RFR: CODETOOLS-7902952: jcstress: Disable UsePerfData to improve I/O costs

[Aleksey Shipilev]

Sample runs shows >10 MB/s write I/O with -m sanity on large machine. Those writes seem to originate from UsePerfData subsystem. We should do -XX:-UsePerfData, since jcstress does not need it anyway.

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

Commit messages:
 - CODETOOLS-7902952: jcstress: Disable UsePerfData to improve I/O costs

Changes: https://git.openjdk.java.net/jcstress/pull/60/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jcstress&pr=60&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902952
  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/60.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/60/head:pull/60

PR: https://git.openjdk.java.net/jcstress/pull/60