| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Manabu Ori <manabu(dot)ori(at)gmail(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Tatsuo Ishii <ishii(at)postgresql(dot)org>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: spinlocks on powerpc |
| Date: | 2012-01-03 22:21:36 |
| Message-ID: | CA+TgmoYAw+VN_XKGFO6qCJg-5TxK5u0nrtsGDr=kzB3DO1Co_w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Jan 3, 2012 at 4:17 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> For Itanium, I was able to find some fairly official-looking
>> documentation that said "this is how you should do it". It would be
>> nice to find something similar for PPC64, instead of testing every
>> machine and reinventing the wheel ourselves.
>
> You are aware that our spinlock code is pretty much verbatim from the
> PPC ISA spec, no? The issue here is that the "official documentation"
> has been a moving target over the decades the ISA has been in existence.
I wasn't aware of that, but I think my basic point still stands: it's
gonna be painful if we have to test large numbers of different PPC
boxes to figure all this out...
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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