amilanov-amd
612 řádky
19 KiB
C++
612 řádky
19 KiB
C++
/*
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Copyright (c) 2022-2023 Advanced Micro Devices, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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/**
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* @addtogroup hipDrvMemcpy3D hipDrvMemcpy3D
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* @{
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* @ingroup MemoryTest
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* `hipMemcpy3D(const hipMemcpy3DParms* p)` -
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* Copies data between 3D objects.
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*/
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/*
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* Test Scenarios
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* 1. Verifying hipDrvMemcpy3D API for H2A,A2A,A2H scenarios
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* 2. Verifying hipDrvMemcpy3D API for H2D,D2D,D2H scenarios
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* 3. Verifying Negative Scenarios
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* 4. Verifying Extent validation scenarios by passing 0
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* 5. Verifying hipDrvMemcpy3D API by allocating Memory in
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* one GPU and trigger hipDrvMemcpy3D from peer GPU for
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* H2D,D2D,D2H scenarios
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* 6. Verifying hipDrvMemcpy3D API by allocating Memory in
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* one GPU and trigger hipDrvMemcpy3D from peer GPU for
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* H2A,A2A,A2H scenarios
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*
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* Scenarios 3 is temporarily suspended on AMD
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* Scenario 5&6 are not supported in CUDA platform
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*/
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#include <hip_test_common.hh>
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#include <hip_test_checkers.hh>
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template <typename T> class DrvMemcpy3D {
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int width, height, depth;
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unsigned int size;
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hipArray_Format formatKind;
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hipArray_t arr, arr1;
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size_t pitch_D, pitch_E;
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HIP_MEMCPY3D myparms;
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hipDeviceptr_t D_m, E_m;
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T* hData{nullptr};
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public:
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DrvMemcpy3D(int l_width, int l_height, int l_depth, hipArray_Format l_format);
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DrvMemcpy3D() = delete;
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void AllocateMemory();
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void SetDefaultData();
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void HostArray_DrvMemcpy3D(bool device_context_change = false);
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void HostDevice_DrvMemcpy3D(bool device_context_change = false);
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void Extent_Validation();
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void NegativeTests();
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void DeAllocateMemory();
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};
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/* Intializes class variables */
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template <typename T>
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DrvMemcpy3D<T>::DrvMemcpy3D(int l_width, int l_height, int l_depth, hipArray_Format l_format) {
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width = l_width;
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height = l_height;
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depth = l_depth;
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formatKind = l_format;
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}
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/* Allocating Memory */
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template <typename T> void DrvMemcpy3D<T>::AllocateMemory() {
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size = width * height * depth * sizeof(T);
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hData = reinterpret_cast<T*>(malloc(size));
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memset(hData, 0, size);
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for (int i = 0; i < depth; i++) {
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for (int j = 0; j < height; j++) {
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for (int k = 0; k < width; k++) {
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hData[i * width * height + j * width + k] = i * width * height + j * width + k;
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}
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}
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}
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HIP_CHECK(hipMallocPitch(reinterpret_cast<void**>(&D_m), &pitch_D, width * sizeof(T), height));
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HIP_CHECK(hipMallocPitch(reinterpret_cast<void**>(&E_m), &pitch_E, width * sizeof(T), height));
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HIP_ARRAY3D_DESCRIPTOR* desc;
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desc = reinterpret_cast<HIP_ARRAY3D_DESCRIPTOR*>(malloc(sizeof(HIP_ARRAY3D_DESCRIPTOR)));
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desc->Format = formatKind;
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desc->NumChannels = 1;
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desc->Width = width;
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desc->Height = height;
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desc->Depth = depth;
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desc->Flags = hipArrayDefault;
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HIP_CHECK(hipArray3DCreate(&arr, desc));
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HIP_CHECK(hipArray3DCreate(&arr1, desc));
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}
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/* Setting the default data */
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template <typename T> void DrvMemcpy3D<T>::SetDefaultData() {
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memset(&myparms, 0x0, sizeof(HIP_MEMCPY3D));
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myparms.srcXInBytes = 0;
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myparms.srcY = 0;
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myparms.srcZ = 0;
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myparms.srcLOD = 0;
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myparms.dstXInBytes = 0;
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myparms.dstY = 0;
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myparms.dstZ = 0;
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myparms.dstLOD = 0;
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myparms.WidthInBytes = width * sizeof(T);
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myparms.Height = height;
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myparms.Depth = depth;
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}
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/*
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This function verifies the negative scenarios of
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hipDrvMemcpy3D API
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*/
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template <typename T> void DrvMemcpy3D<T>::NegativeTests() {
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HIP_CHECK(hipSetDevice(0));
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AllocateMemory();
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SetDefaultData();
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int deviceId;
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HIP_CHECK(hipGetDevice(&deviceId));
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unsigned int MaxPitch;
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HIP_CHECK(hipDeviceGetAttribute(reinterpret_cast<int*>(&MaxPitch), hipDeviceAttributeMaxPitch,
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deviceId));
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myparms.srcHost = hData;
