Re: AIX support

Hi Peter,
Thank you for your comments.

We’ve had a few discussions in the past regarding the changes related to the
spin lock. Some of those conversations stemmed from this thread:
        "https://www.postgresql.org/message-id/95a44be0-b2f8-464a-8984-771d892b1cac%40iki.fi"
The earlier assembly code was generic across the PPC platform. However, based
on previous discussions, we transitioned to using GCC-specific routines to
enhance platform independence and maintain generality.

These are the comments I have added, let me know if you need more info here.
    +/* On PPC, use the compiler provided Built-in functions for atomic memory
    + * exchange operations.
    + */

For reference, here are some benchmark statistics we gathered earlier:

"https://www.postgresql.org/message-id/CY8PR15MB5602EB54EFE30D4C21F061BEDB722%40CY8PR15MB5602.namprd15.prod.outlook.com"

I'll run some more benchmarking on this sync_lock and submit the results.
Meanwhile, it would be helpful if you and your team could take a look at the remaining changes.

Thank you,
Sriram.

The new status of this patch is: Needs review