Hi,
I was looking for a way to 'lock' boinc to a task until it's finished before working on another task/application.
I don't find a way to do it with ver 6.6.36 on windows.
Could it be add to a new version, or is there a reason not to allow that ?
Thanks.

The basic reason is that some project, for example CPDN or Seti Astropulse WU can take 100+ hrs to complete. It makes no sense to run to completion before switching to a different project with short run times. Some project do a lot of work in the last few % or even after reaching 100%. It would be difficult if not impossible to maintain a mix of projects with varying resource share and ensuring that the work was done by due date. If projects where not switched on a regular basis then it would be difficult to test for WU with deadline problems.

I set my switch time to 3 hrs that way I know that Boinc will complete many project WU in 1 or 2 runs but still allow Boinc to detect any WU under deadline pressure

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Boinc V 7.4.36
Win7 i5 3.33G 4GB NVidia 470

Let me understand, are you saying BOINC does not regularly check if there are deadline contention issues for waiting to run/ready to start jobs, and not switch away? My observations are that BOINC will do exactly that, switch away to a job that has need of High Priority processing, checkpoint or no checkpoint, switch time or no switch time.

I'm in error, had a brain freeze, I believe V6 does do RR simulation on a regular basis. Some early V6.6 version were even too quick to switch task and rarely reached normal switch times.