Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/17472#discussion_r108837689
--- Diff: common/unsafe/src/main/java/org/apache/spark/unsafe/Platform.java
---
@@ -46,18 +46,22 @@
private static final boolean unaligned;
static {
boolean _unaligned;
- // use reflection to access unaligned field
- try {
- Class<?> bitsClass =
- Class.forName("java.nio.Bits", false,
ClassLoader.getSystemClassLoader());
- Method unalignedMethod = bitsClass.getDeclaredMethod("unaligned");
- unalignedMethod.setAccessible(true);
- _unaligned = Boolean.TRUE.equals(unalignedMethod.invoke(null));
- } catch (Throwable t) {
- // We at least know x86 and x64 support unaligned access.
- String arch = System.getProperty("os.arch", "");
- //noinspection DynamicRegexReplaceableByCompiledPattern
- _unaligned =
arch.matches("^(i[3-6]86|x86(_64)?|x64|amd64|aarch64)$");
+ if (arch.matches("^(ppc64le | ppc64)$")) {
+ // Since java.nio.Bits.unaligned() doesn't return true on ppc (See
JDK-8165231), but ppc64 and ppc64le support it
+ _unaligned = true;
+ } else {
+ try {
+ Class<?> bitsClass =
+ Class.forName("java.nio.Bits", false,
ClassLoader.getSystemClassLoader());
+ Method unalignedMethod = bitsClass.getDeclaredMethod("unaligned");
+ unalignedMethod.setAccessible(true);
+ _unaligned = Boolean.TRUE.equals(unalignedMethod.invoke(null));
+ } catch (Throwable t) {
+ // We at least know x86 and x64 support unaligned access.
+ String arch = System.getProperty("os.arch", "");
--- End diff --
Should we define `arch` before the `if` statement, now?
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