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myparms.dstArray = arr;
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myparms.srcPitch = width * sizeof(T);
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myparms.srcHeight = height;
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myparms.srcMemoryType = hipMemoryTypeHost;
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myparms.dstMemoryType = hipMemoryTypeArray;
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SECTION("Passing nullptr to Source Host") {
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myparms.srcHost = nullptr;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Passing both dst host and device") {
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myparms.dstHost = hData;
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myparms.dstArray = nullptr;
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myparms.dstDevice = D_m;
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myparms.WidthInBytes = pitch_D;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Passing max value to WidthInBytes") {
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myparms.WidthInBytes = std::numeric_limits<int>::max();
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myparms.Height = std::numeric_limits<int>::max();
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myparms.Depth = std::numeric_limits<int>::max();
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Passing width > max width size") {
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myparms.WidthInBytes = width * sizeof(T) + 1;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Passing height > max height size") {
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myparms.Height = height + 1;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Passing depth > max depth size") {
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myparms.Depth = depth + 1;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("widthinbytes + srcXinBytes is out of bound") {
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myparms.srcXInBytes = 1;
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myparms.dstArray = nullptr;
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myparms.dstDevice = hipDeviceptr_t(D_m);
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myparms.dstPitch = pitch_D;
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myparms.dstHeight = height;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("widthinbytes + dstXinBytes is out of bound") {
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myparms.dstXInBytes = pitch_D;
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myparms.dstArray = nullptr;
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myparms.dstDevice = hipDeviceptr_t(D_m);
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myparms.dstPitch = pitch_D;
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myparms.dstHeight = height;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("srcY + height is out of bound") {
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myparms.srcY = 1;
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myparms.dstArray = nullptr;
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myparms.dstDevice = hipDeviceptr_t(D_m);
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myparms.dstPitch = pitch_D;
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myparms.dstHeight = height;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("dstY + height out of bounds") {
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myparms.dstY = 1;
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myparms.dstArray = nullptr;
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myparms.dstDevice = hipDeviceptr_t(D_m);
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myparms.dstPitch = pitch_D;
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myparms.dstHeight = height;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("src pitch greater than Max allowed pitch") {
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myparms.srcMemoryType = hipMemoryTypeDevice;
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myparms.dstMemoryType = hipMemoryTypeHost;
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myparms.srcDevice = D_m;
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myparms.srcHost = nullptr;
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myparms.srcPitch = MaxPitch;
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myparms.srcHeight = height;
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myparms.dstHost = hData;
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myparms.dstArray = nullptr;
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myparms.dstPitch = width * sizeof(T);
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myparms.dstHeight = height;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("dst pitch greater than Max allowed pitch") {
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myparms.dstDevice = hipDeviceptr_t(D_m);
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myparms.dstArray = nullptr;
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myparms.dstPitch = MaxPitch + 1;
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myparms.dstHeight = height;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Nullptr to src/dst device") {
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myparms.dstDevice = hipDeviceptr_t(nullptr);
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myparms.dstArray = nullptr;
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myparms.dstPitch = pitch_D;
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myparms.dstHeight = height;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Nullptr to src/dst array") {
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myparms.dstArray = nullptr;
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REQUIRE(hipDrvMemcpy3D(&myparms) != hipSuccess);
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}
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SECTION("Nullptr to hipDrvMemcpy3D") { REQUIRE(hipDrvMemcpy3D(nullptr) != hipSuccess); }
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DeAllocateMemory();
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}
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/*
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This function verifies the Extent validation scenarios of
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hipDrvMemcpy3D API
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*/
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template <typename T> void DrvMemcpy3D<T>::Extent_Validation() {
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HIP_CHECK(hipSetDevice(0));
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// Allocating the memory
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AllocateMemory();
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// Setting default data
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SetDefaultData();
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myparms.srcMemoryType = hipMemoryTypeHost;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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myparms.srcHost = hData;
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myparms.srcPitch = width * sizeof(T);
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myparms.srcHeight = height;
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myparms.dstDevice = D_m;
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myparms.dstPitch = pitch_D;
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myparms.dstHeight = height;
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SECTION("WidthInBytes is 0") {
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myparms.WidthInBytes = 0;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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}
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SECTION("Height is 0") {
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myparms.Height = 0;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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}
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SECTION("Depth is 0") {
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myparms.Depth = 0;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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}
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DeAllocateMemory();
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}
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/*
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This Function verifies following functionalities of hipDrvMemcpy3D API
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1. Host to Device copy
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2. Device to Device
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3. Device to Host
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In the end validates the results.
