Re: [Bug-gnubg] What does the cache do?

[Øystein Johansen]

address@hidden wrote:

> What does the cache setting do?
GNU Backgammon takes some of the memory and uses it as cache. When gnubg 
makes an evaluations and saves the results from the evaluation (All 
equities and probabilities) in the cache memory. Then starting a new 
evaluation it first checks the cache memory to see if this position is 
stored from a previous evaluation. If it is it just takes the equities 
and probabilities from the cache. Else it calculates the probabilities 
and equities from the neural nets.

Retriving evaluation results from cache memory is much faster than doing 
evaluations of the neural net!

The user can adjust the size of the cache memory. The size is given in 
number of enteries. Jørn, what's the size of a evaluation stored? 6 x 
sizeof(float)?

BTW
Jørn, should we reimplement the "Clear cache" button we did in Alborg in 
february? I think I've lost it, before it was commited to the CVS. And 
as you said: The "clear cache" function should also be called when 
changing METs. (Currently I have to set the cache size to 0, when I play 
around with different METs.)

-Øystein