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[libcu++] Check if managed pools are accessible in is_pointer_accessible test #7096

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Merged
davebayer merged 3 commits into from
Jan 8, 2026
Merged

[libcu++] Check if managed pools are accessible in is_pointer_accessible test #7096

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5d41894
Check if managed pools are accessible in is_pointer_accessible test
pciolkosz Jan 7, 2026
6f32dcb
Apply suggestion from @davebayer
davebayer Jan 7, 2026
bf6cf9a
Merge branch 'main' into check_device_attributes_before_using_managed…
davebayer Jan 7, 2026
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2 changes: 1 addition & 1 deletion libcudacxx/include/cuda/__driver/driver_api.h
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Expand Up @@ -226,7 +226,7 @@ __get_driver_entry_point(const char* __name, [[maybe_unused]] int __major = 12,
return __result;
}

[[nodiscard]] _CCCL_HOST_API inline ::CUdevice __deviceGetAttribute(::CUdevice_attribute __attr, ::CUdevice __device)
[[nodiscard]] _CCCL_HOST_API inline int __deviceGetAttribute(::CUdevice_attribute __attr, ::CUdevice __device)
{
static auto __driver_fn = _CCCLRT_GET_DRIVER_FUNCTION(cuDeviceGetAttribute);
int __result;
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17 changes: 12 additions & 5 deletions libcudacxx/test/libcudacxx/cuda/memory/is_pointer_accessible.pass.cpp
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Expand Up @@ -129,15 +129,22 @@ void test_memory_pool_impl(

bool test_memory_pool()
{
test_memory_pool_impl(cudaMemAllocationTypePinned, cudaMemLocationTypeDevice, false, true, false);
if (cuda::__driver::__deviceGetAttribute(::CU_DEVICE_ATTRIBUTE_MEMORY_POOLS_SUPPORTED, 0))
{
test_memory_pool_impl(cudaMemAllocationTypePinned, cudaMemLocationTypeDevice, false, true, false);

#if _CCCL_CTK_AT_LEAST(12, 2)
test_memory_pool_impl(cudaMemAllocationTypePinned, cudaMemLocationTypeHost, true, false, false);
test_memory_pool_impl(cudaMemAllocationTypePinned, cudaMemLocationTypeHost, true, false, false);
#endif // _CCCL_CTK_AT_LEAST(12, 2)
#if _CCCL_CTK_AT_LEAST(13, 0)
// TODO(fbusato): check if this can be improved in future releases
test_memory_pool_impl(cudaMemAllocationTypeManaged, cudaMemLocationTypeHost, true, false, true);
test_memory_pool_impl(cudaMemAllocationTypeManaged, cudaMemLocationTypeDevice, false, true, true);
// TODO(fbusato): check if this can be improved in future releases
if (cuda::__driver::__deviceGetAttribute(::CU_DEVICE_ATTRIBUTE_CONCURRENT_MANAGED_ACCESS, 0))
{
// TODO(fbusato): check if this can be improved in future releases
test_memory_pool_impl(cudaMemAllocationTypeManaged, cudaMemLocationTypeHost, true, false, true);
test_memory_pool_impl(cudaMemAllocationTypeManaged, cudaMemLocationTypeDevice, false, true, true);
}
}
#endif // _CCCL_CTK_AT_LEAST(13, 0)
return true;
}
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