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Zygote: Restore GL preload

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Preloading GLES drivers in Zygote was removed previously since it is
incompatible with updatable drivers. That caused some app startup
latency and system memory use regressions. This change re-adds GLES
driver preloading, but only on devices that don't support driver
updates.

Bug: 34611670
Bug: 35052548
Test: boot angler, systrace of Calculator app startup
Change-Id: Ibdc6b3c0ba4473574722641d4bfad4b375f908a3
This commit is contained in:
Jesse Hall
2017-02-09 14:43:14 -08:00
parent e3ed795fae
commit ba0370eef3
1 changed files with 13 additions and 0 deletions
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13
core/java/com/android/internal/os/ZygoteInit.java
View File

@@ -25,6 +25,7 @@ import android.icu.impl.CacheValue;
import android.icu.text.DecimalFormatSymbols;
import android.icu.util.ULocale;
import android.net.LocalServerSocket;
import android.opengl.EGL14;
import android.os.IInstalld;
import android.os.Process;
import android.os.RemoteException;
@@ -81,6 +82,7 @@ public class ZygoteInit {
private static final String TAG = "Zygote";
private static final String PROPERTY_DISABLE_OPENGL_PRELOADING = "ro.zygote.disable_gl_preload";
private static final String PROPERTY_GFX_DRIVER = "ro.gfx.driver.0";
private static final String PROPERTY_RUNNING_IN_CONTAINER = "ro.boot.container";
private static final int LOG_BOOT_PROGRESS_PRELOAD_START = 3020;
@@ -125,6 +127,9 @@ public class ZygoteInit {
bootTimingsTraceLog.traceBegin("PreloadResources");
preloadResources();
bootTimingsTraceLog.traceEnd(); // PreloadResources
Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "PreloadOpenGL");
preloadOpenGL();
Trace.traceEnd(Trace.TRACE_TAG_DALVIK);
preloadSharedLibraries();
preloadTextResources();
// Ask the WebViewFactory to do any initialization that must run in the zygote process,
@@ -174,6 +179,14 @@ public class ZygoteInit {
System.loadLibrary("jnigraphics");
}
private static void preloadOpenGL() {
String driverPackageName = SystemProperties.get(PROPERTY_GFX_DRIVER);
if (!SystemProperties.getBoolean(PROPERTY_DISABLE_OPENGL_PRELOADING, false) ||
driverPackageName == null || driverPackageName.isEmpty()) {
EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
}
}
private static void preloadTextResources() {
Hyphenator.init();
TextView.preloadFontCache();