From: Earle Clubb <eclubb@...>
Date: 2007-04-27T04:57:21+09:00
Subject: 10 millisecond delay/callback

I need to perform a task every 10ms.  I've been using
kernel.sleep(0.01), but sleep seems to be slow and erratic at sub-second
resolutions.  Here's a test I ran along with the results:

irb(main):001:0> 0.upto(25) do
irb(main):002:1* puts Time.now.usec/1000
irb(main):003:1> STDOUT.flush
irb(main):004:1> sleep 0.01
irb(main):005:1> end
105
132
143
162
191
205
219
238
257
277
294
311
330
354
366
385
412
431
450
468
488
504
522
542
556
581
=> 0
irb(main):006:0>


So I'm wondering if there's a way to get a steady 10ms delay.  Another
option would be to set up an alarm or scheduled callback or something
every 10ms.  Is this possible.

Thanks,
Earle

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