commit b3af4ec6bae4fe93d40f021e54cbbce10cc7b4c6
author Dianne Hackborn <hackbod@google.com> Fri Oct 17 15:25:13 2014 -0700
committer Dianne Hackborn <hackbod@google.com> Fri Oct 17 15:25:13 2014 -0700
tree 39f7d4ba2a33b28fcc755a8449c75a7598f320fc
parent 12c84b5d9f30f3d31ab18fee719f3a1bf00ab957

Fix issue #17948288: Improve accuracy of memory use reporting

We now use Mapped to not double-count cached pages that are
mapped in to app processes.  Also read in some more values that
count towards kernel RAM use, and count buffers as free rather
than used RAM.

It also looks like the zram accounting is broken -- it was never
collecting the total zram reserved space.  I need to figure out
how I was finding that before.

Change-Id: I883f6fc93966774b5c7d2801d1801666dd11ed41

core/jni/android_os_Debug.cpp

diff --git a/core/jni/android_os_Debug.cpp b/core/jni/android_os_Debug.cpp
index 7b3528b..9ec9993 100644
--- a/core/jni/android_os_Debug.cpp
+++ b/core/jni/android_os_Debug.cpp
@@ -552,6 +552,10 @@
     MEMINFO_SWAP_TOTAL,
     MEMINFO_SWAP_FREE,
     MEMINFO_ZRAM_TOTAL,
+    MEMINFO_MAPPED,
+    MEMINFO_VMALLOC_USED,
+    MEMINFO_PAGE_TABLES,
+    MEMINFO_KERNEL_STACK,
     MEMINFO_COUNT
 };
 
@@ -590,6 +594,11 @@
             "Slab:",
             "SwapTotal:",
             "SwapFree:",
+            "ZRam:",
+            "Mapped:",
+            "VmallocUsed:",
+            "PageTables:",
+            "KernelStack:",
             NULL
     };
     static const int tagsLen[] = {
@@ -601,12 +610,17 @@
             5,
             10,
             9,
+            5,
+            7,
+            12,
+            11,
+            12,
             0
     };
-    long mem[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+    long mem[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 
     char* p = buffer;
-    while (*p && numFound < 8) {
+    while (*p && numFound < 13) {
         int i = 0;
         while (tags[i]) {
             if (strncmp(p, tags[i], tagsLen[i]) == 0) {