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Bug
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Resolution: Fixed
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P3
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25
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b26
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ppc
The C2 code using VSX instructions has poor performance on Power8. The following tests run into timeouts:
compiler/runtime/Test7196199.java
compiler/runtime/safepoints/TestRegisterRestoring.java
compiler/vectorization/TestFloat16VectorOperations.java
compiler/vectorization/TestVectorZeroCount.java
compiler/vectorization/TestVectorsNotSavedAtSafepoint.java
The performance is much better on Power9. We could switch off SuperwordUseVSX for Power8.
compiler/runtime/Test7196199.java
compiler/runtime/safepoints/TestRegisterRestoring.java
compiler/vectorization/TestFloat16VectorOperations.java
compiler/vectorization/TestVectorZeroCount.java
compiler/vectorization/TestVectorsNotSavedAtSafepoint.java
The performance is much better on Power9. We could switch off SuperwordUseVSX for Power8.
- relates to
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JDK-8351666 [PPC64] Make non-volatile VectorRegisters available for C2 register allocation
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- Resolved
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- links to
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Commit(master)
openjdk/jdk/457d9de8
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Review(master)
openjdk/jdk/25514