8000 Support CPU only memcpy by kloudkl · Pull Request #633 · BVLC/caffe · GitHub
[go: up one dir, main page]
More Web Proxy on the site http://driver.im/
Skip to content

Support CPU only memcpy #633

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 5 commits into from
Jul 10, 2014
Merged

Support CPU only memcpy #633

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
3bd49ba
Avoid using cudaMemcpy for memcpy when there is no GPU and CUDA driver
kloudkl Jul 7, 2014
4d16ed5
Check the GPU mode to decide which memcpy to use
kloudkl Jul 9, 2014
00433d8
Switch to GPU mode when pointer is move to or from GPU in SyncedMemory
kloudkl Jul 9, 2014
ac0dd39
Implement @Yangqing's solution to copy memory in the SyncedMemory
kloudkl Jul 9, 2014
904c2ce
Replace cudaMemcpy with caffe_gpu_memcpy in SyncedMemory per @longjon
kloudkl Jul 9, 2014
File filter

Filter by extension

Filter by extension
Conversat 8000 ions
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion include/caffe/util/math_functions.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ void caffe_gpu_axpby(const int N, const Dtype alpha, const Dtype* X,
template <typename Dtype>
void caffe_copy(const int N, const Dtype *X, Dtype *Y);

void caffe_memcpy(const size_t N, const void *X, void *Y);
void caffe_gpu_memcpy(const size_t N, const void *X, void *Y);

template <typename Dtype>
void caffe_set(const int N, const Dtype alpha, Dtype *X);
Expand Down
4 changes: 2 additions & 2 deletions src/caffe/syncedmem.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@ inline void SyncedMemory::to_cpu() {
CaffeMallocHost(&cpu_ptr_, size_);
own_cpu_data_ = true;
}
caffe_memcpy(size_, gpu_ptr_, cpu_ptr_);
caffe_gpu_memcpy(size_, gpu_ptr_, cpu_ptr_);
head_ = SYNCED;
break;
case HEAD_AT_CPU:
Expand All @@ -53,7 +53,7 @@ inline void SyncedMemory::to_gpu() {
if (gpu_ptr_ == NULL) {
CUDA_CHECK(cudaMalloc(&gpu_ptr_, size_));
}
caffe_memcpy(size_, cpu_ptr_, gpu_ptr_);
caffe_gpu_memcpy(size_, cpu_ptr_, gpu_ptr_);
head_ = SYNCED;
break;
case HEAD_AT_GPU:
Expand Down
2 changes: 2 additions & 0 deletions src/caffe/test/test_math_functions.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -209,6 +209,7 @@ TYPED_TEST(MathFunctionsTest, TestCopyCPU) {
const int n = this->blob_bottom_->count();
const TypeParam* bottom_data = this->blob_bottom_->cpu_data();
TypeParam* top_data = this->blob_top_->mutable_cpu_data();
Caffe::set_mode(Caffe::CPU);
caffe_copy(n, bottom_data, top_data);
for (int i = 0; i < n; ++i) {
EXPECT_EQ(bottom_data[i], top_data[i]);
Expand All @@ -219,6 +220,7 @@ TYPED_TEST(MathFunctionsTest, TestCopyGPU) {
const int n = this->blob_bottom_->count();
const TypeParam* bottom_data = this->blob_bottom_->gpu_data();
TypeParam* top_data = this->blob_top_->mutable_gpu_data();
Caffe::set_mode(Caffe::GPU);
caffe_copy(n, bottom_data, top_data);
bottom_data = this->blob_bottom_->cpu_data();
top_data = this->blob_top_->mutable_cpu_data();
Expand Down
4 changes: 2 additions & 2 deletions src/caffe/test/test_syncedmem.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@ TEST_F(SyncedMemoryTest, TestGPURead) {
EXPECT_EQ(mem.head(), SyncedMemory::SYNCED);
// check if values are the same
char* recovered_value = new char[10];
caffe_memcpy(10, gpu_data, recovered_value);
caffe_gpu_memcpy(10, gpu_data, recovered_value);
for (int i = 0; i < mem.size(); ++i) {
EXPECT_EQ((reinterpret_cast<char*>(recovered_value))[i], 1);
}
Expand All @@ -72,7 +72,7 @@ TEST_F(SyncedMemoryTest, TestGPURead) {
gpu_data = mem.gpu_data();
EXPECT_EQ(mem.head(), SyncedMemory::SYNCED);
// check if values are the same
caffe_memcpy(10, gpu_data, recovered_value);
caffe_gpu_memcpy(10, gpu_data, recovered_value);
for (int i = 0; i < mem.size(); ++i) {
EXPECT_EQ((reinterpret_cast<char*>(recovered_value))[i], 2);
}
Expand Down
8 changes: 6 additions & 2 deletions src/caffe/util/math_functions.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -152,7 +152,11 @@ void caffe_add_scalar(const int N, const double alpha, double* Y) {
template <typename Dtype>
void caffe_copy(const int N, const Dtype* X, Dtype* Y) {
if (X != Y) {
CUDA_CHECK(cudaMemcpy(Y, X, sizeof(Dtype) * N, cudaMemcpyDefault));
if (Caffe::mode() == Caffe::GPU) {
CUDA_CHECK(cudaMemcpy(Y, X, sizeof(Dtype) * N, cudaMemcpyDefault));
} else {
memcpy(Y, X, sizeof(Dtype) * N);
}
}
}

Expand All @@ -162,7 +166,7 @@ template void caffe_copy<unsigned int>(const int N, const unsigned int* X,
template void caffe_copy<float>(const int N, const float* X, float* Y);
template void caffe_copy<double>(const int N, const double* X, double* Y);

void caffe_memcpy(const size_t N, const void* X, void* Y) {
void caffe_gpu_memcpy(const size_t N, const void* X, void* Y) {
if (X != Y) {
CUDA_CHECK(cudaMemcpy(Y, X, N, cudaMemcpyDefault));
}
Expand Down
0