Reduce amount of logging on failed proc file reading

We expect some proc file reading to fail when processes or threads
finish execution while we traverse their proc files. We should not
pollute logs when this traversal fails.

Test: Inspected `adb logcat`
Change-Id: Id811a1e6b5084a8a3a903a892a99e317d1e3ac7f

2 files changed, 6 insertions, 2 deletions

diff --git a/core/java/com/android/internal/os/KernelCpuThreadReader.java b/core/java/com/android/internal/os/KernelCpuThreadReader.java
index 6b277a0bd512..7c82a7eb97c4 100644
--- a/core/java/com/android/internal/os/KernelCpuThreadReader.java
+++ b/core/java/com/android/internal/os/KernelCpuThreadReader.java
@@ -173,7 +173,7 @@ public class KernelCpuThreadReader {
                 }
             }
         } catch (IOException e) {
-            Slog.w(TAG, "Failed to iterate over thread paths", e);
+            // Expected when a process finishes
             return null;
         }
 
diff --git a/core/java/com/android/internal/os/ProcStatsUtil.java b/core/java/com/android/internal/os/ProcStatsUtil.java
index 3d4df890852e..0002447fda2a 100644
--- a/core/java/com/android/internal/os/ProcStatsUtil.java
+++ b/core/java/com/android/internal/os/ProcStatsUtil.java
@@ -32,6 +32,8 @@ import java.io.IOException;
 @VisibleForTesting(visibility = VisibleForTesting.Visibility.PROTECTED)
 public final class ProcStatsUtil {
 
+    private static final boolean DEBUG = false;
+
     private static final String TAG = "ProcStatsUtil";
 
     /**
@@ -141,7 +143,9 @@ public final class ProcStatsUtil {
             }
             return byteStream.toString();
         } catch (IOException e) {
-            Slog.w(TAG, "Failed to open proc file", e);
+            if (DEBUG) {
+                Slog.d(TAG, "Failed to open proc file", e);
+            }
             return null;
         } finally {
             StrictMode.setThreadPolicy(savedPolicy);