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This functionality is verified in 2 scenarios
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1. Basic scenario on same GPU device
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2. Device context change scenario where memory is allocated in 1 GPU
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and hipDrvMemcpy3D API is trigerred from another GPU
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*/
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template <typename T> void DrvMemcpy3D<T>::HostDevice_DrvMemcpy3D(bool device_context_change) {
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HIP_CHECK(hipSetDevice(0));
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bool skip_test = false;
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int peerAccess = 0;
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AllocateMemory();
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if (device_context_change) {
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HIP_CHECK(hipDeviceCanAccessPeer(&peerAccess, 0, 1));
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if (!peerAccess) {
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WARN("skipped the testcase as no peer access");
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skip_test = true;
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} else {
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HIP_CHECK(hipSetDevice(1));
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}
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}
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if (!skip_test) {
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SetDefaultData();
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myparms.srcMemoryType = hipMemoryTypeHost;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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myparms.srcHost = hData;
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myparms.srcPitch = width * sizeof(T);
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myparms.srcHeight = height;
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myparms.dstDevice = hipDeviceptr_t(D_m);
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myparms.dstPitch = pitch_D;
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myparms.dstHeight = height;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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// Device to Device
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SetDefaultData();
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myparms.srcMemoryType = hipMemoryTypeDevice;
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myparms.dstMemoryType = hipMemoryTypeDevice;
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myparms.srcDevice = hipDeviceptr_t(D_m);
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myparms.srcPitch = pitch_D;
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myparms.srcHeight = height;
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myparms.dstDevice = hipDeviceptr_t(E_m);
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myparms.dstPitch = pitch_E;
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myparms.dstHeight = height;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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T* hOutputData = reinterpret_cast<T*>(malloc(size));
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memset(hOutputData, 0, size);
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// Device to host
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SetDefaultData();
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myparms.srcMemoryType = hipMemoryTypeDevice;
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myparms.dstMemoryType = hipMemoryTypeHost;
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myparms.srcDevice = hipDeviceptr_t(E_m);
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myparms.srcPitch = pitch_E;
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myparms.srcHeight = height;
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myparms.dstHost = hOutputData;
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myparms.dstPitch = width * sizeof(T);
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myparms.dstHeight = height;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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HipTest::checkArray(hData, hOutputData, width, height, depth);
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free(hOutputData);
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}
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DeAllocateMemory();
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}
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/*
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This Function verifies following functionalities of hipDrvMemcpy3D API
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1. Host to Array copy
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2. Array to Array
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3. Array to Host
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In the end validates the results.
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This functionality is verified in 2 scenarios
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1. Basic scenario on same GPU device
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2. Device context change scenario where memory is allocated in 1 GPU
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and hipDrvMemcpy3D API is trigerred from another GPU
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*/
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template <typename T> void DrvMemcpy3D<T>::HostArray_DrvMemcpy3D(bool device_context_change) {
