RFR: 8371571: Consolidate and enhance bulk memory segment ops benchmarks

[Emanuel Peter]

On Wed, 12 Nov 2025 09:08:10 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes to consolidate and standardize the benchmarks related to the bulk operations for memory segments. 
> 
> All the benchmarks will now run with (heap|native)x(aligned|unaligned)x(intint|intlong|longlong) combinations.
> 
> It should be noted that with this change, the running time for the benchmarks would increase significantly.

Drive by comment for now. Nice effort, to unify the benchmarks :)

test/micro/org/openjdk/bench/java/lang/foreign/SegmentBulkMismatch.java line 122:

> 120:                     srcSegment = srcSegment.asSlice(1, size);
> 121:                     dstSegment = dstSegment.asSlice(1, size);
> 122:                 }

What do you hope to acheive with this? I hope that the intrinsics automatically align the vectors, right? Or are you checking for exactly that?

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PR Review: https://git.openjdk.org/jdk/pull/28260#pullrequestreview-3453489287
PR Review Comment: https://git.openjdk.org/jdk/pull/28260#discussion_r2518338346