Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/22661#discussion_r224678241
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/benchmark/JoinBenchmark.scala
---
@@ -19,229 +19,163 @@ package org.apache.spark.sql.execution.benchmark
import org.apache.spark.sql.execution.joins._
import org.apache.spark.sql.functions._
+import org.apache.spark.sql.internal.SQLConf
import org.apache.spark.sql.types.IntegerType
/**
- * Benchmark to measure performance for aggregate primitives.
- * To run this:
- * build/sbt "sql/test-only *benchmark.JoinBenchmark"
- *
- * Benchmarks in this file are skipped in normal builds.
+ * Benchmark to measure performance for joins.
+ * To run this benchmark:
+ * {{{
+ * 1. without sbt:
+ * bin/spark-submit --class <this class> --jars <spark core test jar>
<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/JoinBenchmark-results.txt".
+ * }}}
*/
-class JoinBenchmark extends BenchmarkWithCodegen {
+object JoinBenchmark extends SqlBasedBenchmark {
- ignore("broadcast hash join, long key") {
+ def broadcastHashJoinLongKey(): Unit = {
val N = 20 << 20
val M = 1 << 16
- val dim = broadcast(sparkSession.range(M).selectExpr("id as k",
"cast(id as string) as v"))
- runBenchmark("Join w long", N) {
- val df = sparkSession.range(N).join(dim, (col("id") % M) ===
col("k"))
+ val dim = broadcast(spark.range(M).selectExpr("id as k", "cast(id as
string) as v"))
+ codegenBenchmark("Join w long", N) {
+ val df = spark.range(N).join(dim, (col("id") % M) === col("k"))
assert(df.queryExecution.sparkPlan.find(_.isInstanceOf[BroadcastHashJoinExec]).isDefined)
df.count()
}
-
- /*
- Java HotSpot(TM) 64-Bit Server VM 1.7.0_60-b19 on Mac OS X 10.9.5
- Intel(R) Core(TM) i7-4558U CPU @ 2.80GHz
- Join w long: Best/Avg Time(ms) Rate(M/s)
Per Row(ns) Relative
-
-------------------------------------------------------------------------------------------
- Join w long codegen=false 3002 / 3262 7.0
143.2 1.0X
- Join w long codegen=true 321 / 371 65.3
15.3 9.3X
- */
}
- ignore("broadcast hash join, long key with duplicates") {
+ def broadcastHashJoinLongKeyWithDuplicates(): Unit = {
val N = 20 << 20
val M = 1 << 16
-
- val dim = broadcast(sparkSession.range(M).selectExpr("id as k",
"cast(id as string) as v"))
- runBenchmark("Join w long duplicated", N) {
- val dim = broadcast(sparkSession.range(M).selectExpr("cast(id/10 as
long) as k"))
- val df = sparkSession.range(N).join(dim, (col("id") % M) ===
col("k"))
+ val dim = broadcast(spark.range(M).selectExpr("cast(id/10 as long) as
k"))
+ codegenBenchmark("Join w long duplicated", N) {
+ val df = spark.range(N).join(dim, (col("id") % M) === col("k"))
assert(df.queryExecution.sparkPlan.find(_.isInstanceOf[BroadcastHashJoinExec]).isDefined)
df.count()
}
-
- /*
- *Java HotSpot(TM) 64-Bit Server VM 1.7.0_60-b19 on Mac OS X 10.9.5
- *Intel(R) Core(TM) i7-4558U CPU @ 2.80GHz
- *Join w long duplicated: Best/Avg Time(ms) Rate(M/s)
Per Row(ns) Relative
-
*-------------------------------------------------------------------------------------------
- *Join w long duplicated codegen=false 3446 / 3478 6.1
164.3 1.0X
- *Join w long duplicated codegen=true 322 / 351 65.2
15.3 10.7X
- */
}
- ignore("broadcast hash join, two int key") {
+ def broadcastHashJoinTwoIntKey(): Unit = {
val N = 20 << 20
val M = 1 << 16
- val dim2 = broadcast(sparkSession.range(M)
+ val dim2 = broadcast(spark.range(M)
.selectExpr("cast(id as int) as k1", "cast(id as int) as k2",
"cast(id as string) as v"))
- runBenchmark("Join w 2 ints", N) {
- val df = sparkSession.range(N).join(dim2,
+ codegenBenchmark("Join w 2 ints", N) {
+ val df = spark.range(N).join(dim2,
(col("id") % M).cast(IntegerType) === col("k1")
&& (col("id") % M).cast(IntegerType) === col("k2"))
assert(df.queryExecution.sparkPlan.find(_.isInstanceOf[BroadcastHashJoinExec]).isDefined)
df.count()
}
-
- /*
- *Java HotSpot(TM) 64-Bit Server VM 1.7.0_60-b19 on Mac OS X 10.9.5
- *Intel(R) Core(TM) i7-4558U CPU @ 2.80GHz
- *Join w 2 ints: Best/Avg Time(ms) Rate(M/s)
Per Row(ns) Relative
-
*-------------------------------------------------------------------------------------------
- *Join w 2 ints codegen=false 4426 / 4501 4.7
211.1 1.0X
- *Join w 2 ints codegen=true 791 / 818 26.5
37.7 5.6X
- */
--- End diff --
For now, I also cannot get a consistent result like above. I mean I got the
same weird result like you. Let me take a look this more.
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