Wenguo, I installed ganglia on one of our single processor xeon machines. When I updated the page for the cluster the cpu count only increased by 2 cpus. The page for that machine lists the machine as having only 2 processors, not 4.
I would recommend looking at /proc/cpuinfo if you are running linux. We see that each physical processor shows up as two logical processors that share the same physical id and runqueue number. Ian PS. I am not a professor :) Wenguo WEI wrote: > Dear Prof. Ian Cunningham, > > Yes, we have some nodes which are enabled hyperthreading, but not all. > But at the ganglia web interface we see every nodes have 4 CPU, some > nodes only have 1 CPU when we use top command. > > Any suggestions? > > With Best Regards > > Yours > > Wenguo WEI > > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > > -----邮件原件----- > *发件人:* [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] *代表 *Ian Cunningham > *发送时间:* 2004年8月2日 22:19 > *收件人:* Wenguo WEI > *抄送:* [email protected] > *主题:* Re: [Ganglia-general] Why gmond report multi-CPU when nodes > have only ONE CPU? > > Wenguo, > > I would guess that the reason that the nodes report too many cpu's is > because they are intel chips with hyperthreading. When hyperthreading > is enabled from the bios, each CPU shows up as two CPUs to the OS. If > you look at the command top, you will see that the computer thinks it > has twice as many CPUs as you think it has. > > http://www.intel.com/technology/hyperthread/ > > Ian > > Wenguo WEI wrote: > > Hi, all , > > We have installed ganglia at IBM xseries 335 Cluster, some machines > have 2 CPU, but others have only ONE CPU, why gmond report every nodes > have 4 CPU? > > Thanks in advance for any tips/help/suggestions. > > With Best Regards > > Yours > > Wenguo WEI > > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> >
