[squeak-dev] Please add Robot support tools
herbertkoenig at gmx.net
Tue Feb 17 10:44:02 UTC 2015
unless we run under a real time OS the OS will prevent a process from
getting CPU cycles for arbitrary timespans.
So you cannot ensure that a Squeak program on a Pi will prevent a car
from bumping into an obstacle even if you set a very short pause time
for GC. Otherwise I'd set the pause equal to the longest time the OS
will pause Squeak.
Am 17.02.2015 um 05:06 schrieb Eliot Miranda:
> Instead of turning off GC, which will mean that eventually you'll run
> out if memory, you should ask what is the maximum pause time you want.
> Pause times for the scavenger in Sour are around a millisecond on
> typical hardware. Spur will introduce an incremental global scan-mark
> to collect old space some time this year and it will be set to have
> similar pause times as the scavenger. So how far would your car drift
> in 2ms? If you could tune the VM to pause for less than this, what
> pause time would be acceptable? Can you provide the range of times
> that spans from marginal to more than satisfactory?
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