Github user sameeragarwal commented on a diff in the pull request:
https://github.com/apache/spark/pull/13161#discussion_r66648811
--- Diff:
core/src/main/java/org/apache/spark/util/collection/unsafe/sort/RadixSort.java
---
@@ -205,13 +210,14 @@ public static int sortKeyPrefixArray(
* getCounts with some added parameters but that seems to hurt in
benchmarks.
*/
private static long[][] getKeyPrefixArrayCounts(
- LongArray array, int numRecords, int startByteIndex, int
endByteIndex) {
+ LongArray array, int startIndex, int numRecords, int startByteIndex,
int endByteIndex) {
long[][] counts = new long[8][];
long bitwiseMax = 0;
long bitwiseMin = -1L;
- long limit = array.getBaseOffset() + numRecords * 16;
+ long baseOffset = array.getBaseOffset() + startIndex * 8;
+ long limit = baseOffset + numRecords * 16;
--- End diff --
`numRecords * 16L`
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