Extend DAMON selftest-purpose sysfs wrapper to support DAMOS quota goal,
and implement a simple selftest for the feature using it.
SeongJae Park (2):
selftests/damon/_damon_sysfs: support quota goals
selftests/damon: add a test for DAMOS quota goal
tools/testing/selftests/damon/Makefile | 2 +-
tools/testing/selftests/damon/_damon_sysfs.py | 84 ++++++++++++++++++-
.../selftests/damon/damos_quota_goal.py | 77 +++++++++++++++++
3 files changed, 161 insertions(+), 2 deletions(-)
create mode 100755 tools/testing/selftests/damon/damos_quota_goal.py
base-commit: ff0a7c4126d225e56aa3e0164c53e82aabf61921
--
2.39.2
Add a selftest for DAMOS quota goal. It tests the feature by setting a
user_input metric based goal, change the current feedback, and check if
the effective quota size is increased and decreased as expected.
Signed-off-by: SeongJae Park <[email protected]>
---
tools/testing/selftests/damon/Makefile | 2 +-
.../selftests/damon/damos_quota_goal.py | 77 +++++++++++++++++++
2 files changed, 78 insertions(+), 1 deletion(-)
create mode 100755 tools/testing/selftests/damon/damos_quota_goal.py
diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile
index 789d6949c247..06c248880172 100644
--- a/tools/testing/selftests/damon/Makefile
+++ b/tools/testing/selftests/damon/Makefile
@@ -16,7 +16,7 @@ TEST_PROGS += debugfs_target_ids_pid_leak.sh
TEST_PROGS += sysfs.sh sysfs_update_removed_scheme_dir.sh
TEST_PROGS += sysfs_update_schemes_tried_regions_hang.py
TEST_PROGS += sysfs_update_schemes_tried_regions_wss_estimation.py
-TEST_PROGS += damos_quota.py damos_apply_interval.py
+TEST_PROGS += damos_quota.py damos_quota_goal.py damos_apply_interval.py
TEST_PROGS += reclaim.sh lru_sort.sh
include ../lib.mk
diff --git a/tools/testing/selftests/damon/damos_quota_goal.py b/tools/testing/selftests/damon/damos_quota_goal.py
new file mode 100755
index 000000000000..18246f3b62f7
--- /dev/null
+++ b/tools/testing/selftests/damon/damos_quota_goal.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+import time
+
+import _damon_sysfs
+
+def main():
+ # access two 10 MiB memory regions, 2 second per each
+ sz_region = 10 * 1024 * 1024
+ proc = subprocess.Popen(['./access_memory', '2', '%d' % sz_region, '2000'])
+
+ goal = _damon_sysfs.DamosQuotaGoal(
+ metric=_damon_sysfs.qgoal_metric_user_input, target_value=10000)
+ kdamonds = _damon_sysfs.Kdamonds([_damon_sysfs.Kdamond(
+ contexts=[_damon_sysfs.DamonCtx(
+ ops='vaddr',
+ targets=[_damon_sysfs.DamonTarget(pid=proc.pid)],
+ schemes=[_damon_sysfs.Damos(
+ action='stat',
+ quota=_damon_sysfs.DamosQuota(
+ goals=[goal], reset_interval_ms=100),
+ )] # schemes
+ )] # contexts
+ )]) # kdamonds
+
+ err = kdamonds.start()
+ if err != None:
+ print('kdamond start failed: %s' % err)
+ exit(1)
+
+ score_values_to_test = [0, 15000, 5000, 18000]
+ while proc.poll() == None:
+ if len(score_values_to_test) == 0:
+ time.sleep(0.1)
+ continue
+
+ goal.current_value = score_values_to_test.pop(0)
+ expect_increase = goal.current_value < goal.target_value
+
+ err = kdamonds.kdamonds[0].commit_schemes_quota_goals()
+ if err is not None:
+ print('commit_schemes_quota_goals failed: %s' % err)
+ exit(1)
+
+ err = kdamonds.kdamonds[0].update_schemes_effective_quotas()
+ if err is not None:
+ print('before-update_schemes_effective_quotas failed: %s' % err)
+ exit(1)
+ last_effective_bytes = goal.effective_bytes
+
+ time.sleep(0.5)
+
+ err = kdamonds.kdamonds[0].update_schemes_effective_quotas()
+ if err is not None:
+ print('after-update_schemes_effective_quotas failed: %s' % err)
+ exit(1)
+
+ print('score: %s, effective quota: %d -> %d (%.3fx)' % (
+ goal.current_value, last_effective_bytes, goal.effective_bytes,
+ goal.effective_bytes / last_effective_bytes
+ if last_effective_bytes != 0 else -1.0))
+
+ if last_effective_bytes == goal.effective_bytes:
+ print('efective bytes not changed: %d' % goal.effective_bytes)
+ exit(1)
+
+ increased = last_effective_bytes < goal.effective_bytes
+ if expect_increase != increased:
+ print('expectation of increase (%s) != increased (%s)' %
+ (expect_increase, increased))
+ exit(1)
+ last_effective_bytes = goal.effective_bytes
+
+if __name__ == '__main__':
+ main()
--
2.39.2