igor I like the idea. It provides a solution not depending on the scheduler strategy. We should implement it :)
Stef On Aug 8, 2011, at 10:42 PM, Igor Stasenko wrote: > On 8 August 2011 22:17, Sean P. DeNigris <[email protected]> wrote: >> >> Igor Stasenko wrote: >>> >>> the problem is that you cannot interrupt >>> it, by pressing Alt-. (or Cmd-. on macs)? >>> >> >> Right, smart ass ;-) > > Well, it works for me, if i press it multiple times :) > > InputEventFetcher default eventHandlers > > an OrderedCollection(an InputEventSensor an UserInterruptHandler) > > So, all logic whether interrupt the process or not, is in #handleUserInterrupt > > i think we should change it: > > toInterrupt := Processor preemptedProcess. > "Only interrupt processes which are potentially > blocking the UI" > toInterrupt priority < UIManager default uiProcess > priority > ifTrue: [toInterrupt := Project uiProcess]. > > "Fork at lower priority to avoid interrupting > system-critical processes" > toInterrupt debugWithTitle: 'User Interrupt'] > forkAt: Processor activeProcess priority -1 > > the #preemptedProcess is not works, because it actually tries to > guess, which process was preempted, instead of knowing it exactly. > > What i think we should do is to extend the UserInterruptHandler to > > a) have a registry of system-critical processes , which should never > be interrupted: this is Delay, Event fetcher, interrupt handler, > weak finalizer, idle process > All those facilities should register themselves in > UserInterruptHandler whenever they deciding to start or restart their > process. > > > b) interrupt the first process, not found in (a), going from higher > priority to lower. > Then if you press the cmd-. multiple times, you will be able to > interrupt anything which is not system-critical. > > Because there is no reliable way to detect a processor hog process, > unless you running CPU watcher and gather statistics on CPU > consumption rates. > Stopping a process which was running just before current one is like > shooting in the clear sky in hope that duck will teleport right on the > path of your bullet :) > > -- > Best regards, > Igor Stasenko AKA sig. >
