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Fix memory error due to lambda return type deduction limitation #9778

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merged 5 commits into from
Dec 1, 2021
Merged

Fix memory error due to lambda return type deduction limitation #9778

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60a88fb
add __host__ for nvcc return type deduction
karthikeyann Nov 25, 2021
d88fb12
replace host device lambda with device functor
karthikeyann Nov 30, 2021
2ff54e3
[skip-ci] add comment
karthikeyann Nov 30, 2021
0682a1f
add unit test for crash scenario
karthikeyann Dec 1, 2021
eb166db
Update cpp/src/sort/rank.cu
karthikeyann Dec 1, 2021
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11 changes: 7 additions & 4 deletions cpp/src/sort/rank.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -194,6 +194,12 @@ void rank_max(cudf::device_span<size_type const> group_keys,
stream);
}

// Returns index, count
template <typename T>
struct index_counter {
__device__ T operator()(size_type i) { return T{i, 1}; }
};

void rank_average(cudf::device_span<size_type const> group_keys,
column_view sorted_order_view,
mutable_column_view rank_mutable_view,
Expand All @@ -208,10 +214,7 @@ void rank_average(cudf::device_span<size_type const> group_keys,
using MinCount = thrust::pair<size_type, size_type>;
tie_break_ranks_transform<MinCount>(
group_keys,
cudf::detail::make_counting_transform_iterator(1,
[] __device__(auto i) {
return MinCount{i, 1};
}),
cudf::detail::make_counting_transform_iterator(1, index_counter<MinCount>{}),
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sorted_order_view,
rank_mutable_view.begin<double>(),
[] __device__(auto rank_count1, auto rank_count2) {
Expand Down