Heap size startup hints #3415
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Heap size startup hints #3415
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amicic
requested review from
charliegracie,
mstoodle and
youngar
as code owners
dmitripivkine
approved these changes
Jan 2, 2019
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@genie-omr build all |
Some pre-req work to support Heap size startup hints feature in OpenJ9 - swapped initial order of allocate and survivor in Nursery Physical Arena to be able to expand early - introduce new reasons for expansion, which would be reported by verbose GC during early startup - introduce two tuning parameters, that will control how aggressively the feature is used. heapSizeStatupHintWeightNewValue is for now set to 0 (which effectively means the feature is disabled), but plan is to use more value of 0.8 or so (or remove historic averaging altogether), after some more testing is performed Signed-off-by: Aleksandar Micic <amicic@ca.ibm.com>
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@genie-omr build all |
charliegracie
approved these changes
Jan 7, 2019
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Some pre-req work to support Heap size startup hints feature in OpenJ9
Arena to be able to expand early
verbose GC during early startup
the feature is used. heapSizeStatupHintWeightNewValue is for now set to
0 (which effectively means the feature is disabled), but plan is to use
more value of 0.8 or so (or remove historic averaging altogether), after
some more testing is performed
Signed-off-by: Aleksandar Micic amicic@ca.ibm.com