RFR (S): 8200233: Simple G1 evacuation path performance enhancements (original) (raw)
Stefan Johansson stefan.johansson at oracle.com
Mon Mar 26 15:19:58 UTC 2018
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Looks good, Stefan
On 2018-03-26 13:48, Thomas Schatzl wrote:
Hi all,
can I have reviews for these very tiny (and ultimately note really measureable) improvements to the G1 evacuation path? They are: - some stores can be made OOPNOTNULL - the path for compressed/uncompressed oops when popping elements from the task queue during evacuation can be specialized: compressed oops are never array oops so saving the useless test - some load of the "from" region in the evacuation path can be delayed and in many cases actually avoided CR: https://bugs.openjdk.java.net/browse/JDK-8200233 Webrev: http://cr.openjdk.java.net/~tschatzl/8200233/webrev/ Testing: hs-tier-1 Thanks, Thomas
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