Integrated: 8343978: Update the default value of CodeEntryAlignment for Ampere-1A and 1B

[Liming Liu]

On Fri, 15 Nov 2024 07:01:23 GMT, Liming Liu <lliu at openjdk.org> wrote:

> This PR updates the default value of CodeEntryAlignment for Ampere-1A and 1B from 64 to 32. The microbenchmark CodeCacheStress shows that frontend stall becomes ~21% smaller by the change, and IPC increases by ~2.8%. The benefits persist after CodeCacheSegmentSize changes from 64 back to 128.
> 
> Ran JTReg tier1 on Ampere-1A and no new issues were found.

This pull request has now been integrated.

Changeset: 89ee1a55
Author:    Liming Liu <lliu at openjdk.org>
Committer: Dean Long <dlong at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/89ee1a5517ea1e3915f4362ada3d2086b63c107e
Stats:     4 lines in 1 file changed: 4 ins; 0 del; 0 mod

8343978: Update the default value of CodeEntryAlignment for Ampere-1A and 1B

Reviewed-by: dlong, kvn

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PR: https://git.openjdk.org/jdk/pull/22134