Details
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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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5.5.1
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None
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Android 5.1, Moto X
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Android
Description
A simple QNAM::get on Android (armv7) is blocking the calling thread. It seems to only happen on Android. Here is a code that can reproduce the bug.
I notice the UI of my app was choking on Android, then it narrow down to QNAM::get call. I don't know if it is initialization, but 759ms and 760ms for that is a long time.
main.cpp
#include <QGuiApplication> #include <QQmlApplicationEngine> #include <QNetworkAccessManager> #include <QElapsedTimer> #include <QDebug> #include <QNetworkReply> #include <QNetworkRequest> int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); QNetworkAccessManager nam; QElapsedTimer timer; timer.start(); nam.get(QNetworkRequest(QUrl("http://www.google.com"))); qDebug() << "result: " << timer.elapsed(); nam.get(QNetworkRequest(QUrl("http://www.bing.com"))); qDebug() << "result2: " << timer.elapsed(); return app.exec(); }
Output:
Starting remote process.I/ActivityManager( 898): Start proc 19198:org.qtproject.example.untitled/u0a502 for activity org.qtproject.example.untitled/org.qtproject.qt5.android.bindings.QtActivity I/art (19198): Late-enabling -Xcheck:jni W/linker (19198): libQt5Gui.so: unused DT entry: type 0x1d arg 0x4e21a W/linker (19198): libQt5Network.so: unused DT entry: type 0x1d arg 0x11731 W/linker (19198): libQt5Qml.so: unused DT entry: type 0x1d arg 0x3417d W/linker (19198): libQt5Quick.so: unused DT entry: type 0x1d arg 0x35b61 W/linker (19198): libQt5QuickParticles.so: unused DT entry: type 0x1d arg 0x3656 W/linker (19198): libqtforandroid.so: unused DT entry: type 0x1d arg 0x8f94 I/Qt (19198): qt start W/linker (19198): libqandroidbearer.so: unused DT entry: type 0x1d arg 0x1727 W/linker (19198): libuntitled.so: unused DT entry: type 0x1d arg 0x61b D/ (19198): (null):0 ((null)): QML debugging is enabled. Only use this in a safe environment. D/OpenGLRenderer(19198): Use EGL_SWAP_BEHAVIOR_PRESERVED: true D/Atlas (19198): Validating map... I/Adreno-EGL(19198): <qeglDrvAPI_eglInitialize:410>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_LA.AF.1.1_RB1.05.00.02.006.020_msm8960_LA.AF.1.1_RB1__release_AU () I/Adreno-EGL(19198): OpenGL ES Shader Compiler Version: E031.25.03.06 I/Adreno-EGL(19198): Build Date: 03/30/15 Mon I/Adreno-EGL(19198): Local Branch: mybranch8688311 I/Adreno-EGL(19198): Remote Branch: quic/LA.AF.1.1_rb1.16 I/Adreno-EGL(19198): Local Patches: NONE I/Adreno-EGL(19198): Reconstruct Branch: AU_LINUX_ANDROID_LA.AF.1.1_RB1.05.00.02.006.020 + 9b2699f + 2215637 + 60aa592 + f2362e6 + 5c64f59 + 82411a1 + 1f36e07 + NOTHING I/OpenGLRenderer(19198): Initialized EGL, version 1.4 D/OpenGLRenderer(19198): Enabling debug mode 0 D/libuntitled.so(19198): ../untitled/main.cpp:17 (int main(int, char**)): result: 759 D/libuntitled.so(19198): ../untitled/main.cpp:19 (int main(int, char**)): result2: 760