mapped_array map(const cl::CommandQueue &q) {
return mapped_array(
static_cast<T*>(
q.enqueueMapBuffer(
buffer, CL_TRUE, CL_MAP_READ | CL_MAP_WRITE,
0, size() * sizeof(T)
)
),
buffer_unmapper(q, buffer)
);
}
reference_base(Container &rhs, difference_type index,
difference_type range, cl::CommandQueue queue):
container( rhs ), index( index ), range ( range ), queue(queue)
{
cl_int status = CL_SUCCESS;
//should we throw or map until container.size()?
assert( (index + range) < container.size() );
host_buffer = reinterpret_cast< naked_pointer >(
queue.enqueueMapBuffer( container.data(), true, CL_MAP_READ | CL_MAP_WRITE,
index * sizeof( value_type ),
range * sizeof( value_type ),
NULL, NULL, &status)
);
CLSPARSE_V( status, "Mapping device buffer on host failed" );
}
int ShowU8ImageGPUBuffer(cl::CommandQueue command_queue,
cl::Buffer buffer,
int width,
int height)
{
unsigned char *cpu = (unsigned char *)command_queue.enqueueMapBuffer(buffer,
CL_TRUE,
CL_MAP_WRITE,
0,
width * height);
Mat img_to_show(height, width, CV_8U, cpu);
ResizeImage(img_to_show, width, height);
imshow("u8", img_to_show);
waitKey();
command_queue.enqueueUnmapMemObject(buffer, cpu);
return (0);
}
NumList
mathViaOpenCL(cl::Context& context, cl::CommandQueue& queue,
cl::Kernel& kernel,
cl::KernelFunctor& vadd, const std::vector<Type>& vec1,
const std::vector<Type>& vec2) {
const int ROFlags = CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR;
const int RWFlags = CL_MEM_READ_WRITE | CL_MEM_USE_HOST_PTR;
const int byteSize = vec1.size() * sizeof(double);
// Create buffer for vec1 and vec2 and copy host contents
cl::Buffer vec1Buffer = cl::Buffer(context, ROFlags, byteSize,
const_cast<float*>(&vec1[0]));
cl::Buffer vec2Buffer = cl::Buffer(context, ROFlags, byteSize,
const_cast<float*>(&vec2[0]));
// Create buffer for result vector
NumList result(vec1.size());
cl::Buffer resBuffer = cl::Buffer(context, RWFlags, byteSize, &result[0]);
// Run the OpenCL kernel via the functor
vadd(vec1Buffer, vec2Buffer, resBuffer);
// Sync the OpenCL buffer with the host buffers
queue.enqueueMapBuffer(resBuffer, CL_TRUE, CL_MAP_READ, 0, byteSize);
return result;
}
int clPeak::runTransferBandwidthTest(cl::CommandQueue &queue, cl::Program &prog, device_info_t &devInfo)
{
if(!isTransferBW)
return 0;
float timed, gbps;
cl::NDRange globalSize, localSize;
cl::Context ctx = queue.getInfo<CL_QUEUE_CONTEXT>();
int iters = devInfo.transferBWIters;
Timer timer;
float *arr = NULL;
cl_uint maxItems = devInfo.maxAllocSize / sizeof(float) / 2;
cl_uint numItems;
// Set an upper-limit for cpu devies
if(devInfo.deviceType & CL_DEVICE_TYPE_CPU) {
numItems = roundToPowOf2(maxItems, 26);
} else {
numItems = roundToPowOf2(maxItems);
}
try
{
arr = new float[numItems];
cl::Buffer clBuffer = cl::Buffer(ctx, (CL_MEM_READ_WRITE | CL_MEM_ALLOC_HOST_PTR), (numItems * sizeof(float)));
log->print(NEWLINE TAB TAB "Transfer bandwidth (GBPS)" NEWLINE);
log->xmlOpenTag("transfer_bandwidth");
log->xmlAppendAttribs("unit", "gbps");
///////////////////////////////////////////////////////////////////////////
// enqueueWriteBuffer
log->print(TAB TAB TAB "enqueueWriteBuffer : ");
// Dummy warm-up
queue.enqueueWriteBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
queue.enqueueWriteBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr, NULL, &timeEvent);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
Timer timer;
timer.start();
for(int i=0; i<iters; i++)
{
queue.enqueueWriteBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
}
queue.finish();
