Add default io classes"):
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ioclass_config.add_ioclass(*str(IoClass.default(allocation="0.00")).split(","))
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with TestRun.step("Add io classes for all dirs"):
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for io_class in io_classes:
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ioclass_config.add_ioclass(
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io_class.id,
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f"directory:{io_class.dir_path}&done",
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io_class.eviction_prio,
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f"{io_class.max_occupancy:0.2f}",
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)
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casadm.load_io_classes(cache_id=cache.cache_id, file=default_config_file_path)
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with TestRun.step("Reset cache stats"):
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cache.purge_cache()
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cache.reset_counters()
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with TestRun.step("Check initial occupancy"):
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for io_class in io_classes:
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occupancy = get_io_class_occupancy(cache, io_class.id)
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if occupancy.get_value() != 0:
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TestRun.LOGGER.error(
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f"Incorrect inital occupancy for ioclass id: {io_class.id}."
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f" Expected 0, got: {occupancy}"
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)
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with TestRun.step(
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f"To each directory perform IO"
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f" with size of {io_size_multiplication} max io_class occupancy"
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):
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for io_class in io_classes:
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original_occupancies = {}
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tmp_io_class_list = [i for i in io_classes if i != io_class]
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for i in tmp_io_class_list:
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original_occupancies[i.id] = get_io_class_occupancy(cache, i.id)
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io_count = get_io_count(io_class, cache_size, cache_line_size, io_size_multiplication)
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run_io_dir(f"{io_class.dir_path}/tmp_file", io_count)
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actual_occupancy = get_io_class_occupancy(cache, io_class.id)
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expected_occupancy = io_class.max_occupancy * cache_size
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if io_size_multiplication < 1:
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expected_occupancy *= io_size_multiplication
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expected_occupancy = expected_occupancy.align_down(cache_line_size.value.value)
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expected_occupancy.set_unit(Unit.Blocks4096)
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if not isclose(expected_occupancy.value, actual_occupancy.value, rel_tol=0.1):
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TestRun.LOGGER.error(
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f"Occupancy for ioclass {io_class.id} should be equal {expected_occupancy} "
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f"but is {actual_occupancy} instead!"
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)
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for i in tmp_io_class_list:
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actual_occupancy = get_io_class_occupancy(cache, i.id)
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io_count = get_io_count(i, cache_size, cache_line_size, io_size_multiplication)
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if (
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original_occupancies[i.id] != actual_occupancy
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and io_count * Unit.Blocks4096.get_value() < actual_occupancy.value
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):
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TestRun.LOGGER.error(
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f"Occupancy for ioclass {i.id} should not change "
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f"during IO to ioclass {io_class.id}. Original value: "
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f"{original_occupancies[i.id]}, actual: {actual_occupancy}"
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)
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with TestRun.step("Check if none of ioclasses did not exceed specified occupancy"):
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for io_class in io_classes:
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actual_occupancy = get_io_class_occupancy(cache, io_class.id)
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occupancy_limit = (
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(io_class.max_occupancy * cache_size)
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.align_up(Unit.Blocks4096.get_value())
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.set_unit(Unit.Blocks4096)
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)
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# Divergence may be caused by rounding max occupancy
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if actual_occupancy > occupancy_limit * 1.01:
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TestRun.LOGGER.error(
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f"Occupancy for ioclass id exceeded: {io_class.id}. "
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f"Limit: {occupancy_limit}, actual: {actual_occupancy}"
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)
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@pytest.mark.os_dependent
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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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@pytest.mark.parametrize("io_size_multiplication", [0.5, 2])
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def test_io_class_occupancy_directory_read(io_size_multiplication):
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"""
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title: Test for max occupancy set for ioclass based on directory - read
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description: |
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Set cache mode to pass-through and create files on mounted core device.
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Switch cache to write through, and load io classes applying to different files.
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Read files and check if occupancy threshold is respected.
