Re: How does spin count really works

bchorng_at_yahoo.com (Bass Chorng) wrote:
> I have a question on how spin counting really works.
>
> Lets assume the default of 2000 on _spin_count. So a latch
> miss session starts kernel code loop for 2000 times and try
> it again.

No, I think it just tries again, upto 2000 times.

> My question is does it check again only after completing the 2000
> loops or it will stop in the middle if the latch is available before
> completing the loop ?
>
> If it is the latter, how does it know that latch is available halfway ?

Because the latch is the thing that it is spinning on.

Xho

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