timed = timer.stopAndTime();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
log->print(gbps); log->print(NEWLINE);
log->xmlRecord("enqueuewritebuffer", gbps);
///////////////////////////////////////////////////////////////////////////
// enqueueReadBuffer
log->print(TAB TAB TAB "enqueueReadBuffer : ");
// Dummy warm-up
queue.enqueueReadBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
queue.enqueueReadBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr, NULL, &timeEvent);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
Timer timer;
timer.start();
for(int i=0; i<iters; i++)
{
queue.enqueueReadBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
}
queue.finish();
timed = timer.stopAndTime();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
log->print(gbps); log->print(NEWLINE);
log->xmlRecord("enqueuereadbuffer", gbps);
///////////////////////////////////////////////////////////////////////////
// enqueueMapBuffer
log->print(TAB TAB TAB "enqueueMapBuffer(for read) : ");
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_READ, 0, (numItems * sizeof(float)), NULL, &timeEvent);
queue.finish();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
for(int i=0; i<iters; i++)
{
Timer timer;
void *mapPtr;
timer.start();
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_READ, 0, (numItems * sizeof(float)));
queue.finish();
timed += timer.stopAndTime();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
}
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
log->print(gbps); log->print(NEWLINE);
log->xmlRecord("enqueuemapbuffer", gbps);
///////////////////////////////////////////////////////////////////////////
// memcpy from mapped ptr
log->print(TAB TAB TAB TAB "memcpy from mapped ptr : ");
queue.finish();
timed = 0;
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_READ, 0, (numItems * sizeof(float)));
queue.finish();
timer.start();
memcpy(arr, mapPtr, (numItems * sizeof(float)));
timed += timer.stopAndTime();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
log->print(gbps); log->print(NEWLINE);
log->xmlRecord("memcpy_from_mapped_ptr", gbps);
///////////////////////////////////////////////////////////////////////////
// enqueueUnmap
log->print(TAB TAB TAB "enqueueUnmap(after write) : ");
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_WRITE, 0, (numItems * sizeof(float)));
queue.finish();
queue.enqueueUnmapMemObject(clBuffer, mapPtr, NULL, &timeEvent);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
for(int i=0; i<iters; i++)
{
Timer timer;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_WRITE, 0, (numItems * sizeof(float)));
queue.finish();
timer.start();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
timed += timer.stopAndTime();
}
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
log->print(gbps); log->print(NEWLINE);
log->xmlRecord("enqueueunmap", gbps);
///////////////////////////////////////////////////////////////////////////
// memcpy to mapped ptr
log->print(TAB TAB TAB TAB "memcpy to mapped ptr : ");
queue.finish();
timed = 0;
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_WRITE, 0, (numItems * sizeof(float)));
queue.finish();
timer.start();
memcpy(mapPtr, arr, (numItems * sizeof(float)));
timed += timer.stopAndTime();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
log->print(gbps); log->print(NEWLINE);
log->xmlRecord("memcpy_to_mapped_ptr", gbps);
///////////////////////////////////////////////////////////////////////////
log->xmlCloseTag(); // transfer_bandwidth
if(arr) delete [] arr;
}
