8367158: C2: create better fill and copy benchmarks, taking alignment into account

[eme64]

Make sure to also investigate cases with over 100K. Maybe up to 100M or even gigabites. Though at some point we clearly leave the L1 and even larger caches. But would still be good to see what happens there.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8367158: C2: create better fill and copy benchmarks, taking alignment into account (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/27315/head:pull/27315
$ git checkout pull/27315

Update a local copy of the PR:
$ git checkout pull/27315
$ git pull https://git.openjdk.org/jdk.git pull/27315/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 27315

View PR using the GUI difftool:
$ git pr show -t 27315

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/27315.diff

[bridgekeeper]

👋 Welcome back epeter! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

@eme64 The following label will be automatically applied to this pull request:

• hotspot-compiler

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.