Re: SMP buildworld times / performance tests

[Bruce Evans]

On Wed, 29 Mar 2000, Mike Smith wrote:

> Just following on from this, one thing that I can see immediately being 
> very important to me at least is a spinlock in the timecounter structure. 
> Calcru and various other things call microtime(), and we're going to want 
> to lock out updates and parallel accesses to the timecounter.  What 
> should we be using for an interrupt-disabling spinlock?

Nothing.  Accesses to the timecounter struct are already MP safe and fast.
Only the i8254 timecounter hardware currently needs interrupt-disabling,
but it is hopefully never used on SMP machines.

Bruce



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