catch(cl::Error error)
{
stringstream ss;
ss << error.what() << " (" << error.err() << ")" NEWLINE
<< TAB TAB TAB "Tests skipped" NEWLINE;
log->print(ss.str());
if(arr) delete [] arr;
return -1;
}
return 0;
}
int clPeak::runTransferBandwidthTest(cl::CommandQueue &queue, cl::Program &prog, device_info_t &devInfo)
{
if(!isTransferBW)
return 0;
float timed, gbps;
cl::NDRange globalSize, localSize;
cl::Context ctx = queue.getInfo<CL_QUEUE_CONTEXT>();
int iters = devInfo.transferBWIters;
Timer timer;
cl_uint maxItems = devInfo.maxAllocSize / sizeof(float) / 2;
cl_uint numItems;
// Set an upper-limit for cpu devies
if(devInfo.deviceType & CL_DEVICE_TYPE_CPU) {
numItems = roundToPowOf2(maxItems, 26);
} else {
numItems = roundToPowOf2(maxItems);
}
float *arr = new float[numItems];
try
{
cl::Buffer clBuffer = cl::Buffer(ctx, (CL_MEM_READ_WRITE | CL_MEM_ALLOC_HOST_PTR), (numItems * sizeof(float)));
cout << NEWLINE TAB TAB "Transfer bandwidth (GBPS)" << endl;
cout << setprecision(2) << fixed;
///////////////////////////////////////////////////////////////////////////
// enqueueWriteBuffer
cout << TAB TAB TAB "enqueueWriteBuffer : "; cout.flush();
// Dummy warm-up
queue.enqueueWriteBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
queue.enqueueWriteBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr, NULL, &timeEvent);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
Timer timer;
timer.start();
for(int i=0; i<iters; i++)
{
queue.enqueueWriteBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
}
queue.finish();
timed = timer.stopAndTime();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
cout << gbps << endl;
///////////////////////////////////////////////////////////////////////////
// enqueueReadBuffer
cout << TAB TAB TAB "enqueueReadBuffer : "; cout.flush();
// Dummy warm-up
queue.enqueueReadBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
queue.enqueueReadBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr, NULL, &timeEvent);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
Timer timer;
timer.start();
for(int i=0; i<iters; i++)
{
queue.enqueueReadBuffer(clBuffer, CL_TRUE, 0, (numItems * sizeof(float)), arr);
}
queue.finish();
timed = timer.stopAndTime();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
cout << gbps << endl;
///////////////////////////////////////////////////////////////////////////
// enqueueMapBuffer
cout << TAB TAB TAB "enqueueMapBuffer(for read) : "; cout.flush();
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_READ, 0, (numItems * sizeof(float)), NULL, &timeEvent);
queue.finish();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
for(int i=0; i<iters; i++)
{
Timer timer;
void *mapPtr;
timer.start();
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_READ, 0, (numItems * sizeof(float)));
queue.finish();
timed += timer.stopAndTime();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
}
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
cout << gbps << endl;
///////////////////////////////////////////////////////////////////////////
// memcpy from mapped ptr
cout << TAB TAB TAB TAB "memcpy from mapped ptr : "; cout.flush();
queue.finish();
timed = 0;
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_READ, 0, (numItems * sizeof(float)));
queue.finish();
timer.start();
memcpy(arr, mapPtr, (numItems * sizeof(float)));
timed += timer.stopAndTime();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
cout << gbps << endl;
///////////////////////////////////////////////////////////////////////////
// enqueueUnmap