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HIP_CHECK(hipSetDevice(0));
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bool skip_test = false;
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int peerAccess = 0;
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AllocateMemory();
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if (device_context_change) {
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HIP_CHECK(hipDeviceCanAccessPeer(&peerAccess, 0, 1));
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if (!peerAccess) {
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WARN("skipped the testcase as no peer access");
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skip_test = true;
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} else {
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HIP_CHECK(hipSetDevice(1));
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}
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}
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if (!skip_test) {
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SetDefaultData();
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myparms.srcMemoryType = hipMemoryTypeHost;
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myparms.dstMemoryType = hipMemoryTypeArray;
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myparms.srcHost = hData;
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myparms.srcPitch = width * sizeof(T);
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myparms.srcHeight = height;
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myparms.dstArray = arr;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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// Array to Array
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SetDefaultData();
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myparms.srcMemoryType = hipMemoryTypeArray;
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myparms.dstMemoryType = hipMemoryTypeArray;
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myparms.srcArray = arr;
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myparms.dstArray = arr1;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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T* hOutputData = reinterpret_cast<T*>(malloc(size));
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memset(hOutputData, 0, size);
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SetDefaultData();
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// Device to host
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myparms.srcMemoryType = hipMemoryTypeArray;
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myparms.dstMemoryType = hipMemoryTypeHost;
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myparms.srcArray = arr1;
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myparms.dstHost = hOutputData;
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myparms.dstPitch = width * sizeof(T);
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myparms.dstHeight = height;
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HIP_CHECK(hipDrvMemcpy3D(&myparms));
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HipTest::checkArray(hData, hOutputData, width, height, depth);
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free(hOutputData);
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}
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DeAllocateMemory();
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}
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/* DeAllocating the memory */
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template <typename T> void DrvMemcpy3D<T>::DeAllocateMemory() {
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HIP_CHECK(hipArrayDestroy(arr));
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HIP_CHECK(hipArrayDestroy(arr1));
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free(hData);
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}
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/**
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* Test Description
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* ------------------------
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* - Verifying hipDrvMemcpy3D API Host to Array for different datatypes
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* Test source
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* ------------------------
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* - unit/memory/hipDrvMemcpy3D_old.cc
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* Test requirements
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* ------------------------
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* - HIP_VERSION >= 6.0
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*/
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TEMPLATE_TEST_CASE("Unit_hipDrvMemcpy3D_MultipleDataTypes", "", uint8_t, int, float) {
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CHECK_IMAGE_SUPPORT
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for (int i = 1; i < 25; i++) {
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if (std::is_same<TestType, float>::value) {
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DrvMemcpy3D<TestType> memcpy3d_float(i, i, i, HIP_AD_FORMAT_FLOAT);
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memcpy3d_float.HostArray_DrvMemcpy3D();
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} else if (std::is_same<TestType, uint8_t>::value) {
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DrvMemcpy3D<TestType> memcpy3d_intx(i, i, i, HIP_AD_FORMAT_UNSIGNED_INT8);
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memcpy3d_intx.HostArray_DrvMemcpy3D();
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} else if (std::is_same<TestType, int>::value) {