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pass_criteria:
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- Max occupancy is set correctly for each ioclass
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- Each ioclass does not exceed max occupancy
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"""
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cache_line_size = CacheLineSize.LINE_64KiB
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cache_mode = CacheMode.WB
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with TestRun.step("Prepare CAS device"):
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cache, core = prepare(cache_mode=cache_mode, cache_line_size=cache_line_size)
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cache_size = cache.get_statistics().config_stats.cache_size
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with TestRun.step("Disable udev"):
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Udev.disable()
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with TestRun.step(f"Prepare filesystem and mount {core.path} at {mountpoint}"):
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filesystem = Filesystem.xfs
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core.create_filesystem(filesystem)
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core.mount(mountpoint)
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sync()
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with TestRun.step("Prepare test dirs"):
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IoclassConfig = namedtuple("IoclassConfig", "id eviction_prio max_occupancy dir_path")
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io_classes = [
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IoclassConfig(1, 3, 0.10, f"{mountpoint}/A"),
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IoclassConfig(2, 4, 0.20, f"{mountpoint}/B"),
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IoclassConfig(3, 5, 0.30, f"{mountpoint}/C"),
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]
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for io_class in io_classes:
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fs_utils.create_directory(io_class.dir_path, parents=True)
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with TestRun.step(
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f"In each directory create file with size of {io_size_multiplication} "
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f"max io_class occupancy for future read"
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):
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for io_class in io_classes:
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io_size = get_io_count(io_class, cache_size, cache_line_size, io_size_multiplication)
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run_io_dir(f"{io_class.dir_path}/tmp_file", io_size)
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with TestRun.step("Remove old ioclass config"):
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ioclass_config.remove_ioclass_config()
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ioclass_config.create_ioclass_config(False)
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with TestRun.step("Add default io classes"):
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ioclass_config.add_ioclass(*str(IoClass.default(allocation="0.00")).split(","))
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with TestRun.step("Add io classes for all dirs"):
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for io_class in io_classes:
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ioclass_config.add_ioclass(
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io_class.id,
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f"directory:{io_class.dir_path}&done",
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io_class.eviction_prio,
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f"{io_class.max_occupancy:0.2f}",
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)
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casadm.load_io_classes(cache_id=cache.cache_id, file=default_config_file_path)
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with TestRun.step("Reset cache stats"):
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cache.purge_cache()
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cache.reset_counters()
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with TestRun.step("Check initial occupancy"):
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for io_class in io_classes:
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occupancy = get_io_class_occupancy(cache, io_class.id)
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if occupancy.get_value() != 0:
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TestRun.LOGGER.error(
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f"Incorrect initial occupancy for ioclass id: {io_class.id}."
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f" Expected 0, got: {occupancy}"
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)
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with TestRun.step(f"Read each file and check if data was inserted to appropriate ioclass"):
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for io_class in io_classes:
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original_occupancies = {}
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tmp_io_class_list = [i for i in io_classes if i != io_class]
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for i in tmp_io_class_list:
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original_occupancies[i.id] = get_io_class_occupancy(cache, i.id)
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run_io_dir_read(f"{io_class.dir_path}/tmp_file")
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actual_occupancy = get_io_class_occupancy(cache, io_class.id)
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expected_occupancy = io_class.max_occupancy * cache_size
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if io_size_multiplication < 1:
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expected_occupancy *= io_size_multiplication
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expected_occupancy.set_unit(Unit.Blocks4096)
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if not isclose(expected_occupancy.value, actual_occupancy.value, rel_tol=0.1):
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TestRun.LOGGER.error(
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f"Occupancy for ioclass {i.id} should be equal {expected_occupancy} "
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f"but is {actual_occupancy} instead!"
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)
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for i in tmp_io_class_list:
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actual_occupancy = get_io_class_occupancy(cache, i.id)
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io_count = get_io_count(i, cache_size, cache_line_size, io_size_multiplication)
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if (
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original_occupancies[i.id] != actual_occupancy
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and io_count * Unit.Blocks4096.get_value() < actual_occupancy.value
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):
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TestRun.LOGGER.error(
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f"Occupancy for ioclass {i.id} should not change "
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f"during IO to ioclass {io_class.id}. Original value: "
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f"{original_occupancies[i.id]}, actual: {actual_occupancy}"
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)
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with TestRun.step("Check if none of ioclasses did not exceed specified occupancy"):
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for io_class in io_classes:
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actual_occupancy = get_io_class_occupancy(cache, io_class.id)
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occupancy_limit = (
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(io_class.max_occupancy * cache_size)
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.align_up(Unit.Blocks4096.get_value())
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.set_unit(Unit.Blocks4096)
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)
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# Divergence may be caused by rounding max occupancy
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if actual_occupancy > occupancy_limit * 1.01:
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TestRun.LOGGER.error(
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f"Occupancy for ioclass id exceeded: {io_class.id}. "
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f"Limit: {occupancy_limit}, actual: {actual_occupancy}"
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)
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@pytest.mark.os_dependent
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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_ioclass_occupancy_sum_cache():
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"""
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title: Test for io classes occupancy sum
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description: |
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Create ioclass for 3 different directories, each with different
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max cache occupancy configured. Trigger IO to each ioclass and check
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if sum of their Usage stats is equal to cache Usage stats.
