What’s New in Visual Studio 2013 for C++ DevelopersTarek MadkourGroup Program Manager – Visual C++2-305
performancecompatibilityportability
1. Performance2. Compatibility3. Portability
Agenda
0. Windows 8.1 Tools
4. Productivity
0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity
Agenda
Connected Windows Store AppsVisual Studio 2013 makes it easier to:• Update your app tile using mobile services• Send push notifications to your Windows Store app• Accessing Azure mobile services backend capabilities
How?• New C++ library for Azure mobile services• Integrated VS tools
Better XAML DesignerNew and updated templatesImproved XAML editorRulers and dynamic guidesNew Windows 8.1 controlsImproved Designer performanceBetter in-place style and template editing
Powerful Graphics DebuggingVS2012 introduced DirectX-based Graphics debugging tools in VS Professional, Premium and Ultimate
VS2013 adds:• Support in VS Express• Capturing frames from
remote machines• Compute shader
debugging• Faster frame capture
Deeper DiagnosticsDiagnostics hub• XAML UI responsiveness profiling• Energy profiler• CPU profilingBetter WinRT Exception debugging‘Just My Code’ debuggingImproved Async debuggingJavaScript/C++ interop debuggingC#/C++ interop debugging *ARM dump debugging *
C++/CX• Boxed types in WinRT structs value struct Person { IBox<int>^ Age; }
• Overriding ToString() ref struct Person { public: String^ Name; virtual String^ ToString() override { return Name; } }
• Improved WinRT exceptions• Retains stack trace and message
string across the ABI• Developers can specify custom
message strings
• Faster performance• Ref classes instantiate faster, have
more compact layouts in memory• Boxing and factory caching
improved to speed up XAML scenarios
• Facilitated inlining and other code optimizations
Windows 8.1 Toolsdemo
0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity
Agenda
Performance Optimizations RecapCompilation Unit Optimizations• /O2 and friends
Whole Program Optimizations• /GL and /LTCG
.cpp
.cpp .obj
.obj.exe
.cpp
.cpp .obj
.obj.exe
.cpp
.cpp .obj
.obj.exe
Run TrainingScenario
s.exe
Profile-Guided Optimizations• /LTCG:PGI and /LTCG:PGO
Automatic VectorizationVS 2012:• Uses “vector” instructions where
possible in loops
VS 2013 adds:• Statement level vectorization• Permutation of perfect loop nests• Range propagation optimizations• Support for more operations:
min/max, converts, shifts, byteswap, averaging
• Reductions into array elements• __restrict support for vector alias
checking• Improvements to data dependence
analysis• C++ pointer vectorization• Gather / scatter optimizations
for (i = 0; i < 1000; i++) { A[i] = B[i] + C[i];}
+r1 r2
r3
add r3, r1, r2
SCALAR(1 operation)
v1 v2
v3+
vectorlength
vadd v3, v1, v2
VECTOR(N operations)
Automatic Vectorization// STL – pointers everywhere; not even a loop counter variablevoid transform1(const int * first1, const int * last1, const int * first2, int * result) { while (first1 != last1) { //converted to integer *result++ = *first1++ + *first2++; // make these array references }}// DirectX – no loops here! Vectorize operations on adjacent memory cellsvoid four_vector_example(XMVECTOR V) { XMVECTOR Result; Result.vector4_f32[0] = 1.f / V.vector4_f32[0]; Result.vector4_f32[1] = 1.f / V.vector4_f32[1]; Result.vector4_f32[2] = 1.f / V.vector4_f32[2]; Result.vector4_f32[3] = 1.f / V.vector4_f32[3]; return Result;}
// Machine Vision Libraryvoid machine_vision_filter_example (int *A, int boxStart) { for (int i = 0; i < 100; i++) A[boxStart + i] = A[boxStart + i] + 1;}
Vector Calling Conventionstruct Particle { __m256 x; __m256 y; __m256 z; __m256 w; };Particle __vectorcall foo(Particle a, __m256 scale){ Particle t; t.x = _mm256_mul_ps(a.x, scale); t.y = _mm256_mul_ps(a.y, scale); t.z = _mm256_mul_ps(a.z, scale); t.w = _mm256_mul_ps(a.w, scale); return t;}
Reduces instruction count
Minimizes stack allocation
Use /Gv for whole module
C++ AMPIn VS2012:• Programming model for heterogeneous computing• Allowed C++ code to run on the GPU for general-purpose computation• STL-like library for multidimensional data
VS2013 adds:• Shared memory support to eliminate/reduce copying of data between CPU and GPU• Enhanced texture support: texture sampling, mipmap support and staging textures• C++ AMP debugging on Win7 and side-by-side CPU/GPU debugging• Faster C++ AMP runtime: improved copy performance, reduce launch overhead• Better DirectX interop support• Improved C++ AMP runtime diagnostics• Improvements to array_view APIs
0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity
Agenda
C++11
We have a lot here …
see Herb’s talk on Friday at noon.
