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/* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <string.h>
#include <helper_cuda.h>
#include <cuda.h>
#include <cuda_runtime_api.h>
cudaError_t setProp(CUmemAllocationProp *prop, bool UseCompressibleMemory)
{
CUdevice currentDevice;
if (cuCtxGetDevice(¤tDevice) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
memset(prop, 0, sizeof(CUmemAllocationProp));
prop->type = CU_MEM_ALLOCATION_TYPE_PINNED;
prop->location.type = CU_MEM_LOCATION_TYPE_DEVICE;
prop->location.id = currentDevice;
if (UseCompressibleMemory)
prop->allocFlags.compressionType = CU_MEM_ALLOCATION_COMP_GENERIC;
return cudaSuccess;
}
cudaError_t allocateCompressible(void **adr, size_t size, bool UseCompressibleMemory)
{
CUmemAllocationProp prop = {};
cudaError_t err = setProp(&prop, UseCompressibleMemory);
if (err != cudaSuccess)
return err;
size_t granularity = 0;
if (cuMemGetAllocationGranularity(&granularity, &prop,
CU_MEM_ALLOC_GRANULARITY_MINIMUM) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
size = ((size - 1) / granularity + 1) * granularity;
CUdeviceptr dptr;
if (cuMemAddressReserve(&dptr, size, 0, 0, 0) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
CUmemGenericAllocationHandle allocationHandle;
if (cuMemCreate(&allocationHandle, size, &prop, 0) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
// Check if cuMemCreate was able to allocate compressible memory.
if (UseCompressibleMemory) {
CUmemAllocationProp allocationProp = {};
cuMemGetAllocationPropertiesFromHandle(&allocationProp, allocationHandle);
if (allocationProp.allocFlags.compressionType != CU_MEM_ALLOCATION_COMP_GENERIC) {
printf("Could not allocate compressible memory... so waiving execution\n");
exit(EXIT_WAIVED);
}
}
if (cuMemMap(dptr, size, 0, allocationHandle, 0) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
if (cuMemRelease(allocationHandle) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
CUmemAccessDesc accessDescriptor;
accessDescriptor.location.id = prop.location.id;
accessDescriptor.location.type = prop.location.type;
accessDescriptor.flags = CU_MEM_ACCESS_FLAGS_PROT_READWRITE;
if (cuMemSetAccess(dptr, size, &accessDescriptor, 1) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
*adr = (void *)dptr;
return cudaSuccess;
}
cudaError_t freeCompressible(void *ptr, size_t size, bool UseCompressibleMemory)
{
CUmemAllocationProp prop = {};
cudaError_t err = setProp(&prop, UseCompressibleMemory);
if (err != cudaSuccess)
return err;
size_t granularity = 0;
if (cuMemGetAllocationGranularity(&granularity, &prop,
CU_MEM_ALLOC_GRANULARITY_MINIMUM) != CUDA_SUCCESS)
return cudaErrorMemoryAllocation;
size = ((size - 1) / granularity + 1) * granularity;
if (ptr == NULL)
return cudaSuccess;
if (cuMemUnmap((CUdeviceptr)ptr, size) != CUDA_SUCCESS ||
cuMemAddressFree((CUdeviceptr)ptr, size) != CUDA_SUCCESS)
return cudaErrorInvalidValue;
return cudaSuccess;
}
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