68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
#
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# Copyright(c) 2019-2020 Intel Corporation
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# SPDX-License-Identifier: BSD-3-Clause-Clear
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#
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from api.cas import casadm
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from api.cas import ioclass_config
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from api.cas.cache_config import (
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CacheMode,
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CleaningPolicy,
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SeqCutOffPolicy,
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CacheLineSize,
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)
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from core.test_run import TestRun
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from test_utils.os_utils import Udev
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from test_utils.size import Size, Unit
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ioclass_config_path = "/tmp/opencas_ioclass.conf"
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mountpoint = "/tmp/cas1-1"
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def prepare(
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cache_size=Size(500, Unit.MebiByte),
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core_size=Size(10, Unit.GibiByte),
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cache_mode=CacheMode.WB,
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cache_line_size=CacheLineSize.LINE_4KiB,
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):
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ioclass_config.remove_ioclass_config()
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cache_device = TestRun.disks["cache"]
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core_device = TestRun.disks["core"]
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cache_device.create_partitions([cache_size])
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core_device.create_partitions([core_size])
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cache_device = cache_device.partitions[0]
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core_device = core_device.partitions[0]
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TestRun.LOGGER.info(f"Starting cache")
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cache = casadm.start_cache(
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cache_device, cache_mode=cache_mode, cache_line_size=cache_line_size, force=True
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)
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Udev.disable()
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TestRun.LOGGER.info(f"Setting cleaning policy to NOP")
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casadm.set_param_cleaning(cache_id=cache.cache_id, policy=CleaningPolicy.nop)
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TestRun.LOGGER.info(f"Adding core device")
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core = casadm.add_core(cache, core_dev=core_device)
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TestRun.LOGGER.info(f"Setting seq cutoff policy to never")
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core.set_seq_cutoff_policy(SeqCutOffPolicy.never)
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ioclass_config.create_ioclass_config(
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add_default_rule=False, ioclass_config_path=ioclass_config_path
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)
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# To make test more precise all workload except of tested ioclass should be
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# put in pass-through mode
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ioclass_config.add_ioclass(
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ioclass_id=0,
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eviction_priority=22,
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allocation=False,
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rule="unclassified",
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ioclass_config_path=ioclass_config_path,
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)
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output = TestRun.executor.run(f"mkdir -p {mountpoint}")
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if output.exit_code != 0:
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raise Exception(f"Failed to create mountpoint")
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return cache, core
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