Only one CPU being detected?

Author	Message
Bishamon Send message Joined: 18 Jun 03 Posts: 7 Credit: 8,061,627 RAC: 0	Message 54197 - Posted: 15 Dec 2004, 14:11:53 UTC I'm running BOINC/SETI on three computers, all P4 processors with hyper-threading, and on one of the computers BOINC is only detecting a single processor and thus only working on one work unit at a time. It used to detect two, and as far as I can tell, nothing has changed on the system. I've tried re-running the benchmarks, rebooting the system, removing unnecessary processes, and still only one processor is being detected. Windows still shows two processors in Device Manager. I'm running WinXP Pro SP2 on a P4 2.4GHz/HT. The other two systems, another P2 2.4GHz/HT and a P4 2.6GHz/HT, are still running fine, with BOINC detecting two processors and crunching two work units at once. ID: 54197 ·

ChristianB Send message Joined: 11 Jul 01 Posts: 139 Credit: 90,213 RAC: 0	Message 54199 - Posted: 15 Dec 2004, 14:18:23 UTC Do you have the same OS on all 3 machines? Has it worked before? BOINC Doc \| Team-Site \| BOINC-Podcast ID: 54199 ·

Bishamon Send message Joined: 18 Jun 03 Posts: 7 Credit: 8,061,627 RAC: 0	Message 54211 - Posted: 15 Dec 2004, 15:45:14 UTC Yes, all three machines are running the same OS, and it has worked before. One of the working machines even has the same motherboard as the one that isn't working. ID: 54211 ·

STE\/E Volunteer tester Send message Joined: 29 Mar 03 Posts: 1137 Credit: 5,334,063 RAC: 0	Message 54216 - Posted: 15 Dec 2004, 15:55:39 UTC Last modified: 15 Dec 2004, 16:13:09 UTC Do you have your preferences set to use 2 processors ... ??? You may have to just un-install BOINC & re-install it, don't Detach or Reset the Project though & your WU's will be saved ... ID: 54216 ·

Bishamon Send message Joined: 18 Jun 03 Posts: 7 Credit: 8,061,627 RAC: 0	Message 54239 - Posted: 15 Dec 2004, 17:02:41 UTC I just tried un-instaling BOINC and then re-installing it, and running the benchmarks again, and it still says "Number of CPUs: 1". sigh ID: 54239 ·

ric Volunteer tester Send message Joined: 16 Jun 03 Posts: 482 Credit: 666,047 RAC: 0	Message 54247 - Posted: 15 Dec 2004, 17:42:34 UTC - in response to Message 54239. > I just tried un-instaling BOINC and then re-installing it, and running the > benchmarks again, and it still says "Number of CPUs: 1". sigh When you open the taskmanager, is it showing 1 physical and 2 logical CPUs? If not, verify in the PC setup (Bootphase-->setup) if the HT mode is "enabled". goodluck! ID: 54247 ·

Bishamon Send message Joined: 18 Jun 03 Posts: 7 Credit: 8,061,627 RAC: 0	Message 54254 - Posted: 15 Dec 2004, 18:20:18 UTC Task Manager is only showing one CPU, but Device Manager shows two. HT is enabled in the system BIOS. ID: 54254 ·

Thierry Van Driessche Volunteer tester Send message Joined: 20 Aug 02 Posts: 3083 Credit: 150,096 RAC: 0	Message 54257 - Posted: 15 Dec 2004, 18:36:34 UTC What are your settings in "Your account" "On multiprocessors, use at most xx processors"? Is it still set at 2 processors? ID: 54257 ·

Rom Walton (BOINC) Volunteer tester Send message Joined: 28 Apr 00 Posts: 579 Credit: 130,733 RAC: 0	Message 54260 - Posted: 15 Dec 2004, 18:46:51 UTC It sounds as though you installed the second processor after the OS was installed. If task manager only shows one processor, then that means Windows is only reporting one processor to the applications. You'll need to install Windows again to pick up the additional processor. If you throw in a Windows XP CD and tell it you want to upgrade your Windows installation, it'll setup the second processor after it completes. ----- Rom BOINC Development Team, U.C. Berkeley My Blog ID: 54260 ·

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