| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-8260754 | openjdk8u292 | Andrew Hughes | P4 | Resolved | Fixed | b01 |
The implementation of memory_copy_longs in aarch64 does not do prefetch on backwards copies.
This can have a significant performance impact on some micro arches.
In addition there is a feature where -XX:PrefetchCopyIntervalInBytes is ignored and always set to 256
This can have a significant performance impact on some micro arches.
In addition there is a feature where -XX:PrefetchCopyIntervalInBytes is ignored and always set to 256
- backported by
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JDK-8260754 aarch64: memory copy does not prefetch on backwards copy
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- Resolved
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- relates to
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JDK-8257192 Integrate AArch64 JIT port into 8u
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- Resolved
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