Details
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Enhancement
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Resolution: Fixed
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P4
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17
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b14
Description
Unsafe::copyMemory0 intrinsic unconditionally inserts barriers arounds the call. It is conservative and barriers can be avoided in some cases (similar to what is done for scalar unsafe accesses; e.g., copying between on-heap arrays and off-heap is one of such cases).
Attachments
Issue Links
- duplicates
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JDK-8269128 C2: Avoid redundant memory barriers in Unsafe.copyMemory0 intrinsic
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- Closed
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- relates to
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JDK-8283122 [AIX, s390] UnsafeCopyMemory 'Mismatched' Tests Fail on Big Endian Systems
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- Resolved
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JDK-8316756 C2 EA fails with "missing memory path" when encountering unsafe_arraycopy stub call
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- Resolved
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JDK-8268822 Performance of bulk copy with segments seems suboptimal
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- Closed
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(1 links to)