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3f91b4b43a
Move the common jaxlib/gpu_plugin_extension into jaxlib/gpu/ Cleanup only, no functional changes intended. PiperOrigin-RevId: 738183402
66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
/* Copyright 2023 The JAX Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#include <cstdint>
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#include <string>
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#include "nanobind/nanobind.h"
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#include "absl/status/status.h"
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#include "absl/strings/str_cat.h"
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#include "third_party/gpus/cuda/include/cuda.h"
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#include "jaxlib/gpu/gpu_plugin_extension.h"
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#include "xla/pjrt/status_casters.h"
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namespace nb = nanobind;
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namespace xla {
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namespace {
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static std::string ToString(CUresult result) {
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const char* error_name;
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if (cuGetErrorName(result, &error_name)) {
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return absl::StrCat("UNKNOWN ERROR (", static_cast<int>(result), ")");
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}
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const char* error_string;
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if (cuGetErrorString(result, &error_string)) {
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return error_name;
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}
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return absl::StrCat(error_name, ": ", error_string);
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}
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} // namespace
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NB_MODULE(cuda_plugin_extension, m) {
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BuildGpuPluginExtension(m);
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m.def(
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"get_device_ordinal",
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[](std::intptr_t data_value) {
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if (data_value == 0) {
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return 0;
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}
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int device_ordinal;
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void* data_ptr = reinterpret_cast<void*>(data_value);
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CUresult result =
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cuPointerGetAttribute(static_cast<void*>(&device_ordinal),
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CU_POINTER_ATTRIBUTE_DEVICE_ORDINAL,
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reinterpret_cast<CUdeviceptr>(data_ptr));
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if (result != CUDA_SUCCESS) {
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xla::ThrowIfError(absl::InvalidArgumentError(absl::StrCat(
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"Not able to get the device_ordinal: ", ToString(result))));
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}
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return device_ordinal;
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},
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nb::arg("data_value"));
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}
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} // namespace xla
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