RFR: JDK-8222719: adjust libperfstat usage on AIX

Thu Jan 18 15:40:18 UTC 2024

On Wed, 17 Jan 2024 08:21:28 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> Currently we use libperfstat with dlopen/dladdr, see src/hotspot/os/aix/libperfstat_aix.hpp (+cpp) .
> For compatibility reason we have support for  different versions of this API.
> However the AIX 5.3 / 6.1  support is outdated now, AIX versions older than 7.X are not supported any more by the current OpenJDK . So remove support for those old API versions.

Hi Christoph and Goetz, thanks for the reviews .

> Seems ok, but why not resort to statically linking against the build system's libperfstat nowadays?

Probably this could be done; on the other hand, the way we do it now (and do it for a long time) supports nicely different perfstat API versions.  This is not so bad (and also potentially relevant with AIX 7.2 vs. 7.3 and different TLs) .

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PR Comment: https://git.openjdk.org/jdk/pull/17460#issuecomment-1898715142