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Delegate basic arithmetic and logical binops to libgdf. #14

Merged
merged 5 commits into from
Jun 2, 2017
Merged

Delegate basic arithmetic and logical binops to libgdf. #14

merged 5 commits into from
Jun 2, 2017

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sklam
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@sklam sklam commented Jun 1, 2017

Task #4

Delegate basic arithmetic and logical binops to libgdf.

Only operands of the same dtype is supported. No implicit casting is provided yet.

@sklam sklam requested a review from seibert June 1, 2017 14:20
sklam added 2 commits June 1, 2017 16:18
@sklam
Update env spec.
be3368b 
Only specify essential/direct dependencies.
@sklam
Add rounding unary operation: ceil and floor
3593624
@seibert seibert merged commit 415972c into rapidsai:master Jun 2, 2017
@seibert seibert mentioned this pull request Jun 2, 2017
Closed
@sklam sklam deleted the libgdf branch June 2, 2017 16:38
sklam pushed a commit to sklam/pygdf that referenced this pull request Jun 11, 2018
@seibert
Merge pull request rapidsai#14 from sklam/condarecipe
bb9f7f2 
Add conda recipes
rapids-bot bot pushed a commit that referenced this pull request Jun 9, 2023
@ttnghia
Add stacktrace into cudf exception types (#13298)
69206d1 
This implements stacktrace and adds a stacktrace string into any exception thrown by cudf. By doing so, the exception carries information about where it originated, allowing the downstream application to trace back with much less effort.

Closes #12422.

### Example:
```
#0: cudf/cpp/build/libcudf.so : std::unique_ptr<cudf::column, std::default_delete<cudf::column> > cudf::detail::sorted_order<false>(cudf::table_view, std::vector<cudf::order, std::allocator<cudf::order> > const&, std::vector<cudf::null_order, std::allocator<cudf::null_order> > const&, rmm::cuda_stream_view, rmm::mr::device_memory_resource*)+0x446
#1: cudf/cpp/build/libcudf.so : cudf::detail::sorted_order(cudf::table_view const&, std::vector<cudf::order, std::allocator<cudf::order> > const&, std::vector<cudf::null_order, std::allocator<cudf::null_order> > const&, rmm::cuda_stream_view, rmm::mr::device_memory_resource*)+0x113
#2: cudf/cpp/build/libcudf.so : std::unique_ptr<cudf::column, std::default_delete<cudf::column> > cudf::detail::segmented_sorted_order_common<(cudf::detail::sort_method)1>(cudf::table_view const&, cudf::column_view const&, std::vector<cudf::order, std::allocator<cudf::order> > const&, std::vector<cudf::null_order, std::allocator<cudf::null_order> > const&, rmm::cuda_stream_view, rmm::mr::device_memory_resource*)+0x66e
#3: cudf/cpp/build/libcudf.so : cudf::detail::segmented_sort_by_key(cudf::table_view const&, cudf::table_view const&, cudf::column_view const&, std::vector<cudf::order, std::allocator<cudf::order> > const&, std::vector<cudf::null_order, std::allocator<cudf::null_order> > const&, rmm::cuda_stream_view, rmm::mr::device_memory_resource*)+0x88
#4: cudf/cpp/build/libcudf.so : cudf::segmented_sort_by_key(cudf::table_view const&, cudf::table_view const&, cudf::column_view const&, std::vector<cudf::order, std::allocator<cudf::order> > const&, std::vector<cudf::null_order, std::allocator<cudf::null_order> > const&, rmm::mr::device_memory_resource*)+0xb9
#5: cudf/cpp/build/gtests/SORT_TEST : ()+0xe3027
#6: cudf/cpp/build/lib/libgtest.so.1.13.0 : void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)+0x8f
#7: cudf/cpp/build/lib/libgtest.so.1.13.0 : testing::Test::Run()+0xd6
#8: cudf/cpp/build/lib/libgtest.so.1.13.0 : testing::TestInfo::Run()+0x195
#9: cudf/cpp/build/lib/libgtest.so.1.13.0 : testing::TestSuite::Run()+0x109
#10: cudf/cpp/build/lib/libgtest.so.1.13.0 : testing::internal::UnitTestImpl::RunAllTests()+0x44f
#11: cudf/cpp/build/lib/libgtest.so.1.13.0 : bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)+0x87
#12: cudf/cpp/build/lib/libgtest.so.1.13.0 : testing::UnitTest::Run()+0x95
#13: cudf/cpp/build/gtests/SORT_TEST : ()+0xdb08c
#14: /lib/x86_64-linux-gnu/libc.so.6 : ()+0x29d90
#15: /lib/x86_64-linux-gnu/libc.so.6 : __libc_start_main()+0x80
#16: cudf/cpp/build/gtests/SORT_TEST : ()+0xdf3d5
```

### Usage

In order to retrieve a stacktrace with fully human-readable symbols, some compiling options must be adjusted. To make such adjustment convenient and effortless, a new cmake option (`CUDF_BUILD_STACKTRACE_DEBUG`) has been added. Just set this option to `ON` before building cudf and it will be ready to use.

For downstream applications, whenever a cudf-type exception is thrown, it can retrieve the stored stacktrace and do whatever it wants with it. For example:
```
try {
  // cudf API calls
} catch (cudf::logic_error const& e) {
  std::cout << e.what() << std::endl;
  std::cout << e.stacktrace() << std::endl;
  throw e;
} 
// similar with catching other exception types
```

### Follow-up work

The next step would be patching `rmm` to attach stacktrace into `rmm::` exceptions. Doing so will allow debugging various memory exceptions thrown from libcudf using their stacktrace.


### Note:
 * This feature doesn't require libcudf to be built in Debug mode.
 * The flag `CUDF_BUILD_STACKTRACE_DEBUG` should not be turned on in production as it may affect code optimization. Instead, libcudf compiled with that flag turned on should be used only when needed, when debugging cudf throwing exceptions.
 * This flag removes the current optimization flag from compiling (such as `-O2` or `-O3`, if in Release mode) and replaces by `-Og` (optimize for debugging).
 * If this option is not set to `ON`, the stacktrace will not be available. This is to avoid expensive stracktrace retrieval if the throwing exception is expected.

Authors:
  - Nghia Truong (https://github.com/ttnghia)

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)
  - Robert Maynard (https://github.com/robertmaynard)
  - Vyas Ramasubramani (https://github.com/vyasr)
  - Jason Lowe (https://github.com/jlowe)

URL: #13298
raydouglass pushed a commit that referenced this pull request Nov 7, 2023
@galipremsagar
Match datetime to string conversions with pandas (#14)
24a8365 
Fixes: #14152

This PR adds additional sub-second data introspection while converting a datetime64 to a string column to match pandas. Because it's not free, this is being added only in pandas compatibility mode.
@lithomas1 lithomas1 mentioned this pull request Jul 1, 2024
Closed
liurenjie1024 pushed a commit to liurenjie1024/cudf that referenced this pull request Sep 18, 2024
@wjxiz1992
Merge pull request rapidsai#14 from res-life/revert-11-multi-string-c…
ce6ad27 
…ontains-for-merge-2

Revert "Fix comments; warp optimization"
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