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Update to CCCL 2.7.0-rc2. #17233

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Update to CCCL 2.7.0-rc2. #17233

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3b1d74d
Two of the patches that we need for thrust cannot be applied CCCL 2.6…
miscco Aug 27, 2024
39e1655
Build with CCCL 2.7.0-rc2.
bdice Nov 1, 2024
f6d6441
Merge remote-tracking branch 'upstream/branch-24.12' into cccl-2.7.0-rc2
bdice Nov 13, 2024
e231fa3
Merge branch 'adopt_cccl_patches_2_6' into cccl-2.7.0-rc2
bdice Nov 13, 2024
732040f
Drop cccl_symbol_visibility patch.
bdice Nov 13, 2024
ce7e991
Remove patch for 64-bit dispatching.
bdice Nov 13, 2024
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3 changes: 3 additions & 0 deletions cpp/cmake/thirdparty/get_cccl.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,9 @@ function(find_and_configure_cccl)
)

# Find or install CCCL with our custom set of patches
# TODO: Does this work correctly? Is there a better way to set this? Should
# CCCL be setting THRUST_DISPATCH_TYPE with "FORCE"?
set(THRUST_DISPATCH_TYPE "Force32bit" STRING "Thrust offset type dispatch")
Comment on lines +37 to +39
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@robertmaynard I'd appreciate your eyes on this. There was an upstream change in CCCL in NVIDIA/cccl#2310 that made it possible to force CCCL to only compile kernels with 32-bit offsets when THRUST_DISPATCH_TYPE is set to "Force32bit". However, I do not know how to forward this argument through rapids_cpm_cccl. If I were using rapids_cpm_find I think I could use OPTIONS. What's the best approach?

Secondly, I am wondering if CCCL should be using FORCE here: https://github.com/NVIDIA/cccl/blob/264b587d0621ee2c6bec27aa015078056cb5f021/thrust/CMakeLists.txt#L38
Does that override my ability to set the variable ahead of time, or not since it's marked as CACHE?

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Yes the FORCE means that we can't overwrite as each time CMake is invoked the value will be reset to Force32bit.

As for passing this down from rapids_cpm_cccl you would do rapids_cpm_cccl(CPM_ARGS OPTIONS "THRUST_DISPATCH_TYPE Force32bit")

rapids_cpm_cccl(BUILD_EXPORT_SET cudf-exports INSTALL_EXPORT_SET cudf-exports)

endfunction()
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10 changes: 0 additions & 10 deletions cpp/cmake/thirdparty/patches/cccl_override.json
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Expand Up @@ -3,16 +3,6 @@
"packages" : {
"CCCL" : {
"patches" : [
{
"file" : "${current_json_dir}/cccl_symbol_visibility.diff",
"issue" : "Correct symbol visibility issues in libcudacxx [https://github.com/NVIDIA/cccl/pull/1832/]",
"fixed_in" : "2.6"
},
{
"file" : "${current_json_dir}/thrust_disable_64bit_dispatching.diff",
"issue" : "Remove 64bit dispatching as not needed by libcudf and results in compiling twice as many kernels [https://github.com/rapidsai/cudf/pull/11437]",
"fixed_in" : ""
},
{
"file" : "${current_json_dir}/thrust_faster_sort_compile_times.diff",
"issue" : "Improve Thrust sort compile times by not unrolling loops for inlined comparators [https://github.com/rapidsai/cudf/pull/10577]",
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27 changes: 0 additions & 27 deletions cpp/cmake/thirdparty/patches/cccl_symbol_visibility.diff
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This file was deleted.

25 changes: 0 additions & 25 deletions cpp/cmake/thirdparty/patches/thrust_disable_64bit_dispatching.diff
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This file was deleted.

12 changes: 6 additions & 6 deletions cpp/cmake/thirdparty/patches/thrust_faster_sort_compile_times.diff
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Original file line number Diff line number Diff line change
@@ -1,20 +1,20 @@
diff --git a/cub/cub/block/block_merge_sort.cuh b/cub/cub/block/block_merge_sort.cuh
index eb76ebb0b..c6c529a50 100644
index 29510db5e..cf57e5786 100644
--- a/cub/cub/block/block_merge_sort.cuh
+++ b/cub/cub/block/block_merge_sort.cuh
@@ -95,7 +95,7 @@ _CCCL_DEVICE _CCCL_FORCEINLINE void SerialMerge(
KeyT key1 = keys_shared[keys1_beg];
KeyT key2 = keys_shared[keys2_beg];

-#pragma unroll
+#pragma unroll 1
for (int item = 0; item < ITEMS_PER_THREAD; ++item)
{
bool p = (keys2_beg < keys2_end) && ((keys1_beg >= keys1_end) || compare_op(key2, key1));
@@ -376,7 +376,7 @@ public:
const bool p = (keys2_beg < keys2_end) && ((keys1_beg >= keys1_end) || compare_op(key2, key1));
@@ -374,7 +374,7 @@ public:
//
KeyT max_key = oob_default;

-#pragma unroll
+#pragma unroll 1
for (int item = 1; item < ITEMS_PER_THREAD; ++item)
Expand All @@ -27,7 +27,7 @@ index 7d9e8622f..da5627306 100644
@@ -87,10 +87,10 @@ StableOddEvenSort(KeyT (&keys)[ITEMS_PER_THREAD], ValueT (&items)[ITEMS_PER_THRE
{
constexpr bool KEYS_ONLY = ::cuda::std::is_same<ValueT, NullType>::value;

-#pragma unroll
+#pragma unroll 1
for (int i = 0; i < ITEMS_PER_THREAD; ++i)
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4 changes: 4 additions & 0 deletions rapids_config.cmake
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Expand Up @@ -11,6 +11,10 @@
# or implied. See the License for the specific language governing permissions and limitations under
# the License.
# =============================================================================

set(rapids-cmake-repo bdice/rapids-cmake)
set(rapids-cmake-branch cccl-2.7.0-rc2)

file(READ "${CMAKE_CURRENT_LIST_DIR}/VERSION" _rapids_version)
if(_rapids_version MATCHES [[^([0-9][0-9])\.([0-9][0-9])\.([0-9][0-9])]])
set(RAPIDS_VERSION_MAJOR "${CMAKE_MATCH_1}")
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