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1 point by akkartik 5356 days ago | link | parent

Did you really run that over 10 hours?

Update: I tried your test with lower sleep intervals and didn't see the error (sleep:/ (rand 40) (inc:rand 5000))



2 points by palsecam 5355 days ago | link

> Did you really run that over 10 hours?

I never say I did.

  arc> (= var 0  tbl (obj var 0))
  #hash((var . 0))
  arc> (time:repeat 50000 (thread (sleep:/ (rand 40) (inc:rand 50)) (++ var) (++ tbl!var)))
  time: 9173 msec.  ; <-- not 10 hours...
  nil
  arc> var
  48152
  arc> tbl!var
  32039
> I tried your test with lower sleep intervals and didn't see the error

Even w/ lower intervals, it is buggy on my computer:

  arc> (= var 0  tbl (obj var 0))
  #hash((var . 0))
  arc> (time:repeat 50000 (thread (sleep:/ (rand 40) (inc:rand 5000)) (++ var) (++ tbl!var)))
  time: 5391 msec.
  nil
  arc> tbl!var
  49849
  arc> var
  49859
(Running on the Ubuntu/MzScheme combo described in previous comment, and on plain vanilla Arc 3.1 (ycombinator.com/arc/arc3.1.tar). Runned ~10 times, each time the results are different but never 50000)

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1 point by akkartik 5355 days ago | link

Yes, reproduced on ubuntu/mz4.2.4 (sorry I was making stupid mistakes last night when I tried it out). On snow leopard/mz4.2.2 the tbl!var is always at 50k, but the global var is always lower. I've seen it as low as 43866.

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