| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | pgsql-hackers(at)postgresql(dot)org |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Mark Mielke <mark(at)mark(dot)mielke(dot)cc>, Magne Mæhre <Magne(dot)Mahre(at)sun(dot)com> |
| Subject: | Re: Spinlock backoff algorithm |
| Date: | 2007-11-15 02:57:18 |
| Message-ID: | 200711141857.18832.josh@agliodbs.com |
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| Lists: | pgsql-hackers |
Tom,
> I've got one upstairs (HPPA), and I believe that it's actually a pretty
> common situation in scientifically-oriented workstations from a few
> years back.
Last I checked, scientific workstations aren't exactly a common platform for
PostgreSQL servers.
The question is, for our most common platforms (like AMD and Intel) is the FPU
notably slower/more contended than integer division? I'd the impression that
it was, but my knowledge of chip architectures is liable to be out of date.
Can we have a hardware geek speak up?
--
Josh Berkus
PostgreSQL @ Sun
San Francisco
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