Re: [Bug-gnubg] Multithreaded rollouts

[Jonathan Kinsey]

Ian Shaw wrote:
> 
>> I've made the rollout code multithread, I've left a copy of 
>> the old code so compiling with USE_MULTITHRAED=0 should be 
>> the same as before.
>>
>> It was quite straight-forward, I've made each thread do 
>> trials independently, it just took a bit of thinking about 
>> which trial each thread was doing.  One thing I didn't do was 
>> the catching up of a candidate if it fails back within a jsd 
>> range (I doubt this is important, it could be done if it is).
>>
>> I was amazed that the results of a couple of tests were 
>> exactly the same
>> (single/multithreaded) and got a bit under 90% speed 
>> improvement on a dual core machine.
>>
> 
> Way to go, Jon!
> 
> Mmmm, Dual Core... Must have dual core (drool).

I think you need a quad core really...  I wouldn't rush out and buy a
new computer until it's been tested and shown to work...

Jon

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