commit 88a7afe40b905565eedce5ef060a9b768a9c1059
author Andy Hung <hunga@google.com> Mon Aug 12 20:00:46 2024 -0700
committer Andy Hung <hunga@google.com> Fri Sep 06 16:36:32 2024 -0700
tree 3e9c1b7100d48be8ad6a6ad4b4da5e99aa88e21b
parent 749910d5faf05052d7efd181155d8c24fc24ea79

audioserver: add automated audio power logging

We utilize the wakelock and batterystat logic to measure
by app the power used during audio playback.

This is integrated into audioserver to allow close tracking
of apps in and out of suspend.

This is default disabled for now. Before trying, use
$ adb shell setenforce 0
$ adb shell setprop persist.audio.power_stats.enabled true
$ adb shell aflags enable com.android.media.audioserver.power_stats true

Flag: com.android.media.audioserver.power_stats
Test: atest powerstats_collector_tests
Test: atest audio_powerstats_benchmark
Test: audio_powerstatscollector_benchmark
Test: atest audio_token_benchmark
Bug: 350114693
Change-Id: I6e0c04089fce72b1e3e22532e39f38f5d6657f28

services/audioflinger/AudioFlinger.cpp

diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index d94862a..e1b244b 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -899,6 +899,17 @@
 
         BUFLOG_RESET;
 
+        if (media::psh_utils::AudioPowerManager::enabled()) {
+            char value[PROPERTY_VALUE_MAX];
+            property_get("ro.build.display.id", value, "Unknown build");
+            std::string build(value);
+            build.append("\n");
+            write(fd, build.c_str(), build.size());
+            const std::string powerLog =
+                    media::psh_utils::AudioPowerManager::getAudioPowerManager().toString();
+            write(fd, powerLog.c_str(), powerLog.size());
+        }
+
         if (locked) {
             mutex().unlock();
         }
@@ -2327,6 +2338,9 @@
                                                      pid_t pid,
                                                      uid_t uid)
     : mAudioFlinger(audioFlinger), mPid(pid), mUid(uid), mAudioFlingerClient(client)
+    , mClientToken(media::psh_utils::AudioPowerManager::enabled()
+            ? media::psh_utils::createAudioClientToken(pid, uid)
+            : nullptr)
 {
 }