RFR: 8269823: JFR: Eliminate 'is_large' check for native JFR event if the size range is certain

[Denghui Dong]

Hi,

Could I have a review of this improvement that eliminates 'is_large' if the event size range is certain?

JDK-8246260 introduced event large checks to reduce the recording size.
This check could be eliminated at compile/build time when one of the following conditions is satisfied:
1. if the max size is < 128
2. if the min size is >= 128

The max size and the min size could be computed for the most native events at the generation phase.

And I think this improvement may also be done for JDK events.

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

Commit messages:
 - format
 - trivial update
 - init

Changes: https://git.openjdk.java.net/jdk/pull/4670/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4670&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269823
  Stats: 169 lines in 5 files changed: 142 ins; 9 del; 18 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4670.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4670/head:pull/4670

PR: https://git.openjdk.java.net/jdk/pull/4670