linux-kernel - [PATCH 16/22] selftests/damon/sysfs.py: generalize DAMOS schemes commit assertion

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Message-Id: <20250720171652.92309-17-sj@kernel.org>
Date: Sun, 20 Jul 2025 10:16:46 -0700
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 16/22] selftests/damon/sysfs.py: generalize DAMOS schemes commit assertion

DAMOS scheme commitment assertion is hard-coded for a specific test
case.  Split it out into a general version that can be reused for
different test cases.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 tools/testing/selftests/damon/sysfs.py | 59 ++++++++++++++++----------
 1 file changed, 37 insertions(+), 22 deletions(-)

diff --git a/tools/testing/selftests/damon/sysfs.py b/tools/testing/selftests/damon/sysfs.py
index 803f38b61ab3..584a71cbb891 100755
--- a/tools/testing/selftests/damon/sysfs.py
+++ b/tools/testing/selftests/damon/sysfs.py
@@ -76,6 +76,42 @@ def assert_migrate_dests_committed(dests, dump):
         assert_true(dump['node_id_arr'][idx] == dest.id, 'node_id', dump)
         assert_true(dump['weight_arr'][idx] == dest.weight, 'weight', dump)
 
+def assert_access_pattern_committed(pattern, dump):
+    assert_true(dump['min_sz_region'] == pattern.size[0], 'min_sz_region',
+                dump)
+    assert_true(dump['max_sz_region'] == pattern.size[1], 'max_sz_region',
+                dump)
+    assert_true(dump['min_nr_accesses'] == pattern.nr_accesses[0],
+                'min_nr_accesses', dump)
+    assert_true(dump['max_nr_accesses'] == pattern.nr_accesses[1],
+                'max_nr_accesses', dump)
+    assert_true(dump['min_age_region'] == pattern.age[0], 'min_age_region',
+                dump)
+    assert_true(dump['max_age_region'] == pattern.age[1], 'miaxage_region',
+                dump)
+
+def assert_scheme_committed(scheme, dump):
+    assert_access_pattern_committed(scheme.access_pattern, dump['pattern'])
+    action_val = {
+            'willneed': 0,
+            'cold': 1,
+            'pageout': 2,
+            'hugepage': 3,
+            'nohugeapge': 4,
+            'lru_prio': 5,
+            'lru_deprio': 6,
+            'migrate_hot': 7,
+            'migrate_cold': 8,
+            'stat': 9,
+            }
+    assert_true(dump['action'] == action_val[scheme.action], 'action', dump)
+    assert_true(dump['apply_interval_us'] == scheme. apply_interval_us,
+                'apply_interval_us', dump)
+    assert_true(dump['target_nid'] == scheme.target_nid, 'target_nid', dump)
+    assert_migrate_dests_committed(scheme.dests, dump['migrate_dests'])
+    assert_quota_committed(scheme.quota, dump['quota'])
+    assert_watermarks_committed(scheme.watermarks, dump['wmarks'])
+
 def main():
     kdamonds = _damon_sysfs.Kdamonds(
             [_damon_sysfs.Kdamond(
@@ -122,28 +158,7 @@ def main():
     if len(ctx['schemes']) != 1:
         fail('number of schemes', status)
 
-    scheme = ctx['schemes'][0]
-    if scheme['pattern'] != {
-            'min_sz_region': 0,
-            'max_sz_region': 2**64 - 1,
-            'min_nr_accesses': 0,
-            'max_nr_accesses': 2**32 - 1,
-            'min_age_region': 0,
-            'max_age_region': 2**32 - 1,
-            }:
-        fail('damos pattern', status)
-    if scheme['action'] != 9:   # stat
-        fail('damos action', status)
-    if scheme['apply_interval_us'] != 0:
-        fail('damos apply interval', status)
-    if scheme['target_nid'] != -1:
-        fail('damos target nid', status)
-
-    assert_migrate_dests_committed(_damon_sysfs.DamosDests(),
-                                   scheme['migrate_dests'])
-    assert_quota_committed(_damon_sysfs.DamosQuota(), scheme['quota'])
-    assert_watermarks_committed(_damon_sysfs.DamosWatermarks(),
-                                scheme['wmarks'])
+    assert_scheme_committed(_damon_sysfs.Damos(), ctx['schemes'][0])
 
     kdamonds.stop()
 
-- 
2.39.5