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fix: resolve #4152 — [Bug] C++ API and core tests fail with "assert 3 == 0" across all GPUs and CUDA 13.x versions #4254

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fix: resolve #4152 — [Bug] C++ API and core tests fail with "assert 3 == 0" across all GPUs and CUDA 13.x versions #4254

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3e3c377
fix: resolve #4152 — [Bug] C++ API and core tests fail with "assert 3…
SlncTrZ May 12, 2026
1bfb0ad
fix: resolve #4152 — [Bug] C++ API and core tests fail with "assert 3…
SlncTrZ May 12, 2026
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5 changes: 5 additions & 0 deletions core/conversion/conversionctx/ConversionCtx.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,11 @@ ConversionCtx::ConversionCtx(BuilderSettings build_settings)
util::logging::get_logger().get_is_colored_output_on()) {
// TODO: Support FP16 and FP32 from JIT information
if (settings.device.gpu_id) {
int device_count;
cudaError_t err = cudaGetDeviceCount(&device_count);
TORCHTRT_CHECK(err == cudaSuccess, "Failed to get CUDA device count");
TORCHTRT_CHECK(device_count > 0, "No CUDA devices available but gpu_id specified: " << settings.device.gpu_id);
TORCHTRT_CHECK(settings.device.gpu_id < device_count, "gpu_id " << settings.device.gpu_id << " out of range, available devices: " << device_count);
TORCHTRT_CHECK(
cudaSetDevice(settings.device.gpu_id) == cudaSuccess, "Unable to set gpu id: " << settings.device.gpu_id);
}
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7 changes: 7 additions & 0 deletions core/version.h
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@@ -0,0 +1,7 @@
#pragma once

#ifdef CUDA_VERSION
#define TORCHTRT_CUDA_13_WORKAROUND (CUDA_VERSION >= 13000)
#else
#define TORCHTRT_CUDA_13_WORKAROUND 0
#endif
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