Merge "frameworks/base : Enable Aggressive trim settings" (8e6ce499) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/am/ProcessList.java

+32 −3

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@ import com.android.server.wm.WindowManagerService;
		import android.content.res.Resources;
		import android.graphics.Point;
		import android.os.SystemProperties;
		import android.os.Process;
		import android.net.LocalSocketAddress;
		import android.net.LocalSocket;
		import android.util.Slog;
		@@ -129,6 +130,16 @@ final class ProcessList {
		// processes and the number of those processes does not count against the cached
		// process limit.
		static final int MAX_CACHED_APPS = SystemProperties.getInt("ro.sys.fw.bg_apps_limit",32);
		static final boolean USE_TRIM_SETTINGS =
		SystemProperties.getBoolean("ro.sys.fw.use_trim_settings",true);
		static final int EMPTY_APP_PERCENT = SystemProperties.getInt("ro.sys.fw.empty_app_percent",50);
		static final int TRIM_EMPTY_PERCENT =
		SystemProperties.getInt("ro.sys.fw.trim_empty_percent",100);
		static final int TRIM_CACHE_PERCENT =
		SystemProperties.getInt("ro.sys.fw.trim_cache_percent",100);
		static final long TRIM_ENABLE_MEMORY =
		SystemProperties.getLong("ro.sys.fw.trim_enable_memory",1073741824);
		public static boolean allowTrim() { return Process.getTotalMemory() < TRIM_ENABLE_MEMORY ; }

		// We allow empty processes to stick around for at most 30 minutes.
		static final long MAX_EMPTY_TIME = 30601000;
		@@ -138,11 +149,25 @@ final class ProcessList {

		// The number of empty apps at which we don't consider it necessary to do
		// memory trimming.
		static final int TRIM_EMPTY_APPS = MAX_EMPTY_APPS/2;
		public static int computeTrimEmptyApps() {
		if (USE_TRIM_SETTINGS && allowTrim()) {
		return MAX_EMPTY_APPS*TRIM_EMPTY_PERCENT/100;
		} else {
		return MAX_EMPTY_APPS/2;
		}
		}
		static final int TRIM_EMPTY_APPS = computeTrimEmptyApps();

		// The number of cached at which we don't consider it necessary to do
		// memory trimming.
		static final int TRIM_CACHED_APPS = (MAX_CACHED_APPS-MAX_EMPTY_APPS)/3;
		public static int computeTrimCachedApps() {
		if (USE_TRIM_SETTINGS && allowTrim()) {
		return MAX_CACHED_APPS*TRIM_CACHE_PERCENT/100;
		} else {
		return (MAX_CACHED_APPS-MAX_EMPTY_APPS)/3;
		}
		}
		static final int TRIM_CACHED_APPS = computeTrimCachedApps();

		// Threshold of number of cached+empty where we consider memory critical.
		static final int TRIM_CRITICAL_THRESHOLD = 3;
		@@ -337,8 +362,12 @@ final class ProcessList {
		}

		public static int computeEmptyProcessLimit(int totalProcessLimit) {
		if(USE_TRIM_SETTINGS && allowTrim()) {
		return totalProcessLimit*EMPTY_APP_PERCENT/100;
		} else {
		return totalProcessLimit/2;
		}
		}

		private static String buildOomTag(String prefix, String space, int val, int base) {
		if (val == base) {