Re: Spinlock performance improvement proposal

> I wrote:
> > The following proposal should improve performance substantially when
> > there is contention for a lock, but it creates no portability risks
> > ...
>
> I have committed changes to implement this proposal. I'm not seeing
> any significant performance difference on pgbench on my single-CPU
> system ... but pgbench is I/O bound anyway on this hardware, so that's
> not very surprising. I'll be interested to see what other people
> observe. (Tatsuo, care to rerun that 1000-client test?)

I ran with 20 clients:

$ pgbench -i test
$ pgbench -c 20 -t 100 test

and see no difference in tps performance between the two lock
implementations. I have a Dual PIII 550MHz i386 BSD/OS machine with
SCSI disks.

--
Bruce Momjian | http://candle.pha.pa.us
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