Skip to content
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

Jump to bottom

Adding Radeon support by controlling wave size #1729

Open
wants to merge 3 commits into
base: develop
Choose a base branch
from
Open

Adding Radeon support by controlling wave size #1729

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
bd9f2fb
Various tweaks to enable Wave32 for Radeon cards with HIP.
seanofthemillers Aug 16, 2024
f352a5f
Removing dynamic stack allocation fix
seanofthemillers Nov 18, 2024
d0a65e7
Apply suggestions from code review
MrBurmark Nov 25, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions CMakeLists.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -171,6 +171,7 @@ endif()

if(RAJA_ENABLE_HIP)
message(STATUS "HIP version: ${hip_VERSION}")
set(RAJA_HIP_WAVESIZE "64" CACHE STRING "Set the wave size for GPU architecture. E.g. MI200/MI300 this is 64.")
if("${hip_VERSION}" VERSION_LESS "3.5")
message(FATAL_ERROR "Trying to use HIP/ROCm version ${hip_VERSION}. RAJA requires HIP/ROCm version 3.5 or newer. ")
endif()
Expand Down
2 changes: 2 additions & 0 deletions include/RAJA/config.hpp.in
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -182,6 +182,8 @@ static_assert(RAJA_HAS_SOME_CXX14,
#cmakedefine RAJA_ENABLE_NV_TOOLS_EXT
#cmakedefine RAJA_ENABLE_ROCTX

#cmakedefine RAJA_HIP_WAVESIZE @RAJA_HIP_WAVESIZE@

/*!
******************************************************************************
*
Expand Down
5 changes: 3 additions & 2 deletions include/RAJA/policy/hip/policy.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -324,8 +324,9 @@ struct DeviceConstants
// values for HIP warp size and max block size.
//
#if defined(__HIP_PLATFORM_AMD__)
constexpr DeviceConstants device_constants(64, 1024, 64); // MI300A
// constexpr DeviceConstants device_constants(64, 1024, 128); // MI250X
constexpr DeviceConstants device_constants(RAJA_HIP_WAVESIZE, 1024, 64); // MI300A
// constexpr DeviceConstants device_constants(RAJA_HIP_WAVESIZE, 1024, 128); // MI250X

#elif defined(__HIP_PLATFORM_NVIDIA__)
constexpr DeviceConstants device_constants(32, 1024, 32); // V100
#endif
Expand Down
9 changes: 5 additions & 4 deletions include/RAJA/policy/tensor/arch/hip/hip_wave.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@ namespace expt

public:

static constexpr int s_num_elem = 64;
static constexpr int s_num_elem = policy::hip::device_constants.WARP_SIZE;

/*!
* @brief Default constructor, zeros register contents
Expand Down Expand Up @@ -780,8 +780,8 @@ namespace expt

// Third: mask off everything but output_segment
// this is because all output segments are valid at this point
// (5-segbits), the 5 is since the warp-width is 32 == 1<<5
int our_output_segment = get_lane()>>(6-segbits);
constexpr int log2_warp_size = RAJA::log2(RAJA::policy::hip::device_constants.WARP_SIZE);
MrBurmark marked this conversation as resolved.
Show resolved Hide resolved
int our_output_segment = get_lane()>>(log2_warp_size-segbits);
bool in_output_segment = our_output_segment == output_segment;
if(!in_output_segment){
result.get_raw_value() = 0;
Expand Down Expand Up @@ -828,8 +828,9 @@ namespace expt

// First: tree reduce values within each segment
element_type x = m_value;
constexpr int log2_warp_size = RAJA::log2(RAJA::policy::hip::device_constants.WARP_SIZE);
MrBurmark marked this conversation as resolved.
Show resolved Hide resolved
RAJA_UNROLL
for(int i = 0;i < 6-segbits; ++ i){
for(int i = 0;i < log2_warp_size-segbits; ++ i){

// tree shuffle
int delta = s_num_elem >> (i+1);
Expand Down
3 changes: 2 additions & 1 deletion include/RAJA/policy/tensor/arch/hip/traits.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,8 @@ namespace expt {
struct RegisterTraits<RAJA::expt::hip_wave_register, T>{
using element_type = T;
using register_policy = RAJA::expt::hip_wave_register;
static constexpr camp::idx_t s_num_elem = 64;
static constexpr camp::idx_t s_num_elem = policy::hip::device_constants.WARP_SIZE;

static constexpr camp::idx_t s_num_bits = sizeof(T) * s_num_elem;
using int_element_type = int32_t;
};
Expand Down
4 changes: 3 additions & 1 deletion test/include/RAJA_test-tensor.hpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,9 @@ struct TensorTestHelper<RAJA::expt::hip_wave_register>
void exec(BODY const &body){
hipDeviceSynchronize();

RAJA::forall<RAJA::hip_exec<64>>(RAJA::RangeSegment(0,64),
constexpr int warp_size = RAJA::policy::hip::device_constants.WARP_SIZE;
MrBurmark marked this conversation as resolved.
Show resolved Hide resolved

RAJA::forall<RAJA::hip_exec<warp_size>>(RAJA::RangeSegment(0,warp_size),
[=] RAJA_HOST_DEVICE (int ){
body();
});
Expand Down
Loading