[jdk8u-dev] RFR: 8228658: test GetTotalSafepointTime.java fails on fast Linux machines with Total safepoint time 0 ms

[SendaoYan]

Hi all,
  We observerd the test `sun/management/HotspotRuntimeMBean/GetTotalSafepointTime.java` intermittent fails on jdk8u-dev. The failure phenomenon samt to [JDK-8228658](https://bugs.openjdk.org/browse/JDK-8228658). So I want to backport this PR from jdk11u-dev to jdk8u-dev.

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Commit messages:
 - Backport c4e0c2656caaba67128f75d733b4452def9a7afc

Changes: https://git.openjdk.org/jdk8u-dev/pull/578/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=578&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8228658
  Stats: 42 lines in 1 file changed: 10 ins; 24 del; 8 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/578.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/578/head:pull/578

PR: https://git.openjdk.org/jdk8u-dev/pull/578