Re: Performance TODO items

> > > > We could use POSIX spinlocks/semaphores now but we
> > > > don't because of performance, right?
> > > 
> > > No. As long as no one proved with test that mutexes are bad for
> > > performance...
> > > Funny, such test would require ~ 1 day of work.
> > 
> > Good question. I know the number of function calls to spinlock stuff
> > is huge. Seems real semaphores may be a big win on multi-cpu boxes.
> 
> Ok, being tired of endless discussions I'll try to use mutexes instead
> of spinlocks and run pgbench on my Solaris WS 10 and E4500 (4 CPU) boxes.

I have updated the TODO list with:
   * Improve spinlock code        o use SysV semaphores or queue of backends waiting on the lock       o wakeup sleeper
orsleep for less than one clock tick        o spin for lock on multi-cpu machines, yield on single cpu machines       o
read/writelocks
 

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