RFR: 8333151: Investigate if the Hotspot Arena chunk pools still make sense

[Afshin Zafari]

Using `ChunkPool` or not is investigated in this PR based on time and memory consumption.
Based on the tests using ChunkPool shows no better speed nor memory footprint.
Memory usage is taken from RSS reports of Linux API.

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Commit messages:
 - 8333151: Investigate if the Hotspot Arena chunk pools still make sense
 - Merge branch '_8333151_chunk_pool_test' of http://github.com/afshin-zafari/jdk into _8333151_chunk_pool_test
 - add memory footprint measurement
 - 8333151: Investigate if the Hotspot Arena chunk pools still make sense
 - rebase master
 - compare the memory footprint
 - add memory footprint measurement
 - 8333151: Investigate if the Hotspot Arena chunk pools still make sense

Changes: https://git.openjdk.org/jdk/pull/20411/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20411&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333151
  Stats: 119 lines in 3 files changed: 113 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/20411.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20411/head:pull/20411

PR: https://git.openjdk.org/jdk/pull/20411