0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity
Agenda
C++ REST SDKCloud-based client-server communications library for C++
Basics:• Connecting and interacting with RESTful services• Uncompromised performance and productivity• Asynchrony for responsiveness and scalability• Uses modern C++11 patterns• Cross-platform enabled and OSS
C++ REST SDKHTTP Client to send requests and handle responsesJSON library for constructing, parsing and serializing JSON objects.Asynchronous Streams and Stream Buffers for reading/writing bytes to/from an underlying medium.
http://casablanca.codeplex.com
Basic HTTP Clienthttp_client client(L"http://www.myhttpserver.com");http_request request(methods::GET);
client.request(request).then([](http_response response){ // Perform actions here to inspect the HTTP response... if(response.status_code() == status_codes::OK) { }});
Make an HTTP request to get a JSON valuevoid RequestJSONValue()
{ http_client client(L"http://www.myhttpserver.com"); client.request(methods::GET).then([](http_response response) { if(response.status_code() == status_codes::OK) { return response.extract_json(); } // Handle error cases, for now return null json value... return task_from_result(json::value()); }) .then([](json::value v) { // Perform actions here to process the JSON value... });}
C++ REST SDKdemo
0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity
Agenda
NuGetEasy acquisition and usage of compatible libraries in C++ projects
Library vendors can expose their libraries as NuGet packages using available toolshttp://blogs.msdn.com/b/vcblog/archive/2013/04/26/nuget-for-c.aspx
IDE Enhancementsdemo
Code Formatting
Configurable options for indentation, space, new lines and wrapping
Automatically applied while typing, pasting or formatting
Header / Code Switching
Brace Completion
Code PeekView type definitions without leaving the current open file
Code Analysis UI Enhancements
Filter on categories and sort on various fields to help focus on important problems first
Async DebuggingSupports Windows Store and Desktop appsRequires Windows 8.1Enhancements to the Call Stack and Tasks window Answers the questions “Why am I here?” & “What is going on right now?”
“Just My Code” debuggingHelps developer focus on code they authored
Call Stack window hides non-user code
Non-user code defined in configurable .natjmc file
Not used during stepping
Interop debuggingMultiple flavors of interop debugging enabled:• JavaScript / C++• C# / VB / C++ • CPython / C++• GPU / CPU
Enable by choosing an option in the Project PropertiesBreak in the debugger in either C++ or JS/C#/VB/Python code• Breakpoint | Exception | Break All (pause icon)Inspect state, e.g. in Locals, Call Stack
ResourcesVisual C++ Blog
http://blogs.msdn.com/vcblog
Visual C++ Developer Centerhttp://msdn.microsoft.com/en-us/visualc/default.aspx
Other C++ Sessions at //BUILDThu 11:30am
3-141 DirectX Graphics Debugging Tools
Fri 10:30am
4-329 Native Code Performance and Memory: The Elephant in the CPU
2-211 Windows Phone: Using Native (C++) Code in Your Apps
Fri 12:00pm
2-306 The Future of C++
3-308 C++/CX Best Practices
What?• Are you interested
in having an impact on the future user experiences in Visual Studio? Come help us shape the future.
Give us your feedback!When & Where?• Schedule a time
with us [email protected]
• Room 254 South
Moscone, West Mezzanine Level
Why?• Your input and
feedback will influence future Microsoft Visual Studio tools
Give us your feedback!
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