commit 01fd21a6e7633424bfd6e2bac5da8522d61e5aaf
author Christoffer Adamsen <christofferqa@google.com> Mon Oct 14 12:16:52 2024 +0200
committer Christoffer Adamsen <christofferqa@google.com> Mon Oct 14 12:16:52 2024 +0200
tree 763c0bb670c2f6b40dd05948a90875d373fa1f37
parent 183e680f03cd817b6c040b11e2e987849c057451

Use perf.drop_caches in adb_utils

Change-Id: I307321a37936e836873fa2ce904a13bde55c47cd

tools/startup/adb_utils.py

diff --git a/tools/startup/adb_utils.py b/tools/startup/adb_utils.py
index 0a4ae59..13d4ee7 100755
--- a/tools/startup/adb_utils.py
+++ b/tools/startup/adb_utils.py
@@ -152,7 +152,10 @@
 
 
 def drop_caches(device_id=None):
-    cmd = create_adb_cmd(['shell', 'echo 3 > /proc/sys/vm/drop_caches'],
+    # On older devices  this used to be achieved using:
+    #   adb shell echo 3 > /proc/sys/vm/drop_caches
+    # This does not work on user devices, however.
+    cmd = create_adb_cmd(['shell', 'setprop', 'perf.drop_caches', '3'],
                          device_id)
     subprocess.check_call(cmd, stdout=DEVNULL, stderr=DEVNULL)