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DrvMemcpy3D<TestType> memcpy3d_inty(i, i, i, HIP_AD_FORMAT_SIGNED_INT32);
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memcpy3d_inty.HostArray_DrvMemcpy3D();
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}
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}
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}
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/**
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* Test Description
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* ------------------------
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* - This testcase verifies H2D copy of hipDrvMemcpy3D API
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* Test source
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* ------------------------
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* - unit/memory/hipDrvMemcpy3D_old.cc
|
|
* Test requirements
|
|
* ------------------------
|
|
* - HIP_VERSION >= 6.0
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|
*/
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|
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|
TEST_CASE("Unit_hipDrvMemcpy3D_HosttoDevice") {
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CHECK_IMAGE_SUPPORT
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DrvMemcpy3D<float> memcpy3d_D2H_float(10, 10, 1, HIP_AD_FORMAT_FLOAT);
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|
memcpy3d_D2H_float.HostDevice_DrvMemcpy3D();
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|
}
|
|
|
|
#if HT_NVIDIA
|
|
/**
|
|
* Test Description
|
|
* ------------------------
|
|
* - This testcase verifies negative scenarios of hipDrvMemcpy3D API
|
|
* Test source
|
|
* ------------------------
|
|
* - unit/memory/hipDrvMemcpy3D_old.cc
|
|
* Test requirements
|
|
* ------------------------
|
|
* - HIP_VERSION >= 6.0
|
|
*/
|
|
|
|
TEST_CASE("Unit_hipDrvMemcpy3D_Negative") {
|
|
DrvMemcpy3D<float> memcpy3d(10, 10, 1, HIP_AD_FORMAT_FLOAT);
|
|
memcpy3d.NegativeTests();
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Test Description
|
|
* ------------------------
|
|
* - This testcase verifies extent validation scenarios of hipDrvMemcpy3D API
|
|
* Test source
|
|
* ------------------------
|
|
* - unit/memory/hipDrvMemcpy3D_old.cc
|
|
* Test requirements
|
|
* ------------------------
|
|
* - HIP_VERSION >= 6.0
|
|
*/
|
|
|
|
TEST_CASE("Unit_hipDrvMemcpy3D_ExtentValidation") {
|
|
CHECK_IMAGE_SUPPORT
|
|
DrvMemcpy3D<float> memcpy3d(10, 10, 1, HIP_AD_FORMAT_FLOAT);
|
|
memcpy3d.Extent_Validation();
|
|
}
|
|
|
|
/**
|
|
* Test Description
|
|
* ------------------------
|
|
* - This testcase verifies H2D copy in device context
|
|
change scenario for hipDrvMemcpy3D API
|
|
* Test source
|
|
* ------------------------
|
|
* - unit/memory/hipDrvMemcpy3D_old.cc
|
|
* Test requirements
|
|
* ------------------------
|
|
* - HIP_VERSION >= 6.0
|
|
*/
|
|
|
|
TEST_CASE("Unit_hipDrvMemcpy3D_H2DDeviceContextChange", "[multigpu]") {
|
|
CHECK_IMAGE_SUPPORT
|
|
int numDevices = 0;
|
|
HIP_CHECK(hipGetDeviceCount(&numDevices));
|
|
if (numDevices > 1) {
|
|
DrvMemcpy3D<float> memcpy3d(10, 10, 1, HIP_AD_FORMAT_FLOAT);
|
|
memcpy3d.HostDevice_DrvMemcpy3D(true);
|
|
} else {
|
|
SUCCEED("skipped testcase as Device count is < 2");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Test Description
|
|
* ------------------------
|
|
* - This testcase verifies Host to Array copy in device context
|
|
change scenario for hipDrvMemcpy3D API
|
|
* Test source
|
|
* ------------------------
|
|
* - unit/memory/hipDrvMemcpy3D_old.cc
|
|
* Test requirements
|
|
* ------------------------
|
|
* - HIP_VERSION >= 6.0
|
|
*/
|
|
|
|
TEST_CASE("Unit_hipDrvMemcpy3D_Host2ArrayDeviceContextChange", "[multigpu]") {
|
|
CHECK_IMAGE_SUPPORT
|
|
int numDevices = 0;
|
|
HIP_CHECK(hipGetDeviceCount(&numDevices));
|
|
if (numDevices > 1) {
|
|
DrvMemcpy3D<float> memcpy3d(10, 10, 1, HIP_AD_FORMAT_FLOAT);
|
|
memcpy3d.HostArray_DrvMemcpy3D(true);
|
|
} else {
|
|
SUCCEED("skipped testcase as Device count is < 2");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Test Description
|
|
* ------------------------
|
|
* - This testcase performs multidevice size check on hipDrvMemcpy3D API
|
|
1. Verify with 128 for all height, width & depth value
|
|
2. Verify with 256 for height and 128 for width & depth value
|
|
3. Verify with 256 for width and 128 for height & depth value
|
|
4. Verify with 256 for depth and 128 for height & width value
|
|
* Test source
|
|
* ------------------------
|
|
* - unit/memory/hipDrvMemcpy3D_old.cc
|
|
* Test requirements
|
|
* ------------------------
|
|
* - HIP_VERSION >= 6.0
|
|
*/
|
|
|
|
TEST_CASE("Unit_hipDrvMemcpy3D_multiDevice_Basic_Size_Test", "[multigpu]") {
|
|
CHECK_IMAGE_SUPPORT
|
|
constexpr int size_128b = 128, size_256b = 256;
|
|
int numDevices = 0;
|
|
HIP_CHECK(hipGetDeviceCount(&numDevices));
|
|
|
|
for (int i = 0; i < numDevices; i++) {
|
|
HIP_CHECK(hipSetDevice(i));
|
|
|
|
SECTION("Verify with 128 for all height, width & depth value") {
|
|
DrvMemcpy3D<int> memcpy3d(size_128b, size_128b, size_128b, HIP_AD_FORMAT_SIGNED_INT32);
|
|
memcpy3d.HostArray_DrvMemcpy3D();
|
|
}
|
|
SECTION("Verify with 256 for height and 128 for width & depth value") {
|
|
DrvMemcpy3D<int> memcpy3d(size_256b, size_128b, size_128b, HIP_AD_FORMAT_SIGNED_INT32);
|
|
memcpy3d.HostArray_DrvMemcpy3D();
|
|
}
|
|
SECTION("Verify with 256 for width and 128 for height & depth value") {
|
|
DrvMemcpy3D<float> memcpy3d(size_128b, size_256b, size_128b, HIP_AD_FORMAT_FLOAT);
|
|
memcpy3d.HostArray_DrvMemcpy3D();
|
|
}
|
|
SECTION("Verify with 256 for depth and 128 for height & width value") {
|
|
DrvMemcpy3D<int> memcpy3d(size_128b, size_128b, size_256b, HIP_AD_FORMAT_SIGNED_INT32);
|
|
memcpy3d.HostArray_DrvMemcpy3D();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* End doxygen group MemoryTest.
|
|
* @}
|
|
*/
|