[Vm-dev] [Pharo-dev] Problem with OSSubprocess / signals / heartbeat ?

Levente Uzonyi leves at caesar.elte.hu
Fri Mar 31 13:42:48 UTC 2017

On Thu, 30 Mar 2017, Eliot Miranda wrote:

> Once the active process is in a tight loop the delay is effectively 
disabled because the tight loop effectively shuts out the heartbeat thread 
and hence the system never notices that the delay has expired.

I think that won't happen, because the process scheduler (O(1), CFS, BFS) 
on linux is not cooperative. So, the kernel will periodically preempt the 
main thread and run the heartbeat thread no matter what their priorities 
are. The higher priority only provides lower jitter on the heartbeat 


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