No complaints from me and thank you for the work done and the testing.
- Melanie
On 15/07/2014 02:17, Justin Clark-Casey wrote:
> Hi folks. The current method of terminating script threads that do not exit
> an event in a timely manner is to abort
> their threads in the VM.
>
> However, in some cases this can leave the VM unstable, with symptoms such as
> simulator crash with native stack trace or
> a leap up to 100% CPU use for no apparent reason. I experienced these
> problems myself.
>
> In response, almost a year and a half ago [1], I implemented an alternative
> method of script stop ("co-op") that relies
> on checks inserted at script compile time. No changes at the LSL level are
> required. With this method, the compiled
> script will always realize that it needs to stop and so no aborts are needed.
>
> I have used co-op extensively over the last year and a half as have others
> (e.g. it's used on at least some OSGrid
> Plazas) without incident and with apparent increased stability.
>
> It hasn't been default before now because changing to co-op required the user
> to manually clear their compiled DLL cache
> or set DeleteScriptsOnStartup = true for one simulator session. This seems
> trivial but I felt it would be too
> disruptive to people who upgrade at release time.
>
> However, as of git master d7b92604 (11th July 2014), I've implemented a
> mechanism that will automatically recompile the
> scripts as necessary and use the new ones on the next simulator restart.
> Switching the ScriptStopStrategy should now
> require no further user intervention.
>
> I've written the details of this up at [2]. Note that switching the stop
> strategy does not have any impact on saved
> script variables or other state - scripts will behave as they did before.
>
> Hence, I now want to switch the default script stop strategy to co-op. If
> anybody does want to continue using "abort"
> for any reason, then this can be done by setting ScriptStopStrategy = abort
> in the [XEngine] section of OpenSim.ini.
>
> Please let me know if there are any questions or concerns about this.
>
> [1] http://opensimulator.org/pipermail/opensim-dev/2013-January/023985.html
> [2] http://opensimulator.org/wiki/XEngine#ScriptStopStrategy
>
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