Merge pull request #349 from imjfckm/alru-noidle-test

Allow activity threshold and wake up time in ALRU set to 0s

ocf

@@ -1 +1 @@
-Subproject commit 49d8f10953250dea64af97bf37e17b9aa72dbfb8
+Subproject commit b08514c2db15fba4bb3bcc1a61d095f190a2ce6a

test/functional/api/cas/cache.py

@@ -1,5 +1,5 @@
 #
-# Copyright(c) 2019 Intel Corporation
+# Copyright(c) 2019-2020 Intel Corporation
 # SPDX-License-Identifier: BSD-3-Clause-Clear
 #
 
@@ -164,15 +164,16 @@ class Cache:
                                              if acp_params.flush_max_buffers else None)
 
     def set_params_alru(self, alru_params: FlushParametersAlru):
-        return casadm.set_param_cleaning_alru(self.cache_id,
-                                              int(alru_params.wake_up_time.total_seconds())
-                                              if alru_params.wake_up_time else None,
-                                              int(alru_params.staleness_time.total_seconds())
-                                              if alru_params.staleness_time else None,
-                                              alru_params.flush_max_buffers
-                                              if alru_params.flush_max_buffers else None,
-                                              alru_params.activity_threshold.total_milliseconds()
-                                              if alru_params.activity_threshold else None)
+        return casadm.set_param_cleaning_alru(
+            self.cache_id,
+            int(alru_params.wake_up_time.total_seconds())
+            if alru_params.wake_up_time is not None else None,
+            int(alru_params.staleness_time.total_seconds())
+            if alru_params.staleness_time is not None else None,
+            alru_params.flush_max_buffers
+            if alru_params.flush_max_buffers is not None else None,
+            alru_params.activity_threshold.total_milliseconds()
+            if alru_params.activity_threshold is not None else None)
 
     def get_cache_config(self):
         return CacheConfig(self.get_cache_line_size(),

test/functional/api/cas/cache_config.py

@@ -158,10 +158,10 @@ class FlushParametersAlru:
     @staticmethod
     def alru_params_range():
         alru_params = FlushParametersAlru()
-        alru_params.activity_threshold = (500, 1000000)
+        alru_params.activity_threshold = (0, 1000000)
         alru_params.flush_max_buffers = (1, 10000)
         alru_params.staleness_time = (1, 3600)
-        alru_params.wake_up_time = (1, 3600)
+        alru_params.wake_up_time = (0, 3600)
         return alru_params
 
     def __eq__(self, other):

test/functional/api/cas/casadm.py

@@ -1,5 +1,5 @@
 #
-# Copyright(c) 2019 Intel Corporation
+# Copyright(c) 2019-2020 Intel Corporation
 # SPDX-License-Identifier: BSD-3-Clause-Clear
 #
 
@@ -274,11 +274,11 @@ def set_param_cleaning_alru(cache_id: int, wake_up: int = None, staleness_time:
                             flush_max_buffers: int = None, activity_threshold: int = None):
     output = TestRun.executor.run(
         set_param_cleaning_alru_cmd(
-            cache_id=str(cache_id),
-            wake_up=str(wake_up) if wake_up else None,
-            staleness_time=str(staleness_time) if staleness_time else None,
-            flush_max_buffers=str(flush_max_buffers) if flush_max_buffers else None,
-            activity_threshold=str(activity_threshold) if activity_threshold else None))
+            cache_id=cache_id,
+            wake_up=wake_up,
+            staleness_time=staleness_time,
+            flush_max_buffers=flush_max_buffers,
+            activity_threshold=activity_threshold))
     if output.exit_code != 0:
         raise CmdException("Error while setting alru cleaning policy parameters.", output)
     return output

test/functional/api/cas/cli.py

@@ -1,5 +1,5 @@
 #
-# Copyright(c) 2019 Intel Corporation
+# Copyright(c) 2019-2020 Intel Corporation
 # SPDX-License-Identifier: BSD-3-Clause-Clear
 #
 
@@ -210,18 +210,19 @@ def set_param_cleaning_cmd(cache_id: str, policy: str, shortcut: bool = False):
                           additional_params=add_params, shortcut=shortcut)
 
