Integrated: 8297343: TestStress*.java fail with "got different traces for the same seed"

[Roland Westrelin]

On Thu, 24 Nov 2022 15:27:41 GMT, Roland Westrelin <roland at openjdk.org> wrote:

> Root cause from Roberto's analysis:
> 
> "The regression seems to be due to the introduction of non-determinism
> in the node dumps of otherwise identical compilations."
> 
> "The problem seems to be that JDK-6312651 dumps interface sets in an
> order that is determined by the raw pointers of the set elements. This
> is unstable across different runs and leads to different node dumps
> for otherwise identical compilations."
> 
> "Stable node dumps are useful for debugging (e.g. when diffing
> compiler traces from two different runs), so the solution is probably
> dumping interface sets in some order (e.g. lexicographic order of each
> interface dump) that does not depend on raw pointer values."
> 
> This patch implements Roberto's recommendation by sorting interfaces
> on their ciBaseObject::_ident.

This pull request has now been integrated.

Changeset: eff4c039
Author:    Roland Westrelin <roland at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/eff4c039dab99aa946dbdde1be8901929ebbfc6f
Stats:     14 lines in 2 files changed: 9 ins; 3 del; 2 mod

8297343: TestStress*.java fail with "got different traces for the same seed"

Reviewed-by: thartmann, chagedorn

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

PR: https://git.openjdk.org/jdk/pull/11357