RFR: 8262386: resourcehogs/serviceability/sa/TestHeapDumpForLargeArray.java timed out [v7]

[Lin Zang]

> 8262386: resourcehogs/serviceability/sa/TestHeapDumpForLargeArray.java timed out

Lin Zang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:

 - Merge branch 'master' into sf
 - rename writeThrough to unbufferedMode and code refine
 - fix typo in comments
 - Merge branch 'master' into sf
 - Revert "reduce memory consumption"
   
   This reverts commit 70e43ddd453724ce36bf729fa6489c0027957b8e.
 - reduce memory consumption
 - code refine
 - 8262386: resourcehogs/serviceability/sa/TestHeapDumpForLargeArray.java timed out

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2803/files
  - new: https://git.openjdk.java.net/jdk/pull/2803/files/bb5827da..a1732514

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2803&range=06
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2803&range=05-06

  Stats: 4276 lines in 295 files changed: 2033 ins; 1240 del; 1003 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2803.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2803/head:pull/2803

PR: https://git.openjdk.java.net/jdk/pull/2803