是否有适用于Mac OS X 10.8的opencl分析器? [英] Is there an opencl profiler for mac os X 10.8?

问题描述

我正在尝试在OpenCL内核中找到瓶颈，是否可以在Mac OS X上分析OpenCL程序?我在 http://www.gremedy.com/上找到了gDebugger，但是它需要10.5或10.6才能运行. AMD SDK仅支持Linux和Windows.

I am trying to find the bottleneck in my OpenCL kernel, is it possible to profile OpenCL programms on mac os X? I found gDebugger on http://www.gremedy.com/, but it requires 10.5 or 10.6 to run. AMD SDK supports only Linux and Windows.

山狮有探查器吗?

推荐答案

分析信息必须有多详细? 可以使用内置的内部事件探查器吗?
可以使用CL_QUEUE_PROFILING_ENABLE标志创建OpenCL队列.

How detailed must your profiling information be? Is it okay to use the built-in internal profiler?
OpenCL queues can be created with the CL_QUEUE_PROFILING_ENABLE flag.

这样，您可以看到每个执行的内核:
什么时候来了

This way you can see for each kernel you executed:
When it has been

• 已入队
• 提交给您的OCL设备
• 开始
• 已结束

使用 C ++绑定，队列的创建如下所示:

With C++-Bindings, the creation of the queue can look like this:

_queue = new cl::CommandQueue(_context, _device, CL_QUEUE_PROFILING_ENABLE );

分析信息的提取看起来像这样:

The extration of the profiling information looks like this:

1)保存要分析的已排队内核提供的事件对象(在数组中).

1) Save the event object (in an array) delivered by the enqueued kernel you want to profile.

cl::Event evt;
_queue->enqueueNDRangeKernel( _kernel, cl::NullRange, _range, cl::NullRange, NULL, &evt); 

2)执行队列后，提取性能分析信息

2) After execution of the queue, extract the profiling information

std::vector<cl::Event> evts;

//add all events to this vector here
//cl::Event evt;
//_queue->enqueueNDRangeKernel( _kernel, cl::NullRange, _range, cl::NullRange, NULL, &evt); 
//evts.push_back(evt);

uint64_t param;
for (unsigned int i=0; i<evts.size(); i++)
{
    evts[i].getProfilingInfo(CL_PROFILING_COMMAND_QUEUED, &param);
    printf("%u: %llu", i, param);
    evts[i].getProfilingInfo(CL_PROFILING_COMMAND_SUBMIT, &param);
    printf(" %llu", param);
    evts[i].getProfilingInfo(CL_PROFILING_COMMAND_START, &param);
    printf(" %llu", param);
    evts[i].getProfilingInfo(CL_PROFILING_COMMAND_END, &param);
    printf(" %llu\n", param);
}

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