Tcl Source Code

Nathan,

*I've created a new ticket, [ac7592e73c10d04b], for the idle queue starvation that Ashok provided an example of, and also fixed the issue by having tclIO.c/ChannelTimerProc() us the idle queue instead of the standard queue to reschedule itself.*

The following concerns come to mind with this change:

- Changing to the idle queue would seem to have similar effects to changing the SYNTHETIC_TIMER from 0 to a positive number. The comments for that #define specifically warn against that.

- Posting to the idle queue when other file events are posted to the event queue seems like it could lead to the reverse situation where your posted events are starved.

- Given that event processing in `Tcl_DoOneEvent` and its ilk allows filtering based on flags `TCL_FILE_EVENTS|TCL_TIMER_EVENTS|TCL_IDLE_EVENTS` this further confuses what those flags mean. Will your events fire in a TCL_FILE_EVENTS loop?

However, I am not going to spend time chasing the above when I believe the fundamental design itself is flawed, irrespective of whether you use the timer queue or the idle queue.