RFR: 8256949: Shenandoah: ditch allocation spike and GC penalties handling

Tue Nov 24 12:59:00 UTC 2020

Following the improvements in JDK-8255984, I think we can dispense with old-style allocation spike and GC penalties handling. JDK-8255984 is supposed to accommodate both cases now. This issue is to have a base for performance evaluation.

Additional testing:
 - [x] Linux x86_64 `hotspot_gc_shenandoah`

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Commit messages:
 - 8256949: Shenandoah: ditch allocation spike and GC penalties handling

Changes: https://git.openjdk.java.net/jdk/pull/1409/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1409&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256949
  Stats: 59 lines in 4 files changed: 0 ins; 55 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1409.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1409/head:pull/1409

PR: https://git.openjdk.java.net/jdk/pull/1409