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Type:
Bug
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Resolution: Duplicate
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Priority:
P4
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Affects Version/s: 16, 17, 18
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Component/s: hotspot
All GCs (Serial, Parallel, G1, Shenandoah, Z) are effected; 15-20% regression for different GCs.
```
java -Xms4g -Xmx4g -jar dacapo-9.12-MR1-bach.jar h2 -s huge -t 1 -n 1
```
Example of output using G1:
Before
===== DaCapo 9.12-MR1 h2 PASSED in 124958 msec =====
After
===== DaCapo 9.12-MR1 h2 PASSED in 151726 msec =====
So far the regression is observed only on Intel, but not on AMD.
More testing shows that this regression is only for single thread. If I use more threads (e.g. -t 2), the regression seems to go away.
```
java -Xms4g -Xmx4g -jar dacapo-9.12-MR1-bach.jar h2 -s huge -t 1 -n 1
```
Example of output using G1:
Before
===== DaCapo 9.12-MR1 h2 PASSED in 124958 msec =====
After
===== DaCapo 9.12-MR1 h2 PASSED in 151726 msec =====
So far the regression is observed only on Intel, but not on AMD.
More testing shows that this regression is only for single thread. If I use more threads (e.g. -t 2), the regression seems to go away.
- duplicates
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- Closed
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JDK-8277180 Intrinsify recursive ObjectMonitor locking for C2 x64 and A64
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- Resolved
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- Resolved
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- relates to
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- Resolved
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- Resolved
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