Re: Reduce timing overhead of EXPLAIN ANALYZE using rdtsc? - Mailing list pgsql-hackers

On Sun, Apr 5, 2026 at 2:00 AM Lukas Fittl <lukas@fittl.com> wrote:
>
> On Sat, Apr 4, 2026 at 2:21 AM Lukas Fittl <lukas@fittl.com> wrote:
> > See attached v17.
>
> This needed a rebase after 5e13b0f240397b2, see attached v18.
>
> Looking at the changes in that commit, I also ended up re-ordering the
> feature flags in pg_cpu.h, so we have the 128/256/512 bit registers
> first, and then hypervisor and TSC flags after the 512 bit registers.

v18-0002 looks good to me as far as feature-detection, but aside from
that there are plenty of domain-specific details that I lack the means
to check on short notice. I did verify that OSXSAVE support is still
functional.

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John Naylor
Amazon Web Services