Re: Spinlock backoff algorithm

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От Josh Berkus
Тема Re: Spinlock backoff algorithm
Дата
Msg-id 200711141857.18832.josh@agliodbs.com
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Ответ на Re: Spinlock backoff algorithm  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Spinlock backoff algorithm  ("Joshua D. Drake" <jd@commandprompt.com>)
Re: Spinlock backoff algorithm  (Steve Atkins <steve@blighty.com>)
Re: Spinlock backoff algorithm  (Martijn van Oosterhout <kleptog@svana.org>)
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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it was, but my knowledge of chip architectures is liable to be out of date.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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