Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/16403#discussion_r94264691
--- Diff: common/unsafe/src/main/java/org/apache/spark/unsafe/Platform.java
---
@@ -244,6 +251,18 @@ public static void throwException(Throwable t) {
LONG_ARRAY_OFFSET = _UNSAFE.arrayBaseOffset(long[].class);
FLOAT_ARRAY_OFFSET = _UNSAFE.arrayBaseOffset(float[].class);
DOUBLE_ARRAY_OFFSET = _UNSAFE.arrayBaseOffset(double[].class);
+
+ // determine whether double access should be aligned.
+ String arch = System.getProperty("os.arch", "");
+ if (arch.matches("^(arm|arm32)")) {
--- End diff --
Thanks for your clarification. I was afraid that ARM 64 may return `arm`.
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