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Add MG support to the C API #2110

Merged
merged 23 commits into from
Mar 16, 2022
Merged

Add MG support to the C API #2110

merged 23 commits into from
Mar 16, 2022

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ChuckHastings
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This PR adds multi-GPU support to the C API. The calls were already defined but if multi-GPU was defined they would return errors.

Closes #2091

@ChuckHastings ChuckHastings requested review from a team as code owners March 11, 2022 20:11
@ChuckHastings ChuckHastings self-assigned this Mar 11, 2022
@ChuckHastings ChuckHastings added 3 - Ready for Review improvement Improvement / enhancement to an existing function breaking Breaking change labels Mar 11, 2022
@ChuckHastings ChuckHastings added this to the 22.04 milestone Mar 11, 2022
@ChuckHastings ChuckHastings mentioned this pull request Mar 11, 2022
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@ChuckHastings ChuckHastings requested a review from a team as a code owner March 11, 2022 23:28
@ChuckHastings
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rerun tests

seunghwak
seunghwak reviewed Mar 14, 2022
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Except for few minor issues, looks good to me.

cpp/cmake/thirdparty/get_raft.cmake Show resolved Hide resolved
cpp/include/cugraph_c/graph.h Show resolved Hide resolved
cpp/include/cugraph_c/resource_handle.h Outdated Show resolved Hide resolved
cpp/include/cugraph_c/resource_handle.h Outdated Show resolved Hide resolved
cpp/tests/CMakeLists.txt Show resolved Hide resolved
cpp/tests/c_api/mg_create_graph_test.c Show resolved Hide resolved
cpp/tests/c_api/mg_pagerank_test.c

ret_code = cugraph_resource_handle_init_comms(handle, prows, &ret_error);
TEST_ASSERT(result, ret_code == CUGRAPH_SUCCESS, "handle create failed.");
TEST_ASSERT(result, ret_code == CUGRAPH_SUCCESS, cugraph_error_message(ret_error));
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Same here. We may consider adding a utility function to set prows from p in our C++ main codebase and call that function in MG C++ tests, MG C tests, and python tests.

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Ultimately we need a more complete design of this portion of the system. @rlratzel and I discussed this a bit. The problem is that in order to properly configure the raft handle in the C API we would need to replicate a bunch of code that RAFT has implemented in Python and have it callable from C.

Our short term solution is to allow the calling program to create and configure a raft handle and then pass it into the C API call. I think the right long term solution is to have RAFT migrate the dynamic configuration of the comms object (which requires doing a dlopen of the appropriate shared object library) from python into C++ so that we can call it from the C API.

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@seunghwak seunghwak Mar 15, 2022 •
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Umm... not sure how all these are related to computing p_rows from p, but I get this is not directly relevant to this PR. We should discuss how to properly compute p_rows (& p_cols) from p, but I agree that this should be a separate discussion.

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Fix for gmock CI build problem has been merged.

rerun tests

@ChuckHastings ChuckHastings requested a review from a team as a code owner March 15, 2022 19:14
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@@               Coverage Diff               @@
##             branch-22.04    #2110   +/-   ##
===============================================
  Coverage                ?   54.98%           
===============================================
  Files                   ?       12           
  Lines                   ?      662           
  Branches                ?        0           
===============================================
  Hits                    ?      364           
  Misses                  ?      298           
  Partials                ?        0

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@aschaffer aschaffer mentioned this pull request Mar 15, 2022
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ajschmidt8
ajschmidt8 approved these changes Mar 15, 2022
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Approving ops-codeowner file changes

@ChuckHastings
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rerun tests

@rlratzel
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Latest dask-cudf packages are available which should fix a CI failure.

rerun tests

@BradReesWork
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@gpucibot merge

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@gpucibot merge

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@gpucibot merge

@ajschmidt8 ajschmidt8 merged commit 08ab284 into rapidsai:branch-22.04 Mar 16, 2022
@ChuckHastings ChuckHastings deleted the fea_c_api_mg_implementation branch August 4, 2022 18:26
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@cjnolet cjnolet cjnolet left review comments

@rlratzel rlratzel rlratzel approved these changes

@ajschmidt8 ajschmidt8 ajschmidt8 approved these changes

@seunghwak seunghwak seunghwak approved these changes

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breaking Breaking change improvement Improvement / enhancement to an existing function
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[FEA] Add MG support to the C API
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@ChuckHastings @rlratzel @codecov-commenter @BradReesWork @cjnolet @ajschmidt8 @seunghwak