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pass_criteria:
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- Max occupancy is set correctly for each ioclass
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- Sum of io classes stats is equal to cache stats
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"""
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with TestRun.step("Prepare CAS device"):
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cache, core = prepare()
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cache_size = cache.get_statistics().config_stats.cache_size
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with TestRun.step("Disable udev"):
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Udev.disable()
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with TestRun.step(f"Prepare filesystem and mount {core.path} at {mountpoint}"):
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filesystem = Filesystem.xfs
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core.create_filesystem(filesystem)
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core.mount(mountpoint)
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sync()
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with TestRun.step("Prepare test dirs"):
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default_ioclass_id = 0
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IoclassConfig = namedtuple("IoclassConfig", "id eviction_prio max_occupancy dir_path")
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io_classes = [
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IoclassConfig(1, 3, 0.10, f"{mountpoint}/A"),
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IoclassConfig(2, 4, 0.20, f"{mountpoint}/B"),
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IoclassConfig(3, 5, 0.30, f"{mountpoint}/C"),
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]
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for io_class in io_classes:
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fs_utils.create_directory(io_class.dir_path, parents=True)
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with TestRun.step("Remove old ioclass config"):
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ioclass_config.remove_ioclass_config()
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ioclass_config.create_ioclass_config(False)
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with TestRun.step("Add default io classes"):
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ioclass_config.add_ioclass(*str(IoClass.default(allocation="0.00")).split(","))
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with TestRun.step("Add ioclasses for all dirs"):
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for io_class in io_classes:
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ioclass_config.add_ioclass(
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io_class.id,
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f"directory:{io_class.dir_path}&done",
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io_class.eviction_prio,
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f"{io_class.max_occupancy:0.2f}",
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)
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casadm.load_io_classes(cache_id=cache.cache_id, file=default_config_file_path)
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with TestRun.step("Purge cache"):
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cache.purge_cache()
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with TestRun.step("Verify stats before IO"):
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usage_stats_sum = IoClassUsageStats(Size(0), Size(0), Size(0))
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for i in io_classes:
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usage_stats_sum += get_io_class_usage(cache, i.id)
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usage_stats_sum += get_io_class_usage(cache, default_ioclass_id)
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cache_stats = cache.get_statistics().usage_stats
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cache_stats.free = Size(0)
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if (
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cache_stats.occupancy != usage_stats_sum.occupancy
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or cache_stats.clean != usage_stats_sum.clean
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or cache_stats.dirty != usage_stats_sum.dirty
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):
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TestRun.LOGGER.error(
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"Initial cache usage stats doesn't match sum of ioclasses stats\n"
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f"cache stats: {cache_stats}, sumed up stats {usage_stats_sum}\n"
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f"particular stats {[get_io_class_usage(cache, i.id) for i in io_classes]}"
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)
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with TestRun.step(f"Trigger IO to each directory"):
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for io_class in io_classes:
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run_io_dir(
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f"{io_class.dir_path}/tmp_file",
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int((io_class.max_occupancy * cache_size) / Unit.Blocks4096.get_value()),
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)
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with TestRun.step("Verify stats after IO"):
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usage_stats_sum = IoClassUsageStats(Size(0), Size(0), Size(0))
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for i in io_classes:
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usage_stats_sum += get_io_class_usage(cache, i.id)
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usage_stats_sum += get_io_class_usage(cache, default_ioclass_id)
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cache_stats = cache.get_statistics().usage_stats
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cache_stats.free = Size(0)
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if (
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cache_stats.occupancy != usage_stats_sum.occupancy
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or cache_stats.clean != usage_stats_sum.clean
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or cache_stats.dirty != usage_stats_sum.dirty
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):
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TestRun.LOGGER.error(
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"Cache usage stats doesn't match sum of ioclasses stats\n"
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f"cache stats: {cache_stats}, sumed up stats {usage_stats_sum}\n"
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f"particular stats {[get_io_class_usage(cache, i.id) for i in io_classes]}"
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)
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def get_io_count(io_class, cache_size, cls, io_size_multiplication):
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io_count = int((io_class.max_occupancy * cache_size) / Unit.Blocks4096 * io_size_multiplication)
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# io size needs to be aligned to cache line size
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io_count -= int(io_count % (cls.value / Unit.Blocks4096))
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return io_count
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