Add JNI API to query sizes of ION heaps, pools and mapped part of the heaps
Provide means for system_server to query ION memory usage. The new API
allows to get total size of ION heaps, pools and part of ION heaps that
is mapped into user space.
Bug: 138148041
Test: dumpsys meminfo
Change-Id: I6d76d534bbab5ee1646e8e3e3fe5210dcf76bc23
Merged-In: I6d76d534bbab5ee1646e8e3e3fe5210dcf76bc23
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
diff --git a/core/java/android/os/Debug.java b/core/java/android/os/Debug.java
index bf26a41..422761c 100644
--- a/core/java/android/os/Debug.java
+++ b/core/java/android/os/Debug.java
@@ -2503,4 +2503,27 @@
* @hide
*/
public static native long getZramFreeKb();
+
+ /**
+ * Return memory size in kilobytes allocated for ION heaps.
+ *
+ * @hide
+ */
+ public static native long getIonHeapsSizeKb();
+
+ /**
+ * Return memory size in kilobytes allocated for ION pools.
+ *
+ * @hide
+ */
+ public static native long getIonPoolsSizeKb();
+
+ /**
+ * Return ION memory mapped by processes in kB.
+ * Notes:
+ * * Warning: Might impact performance as it reads /proc/<pid>/maps files for each process.
+ *
+ * @hide
+ */
+ public static native long getIonMappedSizeKb();
}
diff --git a/core/jni/Android.bp b/core/jni/Android.bp
index 49c029c..f68fd57 100644
--- a/core/jni/Android.bp
+++ b/core/jni/Android.bp
@@ -233,6 +233,7 @@
static_libs: [
"libasync_safe",
+ "libdmabufinfo",
"libgif",
"libseccomp_policy",
"libgrallocusage",
diff --git a/core/jni/android_os_Debug.cpp b/core/jni/android_os_Debug.cpp
index 6aed1e8..1ff28fe 100644
--- a/core/jni/android_os_Debug.cpp
+++ b/core/jni/android_os_Debug.cpp
@@ -43,6 +43,7 @@
#include <nativehelper/JNIHelp.h>
#include <nativehelper/ScopedUtfChars.h>
#include "jni.h"
+#include <dmabufinfo/dmabufinfo.h>
#include <meminfo/procmeminfo.h>
#include <meminfo/sysmeminfo.h>
#include <memtrack/memtrack.h>
@@ -779,6 +780,59 @@
return zramFreeKb;
}
+static jlong android_os_Debug_getIonHeapsSizeKb(JNIEnv* env, jobject clazz) {
+ jlong heapsSizeKb = 0;
+ uint64_t size;
+
+ if (meminfo::ReadIonHeapsSizeKb(&size)) {
+ heapsSizeKb = size;
+ }
+
+ return heapsSizeKb;
+}
+
+static jlong android_os_Debug_getIonPoolsSizeKb(JNIEnv* env, jobject clazz) {
+ jlong poolsSizeKb = 0;
+ uint64_t size;
+
+ if (meminfo::ReadIonPoolsSizeKb(&size)) {
+ poolsSizeKb = size;
+ }
+
+ return poolsSizeKb;
+}
+
+static jlong android_os_Debug_getIonMappedSizeKb(JNIEnv* env, jobject clazz) {
+ jlong ionPss = 0;
+ std::vector<dmabufinfo::DmaBuffer> dmabufs;
+
+ std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir("/proc"), closedir);
+ if (!dir) {
+ LOG(ERROR) << "Failed to open /proc directory";
+ return false;
+ }
+
+ struct dirent* dent;
+ while ((dent = readdir(dir.get()))) {
+ if (dent->d_type != DT_DIR) continue;
+
+ int pid = atoi(dent->d_name);
+ if (pid == 0) {
+ continue;
+ }
+
+ if (!AppendDmaBufInfo(pid, &dmabufs, false)) {
+ LOG(ERROR) << "Failed to read maps for pid " << pid;
+ }
+ }
+
+ for (dmabufinfo::DmaBuffer buf : dmabufs) {
+ ionPss += buf.size() / 1024;
+ }
+
+ return ionPss;
+}
+
/*
* JNI registration.
*/
@@ -822,6 +876,12 @@
(void*)android_os_Debug_getUnreachableMemory },
{ "getZramFreeKb", "()J",
(void*)android_os_Debug_getFreeZramKb },
+ { "getIonHeapsSizeKb", "()J",
+ (void*)android_os_Debug_getIonHeapsSizeKb },
+ { "getIonPoolsSizeKb", "()J",
+ (void*)android_os_Debug_getIonPoolsSizeKb },
+ { "getIonMappedSizeKb", "()J",
+ (void*)android_os_Debug_getIonMappedSizeKb },
};
int register_android_os_Debug(JNIEnv *env)