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feat: API to get device properties for cuda #1761

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Merged
merged 2 commits into from
Oct 17, 2025
Merged

feat: API to get device properties for cuda #1761

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2292ba9
feat: API to get device properties for cuda
avik-pal Oct 16, 2025
7b881aa
fix: incorrect error msg
avik-pal Oct 16, 2025
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59 changes: 59 additions & 0 deletions deps/ReactantExtra/API.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -730,9 +730,29 @@ std::vector<int64_t> row_major(int64_t dim) {
}
static void noop() {}

struct DeviceProperties {
size_t totalGlobalMem;
size_t sharedMemPerBlock;
int regsPerBlock;
int warpSize;
int maxThreadsPerBlock;
int maxThreadsDim[3];
int maxGridSize[3];
int clockRate;
size_t totalConstMem;
int major;
int minor;
int multiProcessorCount;
int canMapHostMemory;
int computeMode;
int l2CacheSize;
int maxThreadsPerMultiProcessor;
};

#ifdef REACTANT_CUDA

#include "third_party/gpus/cuda/include/cuda.h"
#include "third_party/gpus/cuda/include/cuda_runtime.h"

REACTANT_ABI int32_t ReactantCudaDriverGetVersion() {
int32_t data;
Expand Down Expand Up @@ -769,6 +789,33 @@ REACTANT_ABI int32_t ReactantCudaDeviceGetWarpSizeInThreads() {
return warpSize;
}

REACTANT_ABI void ReactantCudaDeviceGetProperties(DeviceProperties *jlprops,
int32_t device_id) {
cudaDeviceProp props;
ReactantHandleCuResult(cudaGetDeviceProperties(&props, device_id));

jlprops->totalGlobalMem = props.totalGlobalMem;
jlprops->sharedMemPerBlock = props.sharedMemPerBlock;
jlprops->regsPerBlock = props.regsPerBlock;
jlprops->warpSize = props.warpSize;
jlprops->maxThreadsPerBlock = props.maxThreadsPerBlock;
jlprops->maxThreadsDim[0] = props.maxThreadsDim[0];
jlprops->maxThreadsDim[1] = props.maxThreadsDim[1];
jlprops->maxThreadsDim[2] = props.maxThreadsDim[2];
jlprops->maxGridSize[0] = props.maxGridSize[0];
jlprops->maxGridSize[1] = props.maxGridSize[1];
jlprops->maxGridSize[2] = props.maxGridSize[2];
jlprops->clockRate = props.clockRate;
jlprops->totalConstMem = props.totalConstMem;
jlprops->major = props.major;
jlprops->minor = props.minor;
jlprops->multiProcessorCount = props.multiProcessorCount;
jlprops->canMapHostMemory = props.canMapHostMemory;
jlprops->computeMode = props.computeMode;
jlprops->l2CacheSize = props.l2CacheSize;
jlprops->maxThreadsPerMultiProcessor = props.maxThreadsPerMultiProcessor;
}

#else

REACTANT_ABI int32_t ReactantCudaDriverGetVersion() { return 0; }
Expand All @@ -781,6 +828,9 @@ REACTANT_ABI int32_t ReactantCudaDeviceGetComputeCapalilityMinor() { return 0; }

REACTANT_ABI int32_t ReactantCudaDeviceGetWarpSizeInThreads() { return 0; }

REACTANT_ABI void ReactantCudaDeviceGetProperties(DeviceProperties *jlprops,
int32_t device_id) {}

#endif

REACTANT_ABI void *UnsafeBufferPointer(PjRtBuffer *buffer) {
Expand Down Expand Up @@ -1955,6 +2005,15 @@ REACTANT_ABI bool ifrt_DeviceIsAddressable(ifrt::Device *device) {
return device->IsAddressable();
}

REACTANT_ABI int64_t ifrt_DeviceGetLocalHardwareId(ifrt::Device *device) {
if (!llvm::isa<ifrt::PjRtDevice>(device)) {
ReactantThrowError(
"ifrt_DeviceGetLocalHardwareId: only supported for ifrt-pjrt.");
}
auto ifrt_pjrt_device = llvm::dyn_cast<ifrt::PjRtDevice>(device);
return ifrt_pjrt_device->pjrt_device()->local_hardware_id().value();
}

static xla::ifrt::RCReferenceWrapper<ifrt::DeviceList>
ifrt_CreateDeviceListFromDevices(ifrt::Client *client,
ifrt::Device **device_list,
Expand Down
1 change: 1 addition & 0 deletions deps/ReactantExtra/BUILD
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Expand Up @@ -983,6 +983,7 @@ cc_library(
"-Wl,-exported_symbol,_ReactantCudaDeviceGetComputeCapalilityMajor",
"-Wl,-exported_symbol,_ReactantCudaDeviceGetComputeCapalilityMinor",
"-Wl,-exported_symbol,_ReactantCudaDeviceGetWarpSizeInThreads",
"-Wl,-exported_symbol,_ReactantCudaDeviceGetProperties",
"-Wl,-exported_symbol,_PjRtDeviceGetLocalDeviceId",
"-Wl,-exported_symbol,_PjRtDeviceGetGlobalDeviceId",
"-Wl,-exported_symbol,_PjRtDeviceGetLocalHardwareId",
Expand Down
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