On Fri, 12 Apr 2024 22:43:15 GMT, Vladimir Kozlov <k...@openjdk.org> wrote:
> This is part of changes which try to reduce size of `nmethod` and `codeblob` > data vs code in CodeCache. > These changes reduced size of `nmethod` header from 288 to 232 bytes. From > 304 to 248 in optimized VM: > > Statistics for 1282 bytecoded nmethods for C2: > total in heap = 5560352 (100%) > header = 389728 (7.009053%) > > vs > > Statistics for 1322 bytecoded nmethods for C2: > total in heap = 8307120 (100%) > header = 327856 (3.946687%) > > > Several unneeded fields in `nmethod` and `CodeBlob` were removed. Some fields > were changed from `int` to `int16_t` with added corresponding asserts to make > sure their values are fit into 16 bits. > > I did additional cleanup after recent `CompiledMethod` removal. > > Tested tier1-7,stress,xcomp and performance testing. This pull request has now been integrated. Changeset: b704e912 Author: Vladimir Kozlov <k...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/b704e91241b0f84d866f50a8f2c6af240087cb29 Stats: 523 lines in 15 files changed: 135 ins; 186 del; 202 mod 8329433: Reduce nmethod header size Reviewed-by: dlong, iveresov ------------- PR: https://git.openjdk.org/jdk/pull/18768
