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Commit a093ae7c authored by Stanislav Zholnin's avatar Stanislav Zholnin
Browse files

Change sampling ratio to 2% and add device config flag for sampling ratio adjustment. 

Bug: 154373877
Test: adb shell device_config put permissions dangerous_permission_state_sampling_rate 1.0 &&
./out/host/linux-x86/bin/statsd_testdrive 10067
Change-Id: Idd16b38f015e071fb95f0daa628cdc41ea779947

Change-Id: I00bfa4abeb6a052237b245df368e24ed3da261d9
parent 634642bc

services/core/java/com/android/server/stats/pull/StatsPullAtomService.java

+5 −1
Original line number Diff line number Diff line
@@ -206,6 +206,8 @@ public class StatsPullAtomService extends SystemService { 
    private static final int OP_FLAGS_PULLED = OP_FLAG_SELF | OP_FLAG_TRUSTED_PROXY;

    private static final String COMMON_PERMISSION_PREFIX = "android.permission.";

    private static final String APP_OPS_TARGET_COLLECTION_SIZE = "app_ops_target_collection_size";

    private static final String DANGEROUS_PERMISSION_STATE_SAMPLE_RATE =

            "dangerous_permission_state_sample_rate";



    private final Object mNetworkStatsLock = new Object();

    @GuardedBy("mNetworkStatsLock")
@@ -2583,6 +2585,8 @@ public class StatsPullAtomService extends SystemService { 


    int pullDangerousPermissionState(int atomTag, List<StatsEvent> pulledData) {

        final long token = Binder.clearCallingIdentity();

        float samplingRate = DeviceConfig.getFloat(DeviceConfig.NAMESPACE_PERMISSIONS,

                DANGEROUS_PERMISSION_STATE_SAMPLE_RATE, 0.02f);

        Set<Integer> reportedUids = new HashSet<>();

        try {

            PackageManager pm = mContext.getPackageManager();
@@ -2611,7 +2615,7 @@ public class StatsPullAtomService extends SystemService { 
                    reportedUids.add(pkg.applicationInfo.uid);



                    if (atomTag == FrameworkStatsLog.DANGEROUS_PERMISSION_STATE_SAMPLED

                            && ThreadLocalRandom.current().nextFloat() > 0.01f) {

                            && ThreadLocalRandom.current().nextFloat() > samplingRate) {

                        continue;

                    }