| Index | Recent Threads | Unanswered Threads | Who's Active | Guidelines | Search |
 |
World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: Not using all cores |
| No member browsing this thread |
|
Thread Status: Active Total posts in this thread: 5
|
|
| Author |
|
|
Randzo
Senior Cruncher Slovakia Joined: Jan 10, 2008 Post Count: 339 Status: Offline Project Badges: 
|
Hello my Boinc is not using all cores for computation.
I use Lucid Linx with all updates installed in latest version of Oracle Virtual Box Boinc installed previous week using apt-get install (so latest version I hope) Mon 15 Nov 2010 12:19:53 PM CET Processor: 8 GenuineIntel Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz [Family 6 Model 30 Stepping 5] Advanced -> Preferences-> Processor usage On multiprocessor systems use at most 100.00 % of the processors Use at most 100 % CPU time Activity ->run always Boinc is using only 4 cores for computation and in Task manager of Host operating system I can see that processor is running only on 50%. Any ideas how to make all cores woking? Thanks for help in advance, sorry if this question was already answered, or it is silly question. |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
It could be that VirtualBox is configured to use only 4 cores? I don't remember if VirtualBox manages HyperThreading correctly.
|
||
|
|
Randzo
Senior Cruncher Slovakia Joined: Jan 10, 2008 Post Count: 339 Status: Offline Project Badges:
|
VirtualBox is set to 8 cores.
You can even double number of physical cores, but the performance is poor and usability of this very low. And applications cannot see if the core is HT-ed or not, they just see number of cores. |
||
|
|
Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello Randzo,
On multiprocessors, at most use: 8 processors On multiprocessors, use: 100.0 % of processors Make sure that you are using the website profile rather than local preferences. You might want to post the startup Messages tab after a reboot. Lawrence |
||
|
|
Randzo
Senior Cruncher Slovakia Joined: Jan 10, 2008 Post Count: 339 Status: Offline Project Badges:
|
Hello thanks for reply.
----------------------------------------Web profile didn`t hepled. That virtual machine is traveling. The machine (with 8 HT cores) which really chrunches work units cannot be connected to the Internet. So I have to download work on other machine only with 2 cores. It was set to 4 cores and real machine chcrunched 4 WU. Than I set the download machine to 2 cores and real machine chcrunched only 2 WU. So the Boinc is not chcecking real number of Cores, eventhough it is written in Boinc messages. So the wokraround is: go to /var/lib/boinc-client/client_state.xml and correct X value in <p_ncpus>X</p_ncpus> by real number of Cores Thanks for your help anyway. Randzo [Edit 1 times, last edit by Randzo at Nov 25, 2010 6:10:27 PM] |
||
|
|
|