Question

In C++ AMP, how does one detect and enumerate all C++ AMP accelerators?

Don McCrady distributed an app here that enumerates non-emulated accelerators. Though I had a DX11 card (GTX 260), I didn’t see any available accelerators. Daniel Moth shows here how to query an individual accelerator, but I couldn’t find how do enumerate all (emulated and non) accelerators using a C++ AMP call.

Answer 1

Looks like it’s pretty simple: concurrency::get_accelerators(); Daniel Moth comments:

in the VS 11 Developer Preview bits, you simply call concurrency::get_accelerators();. We are working to make that more discoverable for the Beta, whenever that is.

Here’s my code:

#include <iostream>
#include "stdafx.h"
#include "amp.h"

using namespace std;
using namespace concurrency;

void inspect_accelerators()
{
    auto accelerators = accelerator::get_all();
    for_each(begin(accelerators), end(accelerators),[=](accelerator acc){ 
        wcout << "New accelerator: " << acc.description << endl;
        wcout << "is_debug = " << acc.is_debug << endl;
        wcout << "is_emulated = " << acc.is_emulated <<endl;
        wcout << "dedicated_memory = " << acc.dedicated_memory << endl;
        wcout << "device_path = " << acc.device_path << endl;
        wcout << "has_display = " << acc.has_display << endl;                
        wcout << "version = " << (acc.version >> 16) << '.' << (acc.version & 0xFFFF) << endl;
    });
}

Update 1:

As of VS 11 Beta, this is now accelerator::get_all();