Addendum: After about a day of CPU time most of the refs are at 9 or
10 with their history length.

a.

On 28 Mrz., 14:18, alux <[email protected]> wrote:
> Hi,
>
> I played with Richs ant colony these days, and want to report about
> experience with 4 cores.
>
> First I didn't want my computer to idle, so I set
>
> * (def dim 140) was 80
> * (def food-places 13) was 35 - I hoped for more defined routes. In
> vain.
> * (def food-range 1000) was 100 to have enough.
>
> and the 3 sleep times to, well, zero.
>
> With only these changes the display was completely frozen and didn't
> unfroze even after an hour. I also got "Transaction failed after
> reaching retry limit" Exceptions.
>
> So I raised the value for :min-history as suggested by Rich.
> (def world .. (ref (struct cell 0 0) :min-history 2) ..)
>
> But 2 wasn't enough. Even with 5 the display wasnt good.
>
> I had to go up to until 7 to have an almost stable situation. When I
> looked at the ref-history-count after a while, a couple of the had
> rised to 8.
>
> So this value needed is almost in the range of reaching the
> default :max-history (the default is 10).
>
> This is what I want to share, maybe its of help to somebody.
>
> Kind regards, alux

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