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tests: test for propagating discard reqs to cache

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Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
This commit is contained in:
Michal Mielewczyk 2022-03-17 14:05:31 +01:00
parent 30eff21e65
commit e46b732b28
1 changed files with 81 additions and 1 deletions
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82
test/functional/tests/io/trim/test_trim.py
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@ -9,7 +9,7 @@ import time
import pytest
from api.cas import casadm
from api.cas.cache_config import CacheMode, CacheModeTrait, CleaningPolicy
from api.cas.cache_config import CacheMode, CacheModeTrait, CleaningPolicy, SeqCutOffPolicy
from core.test_run import TestRun
from storage_devices.disk import DiskType, DiskTypeSet
from test_tools import fs_utils
@ -86,6 +86,86 @@ def test_trim_start_discard():
cache.stop()
@pytest.mark.require_disk("ssd1", DiskTypeSet([DiskType.optane, DiskType.nand]))
@pytest.mark.require_disk("ssd2", DiskTypeSet([DiskType.optane, DiskType.nand]))
@pytest.mark.require_plugin("power_control")
def test_trim_propagation():
"""
title: Trim request not propagated to cache device
description: |
Sending trim request to exported object discards only data. The data from cache
is invalidated but the trim request is not propagated to cache device and metadata
of other cache lines is not affected.
pass_criteria:
- No system crash.
- No discards detected on caching device
- No data corruption after power failure.
"""
with TestRun.step(f"Create partitions"):
TestRun.disks["ssd1"].create_partitions([Size(43, Unit.MegaByte)])
TestRun.disks["ssd2"].create_partitions([Size(512, Unit.KiloByte)])
cache_dev = TestRun.disks["ssd1"].partitions[0]
core_dev = TestRun.disks["ssd2"].partitions[0]
if not check_if_device_supports_trim(cache_dev):
raise Exception("Cache device doesn't support discards")
if not check_if_device_supports_trim(core_dev):
raise Exception("Core device doesn't support discards")
with TestRun.step(f"Disable udev"):
os_utils.Udev.disable()
with TestRun.step(f"Prepare cache instance in WB with one core"):
cache = casadm.start_cache(cache_dev, CacheMode.WB, force=True)
core = cache.add_core(core_dev)
cache.set_cleaning_policy(CleaningPolicy.nop)
cache.set_seq_cutoff_policy(SeqCutOffPolicy.never)
cache.purge_cache()
with TestRun.step(f"Fill exported object with dirty data"):
core_size_4k = core.get_statistics().config_stats.core_size.get_value(Unit.Blocks4096)
core_size_4k = int(core_size_4k)
cas_fio = write_pattern(core.path)
cas_fio.verification_with_pattern("0xdeadbeef")
cas_fio.run()
dirty_4k = cache.get_statistics().usage_stats.dirty.get_value(Unit.Blocks4096)
if dirty_4k != core_size_4k:
TestRun.fail(
f"Failed to fill cache. Expected dirty blocks: {core_size_4k}, "
f"actual value {dirty_4k}"
)
with TestRun.step(f"Discard 4k of data on exported object"):
TestRun.executor.run_expect_success(f"blkdiscard {core.path} --length 4096 --offset 0")
old_occupancy = cache.get_statistics().usage_stats.occupancy.get_value(Unit.Blocks4096)
with TestRun.step("Power cycle"):
power_control = TestRun.plugin_manager.get_plugin("power_control")
power_control.power_cycle()
os_utils.Udev.disable()
with TestRun.step("Load cache"):
cache = casadm.start_cache(cache_dev, load=True)
with TestRun.step("Check if occupancy after dirty shutdown is correct"):
new_occupancy = cache.get_statistics().usage_stats.occupancy.get_value(Unit.Blocks4096)
if new_occupancy != old_occupancy:
TestRun.LOGGER.error(
f"Expected occupancy after dirty shutdown: {old_occupancy}. "
f"Actuall: {new_occupancy})"
)
with TestRun.step("Verify data after dirty shutdown"):
cas_fio.read_write(ReadWrite.read)
cas_fio.offset(Unit.Blocks4096)
cas_fio.run()
@pytest.mark.parametrizex("cache_mode", CacheMode.with_traits(CacheModeTrait.InsertWrite))
@pytest.mark.parametrizex("filesystem", Filesystem)
@pytest.mark.parametrizex("cleaning_policy", CleaningPolicy)