rok commented on code in PR #44470:
URL: https://github.com/apache/arrow/pull/44470#discussion_r2081256616
##########
cpp/src/arrow/dataset/file_test.cc:
##########
@@ -353,6 +356,89 @@ TEST_F(TestFileSystemDataset, WriteProjected) {
}
}
+// this kernel delays execution for some specific scalar values
+Status delay(compute::KernelContext* ctx, const compute::ExecSpan& batch,
+ compute::ExecResult* out) {
+ const ArraySpan& input = batch[0].array;
+ const uint32_t* input_values = input.GetValues<uint32_t>(1);
+ uint8_t* output_values = out->array_span()->buffers[1].data;
+
+ // Boolean data is stored in 1 bit per value
+ for (int64_t i = 0; i < input.length; ++i) {
+ if (input_values[i] % 16 == 0) {
+ std::this_thread::sleep_for(std::chrono::milliseconds(10));
+ }
Review Comment:
Yes, I would just add that estimate into the comment to help future readers
(there is a difference between saying "it's probabilistic" and "chance of flake
is 3^-128 or ~10^62").
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