(Solved) C++ AMP in Qt

[technovelist]

Hi all,

My Qt project could benefit from GPU acceleration, for which I'm attempting to use C++ AMP. I'm using code taken straight from the documentation on C++ AMP ("http://blogs.msdn.com/b/nativeconcurrency/archive/2012/03/04/quot-hello-world-quot-in-c-amp.aspx":http://blogs.msdn.com/b/nativeconcurrency/archive/2012/03/04/quot-hello-world-quot-in-c-amp.aspx). However, my test program fails when trying to create the array_view object. It works fine as a Visual C++ 2013 program but blows up when running inside my Qt project (which is using the VS2013 compiler):

@#include <iostream>
#include <amp.h>
using namespace concurrency;

#include "amptest.h"

void AMPTest()
{
int v[11] = {'G', 'd', 'k', 'k', 'n', 31, 'v', 'n', 'q', 'k', 'c'};

array_view<int> av(11, v);
parallel_for_each(av.extent, [=](index<1> idx) restrict(amp)
{
  av[idx] += 1;
});

for(unsigned int i = 0; i < 11; i++)
  std::cout << static_cast<char>(av[i]);

}

@

Any assistance would be welcomed.

[Chris Kawa]

I just tried that in a fresh app created with widget app wizard and it works fine, apart from the D3D errors landing on the output that are "apparently fine":https://social.msdn.microsoft.com/Forums/vstudio/en-US/d9f0315e-e97b-4fad-af5c-f810835808cd/updates-to-c-ampdirectx-samples-needed-to-run-on-windows-81-vs2013-preview?forum=parallelcppnative in Debug mode.

How exactly does it "blow up"? It produces wrong results or doesn't compile at all and what errors the compiler gives if that is the case?

[technovelist]

It compiles fine but throws an exception on the line:

@ array_view<int> av(11, v);@

I'll post the call stack when I'm back at home and can re-run the code.

[technovelist]

Here's the call stack:

