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  1. JDK
  2. JDK-8247358

Shenandoah: reconsider free budget slice for marking

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    Backports

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        Currently, every phase in normal cycle gets 1/3 (mark), 1/2 (evac) and 1 (update-refs) of the free heap. It makes sense when the allocation rate is constant and there is no reclamation of immediate garbage. However, if we ditch a lot of immediate garbage after the mark, we make the pacer for mark 3x more aggressive without good reason.

        Since at least adaptive heuristics starts the cycle so that allocation rate would not deplete the heap soon, we can instead assign 1 of free heap to mark. Leaving 1/2 to evac seems to be fruitful nevertheless: it insulates from oom-evac, and leaves some headroom for update-refs.

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8247871 Shenandoah: reconsider free budget slice for marking

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8248955 Shenandoah: reconsider free budget slice for marking

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8249110 Shenandoah: reconsider free budget slice for marking

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8250063 Shenandoah: reconsider free budget slice for marking

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8250361 Shenandoah: reconsider free budget slice for marking

            • P3 - Major loss of function.
            • Resolved
            duplicates

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8247467 Shenandoah: reconsider free budget slice for marking

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

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                shade Aleksey Shipilev
                shade Aleksey Shipilev
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