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Commit c9342849 authored by Hector Dearman's avatar Hector Dearman
Browse files

perfetto: Add setting to enable/disable traced 

This will help us run P/H experiments by controlling the
whether traced runs through P/H.

This will allow to gradually roll out traced and, in an
emergency, remotely disable it.

Run:
$ adb shell 'ps -A | grep traced'
Should see traced.
$ adb shell 'settings put global sys_traced 0'
$ adb shell 'ps -A | grep traced'
Should no longer see traced.

Test: See above.
Bug: b/71737179
Change-Id: I1f564421d9abae14d7d80769e9517eb363dae33a
parent 757fb482

core/java/android/provider/Settings.java

+11 −0
Original line number Diff line number Diff line
@@ -10374,6 +10374,17 @@ public final class Settings { 
        */

        public static final String SYS_UIDCPUPOWER = "sys_uidcpupower";



        /**

        * traced global setting. This controls weather the deamons: traced and

        * traced_probes run. This links the sys.traced system property.

        * The following values are supported:

        * 0 -> traced and traced_probes are disabled

        * 1 -> traced and traced_probes are enabled

        * Any other value defaults to disabled.

        * @hide

        */

        public static final String SYS_TRACED = "sys_traced";



        /**

         * An integer to reduce the FPS by this factor. Only for experiments. Need to reboot the

         * device for this setting to take full effect.

core/tests/coretests/src/android/provider/SettingsBackupTest.java

+1 −0
Original line number Diff line number Diff line
@@ -382,6 +382,7 @@ public class SettingsBackupTest { 
                    Settings.Global.SYS_STORAGE_THRESHOLD_PERCENTAGE,

                    Settings.Global.SYS_VDSO,

                    Settings.Global.SYS_UIDCPUPOWER,

                    Settings.Global.SYS_TRACED,

                    Settings.Global.FPS_DEVISOR,

                    Settings.Global.TCP_DEFAULT_INIT_RWND,

                    Settings.Global.TETHER_DUN_APN,

services/core/java/com/android/server/am/GlobalSettingsToPropertiesMapper.java

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ class GlobalSettingsToPropertiesMapper { 
        {Settings.Global.FPS_DEVISOR, ThreadedRenderer.DEBUG_FPS_DIVISOR},

        {Settings.Global.DISPLAY_PANEL_LPM, "sys.display_panel_lpm"},

        {Settings.Global.SYS_UIDCPUPOWER, "sys.uidcpupower"},

        {Settings.Global.SYS_TRACED, "persist.traced.enable"},

    };