| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Florian Weimer <fweimer(at)bfk(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: optimizing repeated MVCC snapshots |
| Date: | 2012-01-05 14:35:45 |
| Message-ID: | CA+TgmoZ2aEDMv=z0O2yCKzFxiaZ8QO8h=ywvJn80YOmJa1FdOA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jan 5, 2012 at 9:01 AM, Florian Weimer <fweimer(at)bfk(dot)de> wrote:
> * Robert Haas:
>> and (c) architectures (like 32-bit x86) where ordinary 64-bit
>> operations aren't atomic but special instructions (cmpxchg8b) can be
>> used to get that behavior.
>
> FILD and FIST are atomic, too, and are supported by more
> micro-architectures.
Yeah, I think you (or someone) mentioned the code. If someone wants
to write the code, I'm game...
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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