cout << TAB TAB TAB "enqueueUnmap(after write) : "; cout.flush();
queue.finish();
timed = 0;
if(useEventTimer)
{
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_WRITE, 0, (numItems * sizeof(float)));
queue.finish();
queue.enqueueUnmapMemObject(clBuffer, mapPtr, NULL, &timeEvent);
queue.finish();
timed += timeInUS(timeEvent);
}
} else
{
for(int i=0; i<iters; i++)
{
Timer timer;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_WRITE, 0, (numItems * sizeof(float)));
queue.finish();
timer.start();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
timed += timer.stopAndTime();
}
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
cout << gbps << endl;
///////////////////////////////////////////////////////////////////////////
// memcpy to mapped ptr
cout << TAB TAB TAB TAB "memcpy to mapped ptr : "; cout.flush();
queue.finish();
timed = 0;
for(int i=0; i<iters; i++)
{
cl::Event timeEvent;
void *mapPtr;
mapPtr = queue.enqueueMapBuffer(clBuffer, CL_TRUE, CL_MAP_WRITE, 0, (numItems * sizeof(float)));
queue.finish();
timer.start();
memcpy(mapPtr, arr, (numItems * sizeof(float)));
timed += timer.stopAndTime();
queue.enqueueUnmapMemObject(clBuffer, mapPtr);
queue.finish();
}
timed /= iters;
gbps = ((float)numItems * sizeof(float)) / timed / 1e3f;
cout << gbps << endl;
///////////////////////////////////////////////////////////////////////////
}
catch(cl::Error error)
{
cerr << error.what() << "(" << error.err() << ")" << endl;
cerr << TAB TAB TAB "Tests skipped" << endl;
if(arr) delete [] arr;
return -1;
}
if(arr) delete [] arr;
return 0;
}
PetscErrorCode ComputeResidual(TS ts,
PetscScalar t,
Vec Prim, Vec dPrim_dt,
Vec F, void *ptr)
{
PetscErrorCode ierr;
PetscScalar *prim, *dprim_dt, *f;
// Get pointers to Petsc Vecs so that we can access the data.
ierr = VecGetArray(Prim, &prim); CHKERRQ(ierr);
ierr = VecGetArray(dPrim_dt, &dprim_dt); CHKERRQ(ierr);
ierr = VecGetArray(F, &f); CHKERRQ(ierr);
// OpenCL buffers.
cl::Buffer primBuffer, dprimBuffer_dt, fbuffer;
PetscInt size = DOF*N1*N2*sizeof(PetscScalar);
// Create OpenCL buffers from the data pointers to Petsc Vecs.
primBuffer = cl::Buffer(context,
CL_MEM_USE_HOST_PTR | CL_MEM_READ_ONLY,
size, &(prim[0]), &clErr);
dprimBuffer_dt = cl::Buffer(context,
CL_MEM_USE_HOST_PTR | CL_MEM_READ_ONLY,
size, &(dprim_dt[0]), &clErr);
fbuffer = cl::Buffer(context,
CL_MEM_USE_HOST_PTR | CL_MEM_WRITE_ONLY,
size, &(f[0]), &clErr);
// Set kernel args.
clErr = kernel.setArg(0, primBuffer);
clErr = kernel.setArg(1, dprimBuffer_dt);
clErr = kernel.setArg(2, fbuffer);
// Kernel launch parameters and execution.
cl::NDRange global(N1, N2);
cl::NDRange local(TILE_SIZE_X1, TILE_SIZE_X2);
clErr = queue.enqueueNDRangeKernel(kernel,
cl::NullRange,
global, local,
NULL, NULL);
// The following "buffer mapping" is not needed if running on CPU but is
// needed if the OpenCL device executing the kernel is a GPU in order to
// sync the data. For CPUs this routine is zero cost when used with buffers
// created using CL_MEM_USE_HOST_PTR like we did above. For GPUs, the GPU
// will access the data on the RAM as and when needed automatically without
// user intervention.
f = (PetscScalar*)queue.enqueueMapBuffer(fbuffer,
CL_FALSE,
CL_MAP_READ,
0, size,
NULL, NULL, &clErr);
// Global sync point for all the threads to ensure execution is complete.
clErr = queue.finish();
// Restore the pointers.
ierr = VecRestoreArray(Prim, &prim); CHKERRQ(ierr);
ierr = VecRestoreArray(dPrim_dt, &dprim_dt); CHKERRQ(ierr);
ierr = VecRestoreArray(F, &f); CHKERRQ(ierr);
return(0);
}
