Jonas Maebe wrote:
On 3 mrt 2006, at 13:42, Vinzent Hoefler wrote:
BTW, I never would have guessed that the random number generator
would have used threadvars. I would have thought, that on app start
you would set one randseed and then call random from all threads.
Considering that the state array for the Mersenne Twister is an
unprotected global variable, calling random from different threads
looks like a bad idea to me.
I mean, it surely gives you sort of random values, but ...
That's why its state (and indeed not just randseed) should be threadvars.
Or use some locking mechanism. That would be slower, but would safe some
memory.
Vincent
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