Hi, I have been running 4 tasks at a time until recently. Now, my computer is running only 2 at a time. I had been on Seti@home and Einstein@home. I recently added Rosetta@home, then World community grid. When I added World Community grid, I had to download their BOINC manager.

Does anyone have an idea how I can get back to running 4 tasks at a time or what to check or tweak?

GenuineIntel
Intel(R) Core(TM) i3 CPU M 350 @ 2.27GHz [Family 6 Model 37 Stepping 2]
(2 processors)

Thanks!

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When I added World Community grid, I had to download their BOINC manager.

A common misconception, but this is not necessary. You can just ADD WCG to an existing BOINC, it's a normal option from the Tools->Add a project drop down menu.

Only when you go by their web site and click the "Join today" button, do you get the option to download their version of the BOINC client. But as said, it isn't a requirement to add and run WCG.

As for your actual problem:

Does anyone have an idea how I can get back to running 4 tasks at a time or what to check or tweak?

This CPU does do hyper-threading (HT). This is a function of the CPU, not something that BOINC does. You will have to enable a setting in the BIOS to be able to use HT.

1. Check in Windows Task Manager->Performance tab how many CPU usage History boxes you see. If only two, then hyper-threading is no longer set to on, and you'll have to re-enable that from the computer's BIOS.

2. When there are 4 boxes showing in the check above, then hyper-threading is on. In this case check in BOINC how many CPUs it is allowed to use. Do so in both the online computing preferences and the local preferences, depending on which ones you use. The setting to check for is "On multiprocessors use at most
X% of the processors", which should be set to 100%. In the online computing preferences, there is also another setting saying "On multiprocessors, use at most X processors", this is the minimum setting and for you it should be set to 2.

3. Is there actually enough work in cache to run 4 at the same time, or is there work running in high priority, thereby preventing BOINC from getting further work from other projects? As it doesn't make sense to BOINC to get more work, if the science applications can't finish the present work before the deadline anyway.

Check in Advanced view->Tasks tab. Make sure to click the "Show all tasks" button as else you only see the running tasks.

When completely in doubt, please exit BOINC fully and restart it (Start->All Programs->BOINC->BOINC Manager). Next post its start up messages. Advanced view->CTRL+SHIFT+E to open the Event Log, copy all messages, and post them here.

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Thank you! I now have 4 running again. Somehow, I only showed 3G instead of 4G RAM. I updated to the latest BIOS as it was overdue anyway. I also unchecked MAX memory in the advanced options of boot section in the system configuration. I remembered I had checked that off the other day. I hadn't rebooted in a while and when I did it took effect. All is good.