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[SYCL][CUDA] Set the device primary context for the cuMemGetInfo call #7906

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Merged
merged 2 commits into from
Jan 6, 2023
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[SYCL][CUDA] Set the device primary context for the cuMemGetInfo call #7906

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431b1b3
[SYCL][CUDA] Set the device primary context for the cuMemGetInfo call
Jan 3, 2023
5c8281f
Update sycl/plugins/cuda/pi_cuda.cpp
zjin-lcf Jan 4, 2023
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16 changes: 16 additions & 0 deletions sycl/plugins/cuda/pi_cuda.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1931,11 +1931,27 @@ pi_result cuda_piDeviceGetInfo(pi_device device, pi_device_info param_name,
}

case PI_EXT_INTEL_DEVICE_INFO_FREE_MEMORY: {
// Check the device of the currently set context uses the same device.
// CUDA_ERROR_INVALID_CONTEXT signifies the absence of an active context.
CUdevice current_ctx_device;
CUresult current_ctx_device_ret = cuCtxGetDevice(&current_ctx_device);
if (current_ctx_device_ret != CUDA_ERROR_INVALID_CONTEXT)
PI_CHECK_ERROR(current_ctx_device_ret);
bool need_primary_ctx = current_ctx_device_ret == CUDA_ERROR_INVALID_CONTEXT ||
current_ctx_device != device->get();
if (need_primary_ctx) {
// Use the primary context for the device if no context with the device is set.
CUcontext primary_context;
PI_CHECK_ERROR(cuDevicePrimaryCtxRetain(&primary_context, device->get()));
PI_CHECK_ERROR(cuCtxSetCurrent(primary_context));
}
size_t FreeMemory = 0;
size_t TotalMemory = 0;
sycl::detail::pi::assertion(cuMemGetInfo(&FreeMemory, &TotalMemory) ==
CUDA_SUCCESS,
"failed cuMemGetInfo() API.");
if (need_primary_ctx)
PI_CHECK_ERROR(cuDevicePrimaryCtxRelease(device->get()));
return getInfo(param_value_size, param_value, param_value_size_ret,
FreeMemory);
}
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