Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/22490#discussion_r220413714
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/vectorized/ColumnarBatchBenchmark.scala
---
@@ -30,8 +30,15 @@ import org.apache.spark.util.collection.BitSet
/**
* Benchmark to low level memory access using different ways to manage
buffers.
+ * To run this benchmark:
+ * {{{
+ * 1. without sbt: bin/spark-submit --class <this class> <spark sql test
jar>
+ * 2. build/sbt "sql/test:runMain <this class>"
+ * 3. generate result: SPARK_GENERATE_BENCHMARK_FILES=1 build/sbt
"sql/test:runMain <this class>"
+ * Results will be written to "benchmarks/<this class>-results.txt".
--- End diff --
Could you put the name `ColumnarBatchBenchmark` instead of `<this class>`
at line 38? In the same document, this one `<this class>` means a different
value from the other two.
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