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author | Anwar Ghuloum <anwarg@google.com> | 2014-09-04 07:49:39 -0700 |
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committer | Anwar Ghuloum <anwarg@google.com> | 2014-09-05 07:13:57 -0700 |
commit | 6d688b8bb051942cd3cdd5fc1e19f42c3049f8a1 (patch) | |
tree | df7c61d6f83ab312d722a5b06851c849720d5158 /dalvik | |
parent | ae45925d3a59ae3eb72d70e305d2c1dab5ef6d17 (diff) | |
download | libcore-6d688b8bb051942cd3cdd5fc1e19f42c3049f8a1.zip libcore-6d688b8bb051942cd3cdd5fc1e19f42c3049f8a1.tar.gz libcore-6d688b8bb051942cd3cdd5fc1e19f42c3049f8a1.tar.bz2 |
Timing hacks DO NOT MERGE
Let's submit to see if any issues remain
Bug: 17310019
Change-Id: Ifef1b1645033adcf192d6ec9248456cae28cd09f
Diffstat (limited to 'dalvik')
-rw-r--r-- | dalvik/src/main/java/dalvik/system/ZygoteHooks.java | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/dalvik/src/main/java/dalvik/system/ZygoteHooks.java b/dalvik/src/main/java/dalvik/system/ZygoteHooks.java index fa4f392..1f8f28a 100644 --- a/dalvik/src/main/java/dalvik/system/ZygoteHooks.java +++ b/dalvik/src/main/java/dalvik/system/ZygoteHooks.java @@ -28,6 +28,19 @@ public final class ZygoteHooks { private long token; /** + * Temporary hack: check time since start time and log if over a fixed threshold. + * + */ + private static void checkTime(long startTime, String where) { + long now = System.nanoTime(); + long msDuration = (now - startTime) / (1000 * 1000); + if (msDuration > 1000) { + // If we are taking more than a second, log about it. + System.logW("Slow operation: " + msDuration + "ms so far, now at " + where); + } + } + + /** * Called by the zygote prior to every fork. Each call to {@code preFork} * is followed by a matching call to {@link #postForkChild(int)} on the child * process and {@link #postForkCommon()} on both the parent and the child @@ -35,9 +48,13 @@ public final class ZygoteHooks { * the child process. */ public void preFork() { + long startTime = System.nanoTime(); Daemons.stop(); + checkTime(startTime, "ZygoteHooks.Daemons.stop"); waitUntilAllThreadsStopped(); + checkTime(startTime, "ZygoteHooks.waituntilallthreadsstopped"); token = nativePreFork(); + checkTime(startTime, "ZygoteHooks.Daemons.nativePreFork"); } /** |