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Commit aec8de15 authored by Rafal Slawik's avatar Rafal Slawik
Browse files

Add histogram metric for digest latency 

Using 50 uniform bins between 0 and 500 ms.

Bug: 268323312
Test: build
Test: manual
Change-Id: I63efb508ada21fc420bca3bdbdac4f05f357b451
parent 3750fbe4

services/core/java/com/android/server/BinaryTransparencyService.java

+7 −1
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ import android.util.apk.ApkSignatureVerifier; 
import android.util.apk.ApkSigningBlockUtils;



import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.expresslog.Histogram;

import com.android.internal.os.IBinaryTransparencyService;

import com.android.internal.util.FrameworkStatsLog;

import com.android.server.pm.ApexManager;
@@ -141,6 +142,10 @@ public class BinaryTransparencyService extends SystemService { 


    private static final boolean DEBUG = false;     // toggle this for local debug



    private static final Histogram digestAllPackagesLatency = new Histogram(

            "binary_transparency.value_digest_all_packages_latency_uniform",

            new Histogram.UniformOptions(50, 0, 500));



    private final Context mContext;

    private String mVbmetaDigest;

    // the system time (in ms) the last measurement was taken
@@ -350,8 +355,9 @@ public class BinaryTransparencyService extends SystemService { 
                    writeAppInfoToLog(appInfo);

                }

            }

            if (DEBUG) {

            long timeSpentMeasuring = System.currentTimeMillis() - currentTimeMs;

            digestAllPackagesLatency.logSample(timeSpentMeasuring);

            if (DEBUG) {

                Slog.d(TAG, "Measured " + packagesMeasured.size()

                        + " packages altogether in " + timeSpentMeasuring + "ms");

            }