 
-def set_param_cleaning_alru_cmd(cache_id: str, wake_up: str, staleness_time: str,
-                                flush_max_buffers: str, activity_threshold: str,
+def set_param_cleaning_alru_cmd(cache_id, wake_up, staleness_time,
+                                flush_max_buffers, activity_threshold,
                                 shortcut: bool = False):
     add_param = ""
     if wake_up is not None:
-        add_param += (" -w " if shortcut else " --wake-up ") + wake_up
+        add_param += (" -w " if shortcut else " --wake-up ") + str(wake_up)
     if staleness_time is not None:
-        add_param += (" -s " if shortcut else " --staleness-time ") + staleness_time
+        add_param += (" -s " if shortcut else " --staleness-time ") + str(staleness_time)
     if flush_max_buffers is not None:
-        add_param += (" -b " if shortcut else " --flush-max-buffers ") + flush_max_buffers
+        add_param += (" -b " if shortcut else " --flush-max-buffers ") + str(flush_max_buffers)
     if activity_threshold is not None:
-        add_param += (" -t " if shortcut else " --activity-threshold ") + activity_threshold
+        add_param += (" -t " if shortcut else " --activity-threshold ") + str(activity_threshold)
+
     return _set_param_cmd(namespace="cleaning-alru", cache_id=cache_id,
                           additional_params=add_param, shortcut=shortcut)
 

test/functional/test-framework

@@ -1 +1 @@
-Subproject commit 3479438e60ee24fcd9ddb3f1be7616802a432646
+Subproject commit bb5c9a4e178bcf77a37dc56c04df329c78e162e1

test/functional/tests/cleaning/test_alru.py

@@ -0,0 +1,117 @@
+#
+# Copyright(c) 2020 Intel Corporation
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+#
+
+import time
+from datetime import timedelta
+import pytest
+
+from core.test_run import TestRun
+from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
+from api.cas import casadm
+from api.cas.cache_config import CacheMode, CleaningPolicy, FlushParametersAlru, SeqCutOffPolicy
+from test_utils.os_utils import Udev, kill_all_io
+from test_utils.time import Time
+from test_utils.size import Size, Unit
+from test_tools.fio.fio import Fio
+from test_tools.fio.fio_param import ReadWrite, IoEngine
+
+
+@pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
+@pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
+def test_alru_no_idle():
+    """
+        title: Test ALRU with activity threshold set to 0
+        description: |
+          Verify that ALRU is able to perform cleaning if cache is under constant load and
+          activity threshold is set to 0. Constant load is performed by using fio instance running
+          in background.
+        pass_criteria:
+          - Dirty cache lines are cleaned successfuly.
+    """
+
+    with TestRun.step("Prepare configuration"):
+        cache, core = prepare()
+
+    with TestRun.step("Prepare dirty data to be cleaned"):
+        bg_size = Size(2, Unit.MiB)
+        (
+            Fio()
+            .create_command()
+            .io_engine(IoEngine.libaio)
+            .offset(bg_size)
+            .size(Size(10, Unit.MiB))
+            .block_size(Size(4, Unit.KiB))
+            .target(core)
+            .direct()
+            .read_write(ReadWrite.randwrite)
+            .run()
+        )
+
+    with TestRun.step("Run background fio"):
+        (
+            Fio()
+            .create_command()
+            .io_engine(IoEngine.libaio)
+            .size(bg_size)
+            .block_size(Size(4, Unit.KiB))
+            .target(core)
+            .direct()
+            .time_based(True)
+            .run_time(timedelta(hours=1))
+            .read_write(ReadWrite.randwrite)
+            .run_in_background()
+        )
+
+    with TestRun.step("Verify that cache is dirty"):
+        # Wait for bg fio to dirty whole workset
+        time.sleep(5)
+        dirty_before = cache.get_statistics().usage_stats.dirty
+
+        if dirty_before == Size(0):
+            TestRun.fail("Cache should be dirty")
+
+    with TestRun.step("Check that cleaning doesn't occur under constant load"):
+        time.sleep(5)
+
+        dirty_now = cache.get_statistics().usage_stats.dirty
+
+        if dirty_before > dirty_now:
+            TestRun.fail(
+                f"Cleaning has run, while it shouldn't"
+                " (dirty down from {dirty_before} to {dirty_now}"
+            )
+
+    with TestRun.step("Set 0 idle time and wake up time for ALRU"):
+        cache.set_params_alru(FlushParametersAlru(activity_threshold=Time(0), wake_up_time=Time(0)))
+
+    with TestRun.step("Check that cleaning is progressing"):
+        time.sleep(5)
+
+        if dirty_before <= cache.get_statistics().usage_stats.dirty:
+            TestRun.fail("Cleaning didn't run")
+
+    kill_all_io()
+
+
+def prepare():
+    cache_dev = TestRun.disks["cache"]
+    core_dev = TestRun.disks["core"]
+
+    cache_dev.create_partitions([Size(100, Unit.MiB)])
+    core_dev.create_partitions([Size(200, Unit.MiB)])
+
+    Udev.disable()
+    cache = casadm.start_cache(cache_dev.partitions[0], force=True, cache_mode=CacheMode.WB)
+    core = cache.add_core(core_dev.partitions[0])
+    cache.set_seq_cutoff_policy(SeqCutOffPolicy.never)
+    cache.set_cleaning_policy(CleaningPolicy.alru)
+    cache.set_params_alru(
+        FlushParametersAlru(
+            activity_threshold=Time(seconds=100),
+            staleness_time=Time(seconds=1),
+        )
+    )
+
+    return cache, core