[crac] Integrated: 8321660: [CRaC] Trim native heap before checkpoint to decrease image size

[Volker Simonis]

On Sun, 10 Dec 2023 18:45:50 GMT, Volker Simonis <simonis at openjdk.org> wrote:

> Before checkpointing, we should trim the native C-heap in order to decrease the size of the generated CRaC image.
> 
> Without C-heap trimming, the size of a HelloWorld image is ~32m and the one for SpringPetclinic ~209m. If we trim the C-heap before checkpointin, the image size decreses to ~30m for HelloWorld and 170m for SpringPetclinic.
> 
> I've also added a new logging tag `crac` because I think it would be nice to log more CRaC details/internals in universal logging.  
> 
> Please let me know what you think?

This pull request has now been integrated.

Changeset: a3d56c25
Author:    Volker Simonis <simonis at openjdk.org>
URL:       https://git.openjdk.org/crac/commit/a3d56c25eb2b68779a66145bb8d9d443f13c1d68
Stats:     16 lines in 2 files changed: 13 ins; 2 del; 1 mod

8321660: [CRaC] Trim native heap before checkpoint to decrease image size

Reviewed-by: rvansa

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PR: https://git.openjdk.org/crac/pull/148