RFR: CODETOOLS-7902875: jcstress: Employ actor affinity to run across/within interesting packages, cores, threads

[Aleksey Shipilev]

Current jcstress infrastructure is oblivious of CPU topology, and relies on luck to get the actors scheduled across/within interesting CPU packages, cores, threads. This can be done better by employing per-actor affinity, CPU topology parsing, and some combinatoric generators to cover all basic cases.

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Commit messages:
 - CODETOOLS-7902875: jcstress: Employ actor affinity to run across/within interesting packages, cores, threads

Changes: https://git.openjdk.java.net/jcstress/pull/30/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jcstress&pr=30&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902875
  Stats: 9360 lines in 50 files changed: 8990 ins; 283 del; 87 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/30.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/30/head:pull/30

PR: https://git.openjdk.java.net/jcstress/pull/30