Add histogram metric for digest latency
Using 50 uniform bins between 0 and 500 ms.
Bug: 268323312
Test: build
Test: manual
Change-Id: I63efb508ada21fc420bca3bdbdac4f05f357b451
diff --git a/services/core/java/com/android/server/BinaryTransparencyService.java b/services/core/java/com/android/server/BinaryTransparencyService.java
index eafd3e0..c3ee81f 100644
--- a/services/core/java/com/android/server/BinaryTransparencyService.java
+++ b/services/core/java/com/android/server/BinaryTransparencyService.java
@@ -81,6 +81,7 @@
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 @@
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 @@
writeAppInfoToLog(appInfo);
}
}
+ long timeSpentMeasuring = System.currentTimeMillis() - currentTimeMs;
+ digestAllPackagesLatency.logSample(timeSpentMeasuring);
if (DEBUG) {
- long timeSpentMeasuring = System.currentTimeMillis() - currentTimeMs;
Slog.d(TAG, "Measured " + packagesMeasured.size()
+ " packages altogether in " + timeSpentMeasuring + "ms");
}