| From: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Subject: | Re: SerializeParamList vs machines with strict alignment |
| Date: | 2018-10-01 22:47:48 |
| Message-ID: | CAEepm=1QkD_udoP3sxc_fci7x3PXQu3-Q-E-oempRuciSNp05Q@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Oct 2, 2018 at 9:49 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Apparently the only somewhat-modern architecture that is resolutely
> unaligned-unfriendly is MIPS.
It's been a few years now since I worked on that architecture, but
Sparc is somewhat-modern and resolutely unaligned-unfriendly. It's
just that you can optionally install a trap handler that will do super
slow non-atomic misaligned access in software instead of blowing up
with SIGBUS. With the Sun toolchain you did that explicitly by
building with -misalign (though it's possible that more recent
compilers might be doing that without being asked?).
--
Thomas Munro
http://www.enterprisedb.com
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