RFR: 8355233: Add a DMB related benchmark

[Eric Caspole]

In addition to the details in the JBS, I changed the name from DoubleDMB to DMBCheck.

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Commit messages:
 - 8355233: Add a DMB related benchmark

Changes: https://git.openjdk.org/jdk/pull/24783/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24783&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355233
  Stats: 102 lines in 1 file changed: 102 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24783.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24783/head:pull/24783

PR: https://git.openjdk.org/jdk/pull/24783