Collect status on uncrypt time cost

Read and report time cost of uncrypt (in seconds) from last_install.

Bug: 31383361

Change-Id: I283970c33b2a0324f2f51cde328e3e527eff7c58
(cherry picked from commit 3477efce30b1d7f6f8bd07e31d9f1befadda2a34)

1 files changed, 6 insertions, 0 deletions

diff --git a/core/java/android/os/RecoverySystem.java b/core/java/android/os/RecoverySystem.java
index 507379baaa94..90bd11fe83bc 100644
--- a/core/java/android/os/RecoverySystem.java
+++ b/core/java/android/os/RecoverySystem.java
@@ -724,6 +724,7 @@ public class RecoverySystem {
             String line = null;
             int bytesWrittenInMiB = -1, bytesStashedInMiB = -1;
             int timeTotal = -1;
+            int uncryptTime = -1;
             int sourceVersion = -1;
             while ((line = in.readLine()) != null) {
                 // Here is an example of lines in last_install:
@@ -759,6 +760,8 @@ public class RecoverySystem {
 
                 if (line.startsWith("time")) {
                     timeTotal = scaled;
+                } else if (line.startsWith("uncrypt_time")) {
+                    uncryptTime = scaled;
                 } else if (line.startsWith("source_build")) {
                     sourceVersion = scaled;
                 } else if (line.startsWith("bytes_written")) {
@@ -774,6 +777,9 @@ public class RecoverySystem {
             if (timeTotal != -1) {
                 MetricsLogger.histogram(context, "ota_time_total", timeTotal);
             }
+            if (uncryptTime != -1) {
+                MetricsLogger.histogram(context, "ota_uncrypt_time", uncryptTime);
+            }
             if (sourceVersion != -1) {
                 MetricsLogger.histogram(context, "ota_source_version", sourceVersion);
             }