RE: AIX support

Hi Heikki,

As requested earlier, I need some assistance from the Postgres side to identify any tool or testcase to calibrate the sync routine performance in Postgres.

I see the below tools for benchmarking.

• Pgbench https://www.postgresql.org/docs/current/pgbench.html
• Pg_test_fsync https://www.postgresql.org/docs/current/pgtestfsync.html
• pg_test_timing https://www.postgresql.org/docs/current/pgtesttiming.html

Please let me know, if these tools are fine or else ca you suggest us with any additional tools to run the benchmarking.

  > > Ok, if we don't need the assembler code at all, that's good. A patch to

  > > introduce AIX support should not change it for non-AIX powerpc systems

  > > though. That might be a good change, but would need to be justified

  > > separately, e.g.  by some performance testing, and should be a separate

  > > patch.

  > > If you make no changes to s_lock.h at all, will it work? Why not?

  > With the existing asm code I see there are some syntax errors, being hit.

  > But after reverting the old changes the issues resolved. Below are diffs.

  > Let me know if I need to run any perf tools to check the performance of

  > the __sync_lock_test_and_set change.