@0 RaiseException KERNELBASE 0x7510c42d
1 _CxxThrowException msvcrt 0x7692359c
2 ThrowFailure d3d11 0x68a77bdc
3 CDevice::LLOCompleteLayerConstruction d3d11 0x68a7eb7b
4 CBridgeImpl<ILayeredLockOwner,ID3D11LayeredDevice,CLayeredObject<CDevice>>::LLOCompleteLayerConstruction d3d11 0x68a72529
5 NDXGI::CDevice::LLOCompleteLayerConstruction d3d11 0x68a76df7
6 CBridgeImpl<ILayeredLockOwner,ID3D11LayeredDevice,CLayeredObject<NDXGI::CDevice>>::LLOCompleteLayerConstruction d3d11 0x68a726d6
7 NDebug::CDevice::LLOCompleteLayerConstruction D3D11_1SDKLayers 0x7779e046
8 CBridgeImpl<ILayeredLockOwner,ID3D11LayeredDevice,CLayeredObject<NDebug::CDevice>>::LLOCompleteLayerConstruction D3D11_1SDKLayers 0x77786617
9 NOutermost::CDevice::LLOCompleteLayerConstruction d3d11 0x68aac134
10 NOutermost::CDevice::FinalConstruct d3d11 0x68a766c3
11 TComObjectNOutermost::CDevice::TComObjectNOutermost::CDevice d3d11 0x68a73922
12 TComObjectNOutermost::CDevice::CreateInstance d3d11 0x68a734f9
13 D3D11CreateLayeredDevice d3d11 0x68a6faa6
14 D3D11CoreCreateLayeredDevice d3d11 0x68a6fd93
15 D3D11CoreCreateDevice d3d11 0x68a719b7
16 D3D11CreateDeviceAndSwapChain d3d11 0x68a71e4e
17 D3D11CreateDevice d3d11 0x68a71bdd
18 Concurrency::details::_D3D11_engine::_D3D11_engine d3d_engine.cpp 686 0x7792d7dc
19 Concurrency::details::_D3D_engine::_Create d3d_engine.cpp 361 0x7792cbc1
20 Concurrency::details::_D3D_accelerator_impl::_Create_D3D_engine d3d_compute_device.cpp 144 0x778c330c
21 Concurrency::details::_D3D_accelerator_impl::_Create_D3D_accelerator_view d3d_compute_device.cpp 163 0x778c33b2
22 Concurrency::details::_D3D_accelerator_impl::_D3D_accelerator_impl d3d_compute_device.cpp 41 0x778c2f74
23 Concurrency::details::_D3D_accelerator_impl::_Create_D3D_accelerator_impl d3d_compute_device.cpp 185 0x778c3492
24 Concurrency::details::_DPC_runtime_factory::_DPC_runtime_factory dpc_runtime_factory.cpp 537 0x778e4f7a
25 Concurrency::details::_SingletonConcurrency::details::_DPC_runtime_factory::_Get_object dpcrt_impl.h 607 0x778e78b2
26 Concurrency::details::_DPC_runtime_factory::_Get_factory dpc_runtime_factory.cpp 807 0x778e6408
27 Concurrency::accelerator::_Init dpcrt.cpp 62 0x778f2bcf
28 Concurrency::accelerator::accelerator amprt.h 1135 0xb851a9
29 Concurrency::details::_Array_view_base<1,1>::_Array_view_base<1,1> amp.h 1768 0xb848a9
30 Concurrency::array_view<int,1>::array_view<int,1> amp.h 2435 0xb84db1
31 AMPTest AMPtest.cpp 12 0xb83a56
32 MainWindow::AMPTester mainwindow.cpp 1454 0xb6070c
33 MainWindow::qt_static_metacall moc_mainwindow.cpp 121 0xb875e9
34 QMetaObject::activate qobject.cpp 3681 0x66aca819
35 QMetaObject::activate qobject.cpp 3547 0x66aca271
36 QAbstractButton::clicked moc_qabstractbutton.cpp 297 0x652717cb
37 QAbstractButtonPrivate::emitClicked qabstractbutton.cpp 544 0x64f1b3a7
38 QAbstractButtonPrivate::click qabstractbutton.cpp 536 0x64f1a92b
39 QAbstractButton::mouseReleaseEvent qabstractbutton.cpp 1141 0x64f19d92
40 QWidget::event qwidget.cpp 7966 0x64e0b9bc
41 QAbstractButton::event qabstractbutton.cpp 1098 0x64f198f1
42 QPushButton::event qpushbutton.cpp 682 0x64fdc50b
43 QApplicationPrivate::notify_helper qapplication.cpp 3499 0x64dc3a4e
44 QApplication::notify qapplication.cpp 3066 0x64dc024e
45 QCoreApplication::notifyInternal qcoreapplication.cpp 935 0x66a7f9f7
46 QCoreApplication::sendSpontaneousEvent qcoreapplication.h 240 0x66b96db8
47 QApplicationPrivate::sendMouseEvent qapplication.cpp 2539 0x64dc4cb3
48 QWidgetWindow::handleMouseEvent qwidgetwindow.cpp 507 0x64e4862b
49 QWidgetWindow::event qwidgetwindow.cpp 180 0x64e4780e
50 QApplicationPrivate::notify_helper qapplication.cpp 3499 0x64dc3a4e
51 QApplication::notify qapplication.cpp 2952 0x64dbfc17
52 QCoreApplication::notifyInternal qcoreapplication.cpp 935 0x66a7f9f7
53 QCoreApplication::sendSpontaneousEvent qcoreapplication.h 240 0x66b96db8
54 QGuiApplicationPrivate::processMouseEvent qguiapplication.cpp 1748 0xf56aaaf
55 QGuiApplicationPrivate::processWindowSystemEvent qguiapplication.cpp 1549 0xf56c9e9
56 QWindowSystemInterface::sendWindowSystemEvents qwindowsysteminterface.cpp 579 0xf54f241
57 QWindowsGuiEventDispatcher::sendPostedEvents qwindowsguieventdispatcher.cpp 89 0x774da7e1
58 qt_internal_proc qeventdispatcher_win.cpp 421 0x66b174e0
59 InternalCallWinProc USER32 0x750162fa
60 UserCallWinProcCheckWow USER32 0x75016d3a
61 DispatchMessageWorker USER32 0x750177c4
62 DispatchMessageW USER32 0x7501788a
63 QEventDispatcherWin32::processEvents qeventdispatcher_win.cpp 795 0x66b17fcf
64 QWindowsGuiEventDispatcher::processEvents qwindowsguieventdispatcher.cpp 80 0x774da6fc
65 QEventLoop::processEvents qeventloop.cpp 137 0x66a7b87c
66 QEventLoop::exec qeventloop.cpp 212 0x66a7ba72
67 QCoreApplication::exec qcoreapplication.cpp 1188 0x66a7e002
68 QGuiApplication::exec qguiapplication.cpp 1484 0xf569678
69 QApplication::exec qapplication.cpp 2745 0x64dbf719
70 main main.cpp 10 0xb57078
71 WinMain qtmain_win.cpp 131 0xb89a0a
72 __tmainCRTStartup crtexe.c 618 0xb88edf
73 WinMainCRTStartup crtexe.c 466 0xb88c9d
74 BaseThreadInitThunk kernel32 0x74ed338a
75 __RtlUserThreadStart ntdll 0x77199f72
76 _RtlUserThreadStart ntdll 0x77199f45

@

[technovelist]

As I like developing in VS, I decided to switch to the VS addin, which runs the C++ AMP code without crashing.

[develooper]

1. Can I download amp lib. and use in qt creator?
2. Can I download amp lib. and use in qt creator in linux?