Re: Spinlock backoff algorithm

Josh Berkus wrote:
> 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 it was, but my knowledge of chip architectures is liable to be out of date.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?
> 

http://www.intel.com/performance/server/xeon/intspd.htm
http://www.intel.com/performance/server/xeon/fpspeed.htm


Sincerely,

Joshua D. Drake