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тАО05-07-2007 11:41 PM
тАО05-07-2007 11:41 PM
RedHat 4.4 on DL380 G4 detects only one CPU
We noticed that the kernel detects only one CPU out of two physical CPU's.
/proc/cpuinfo shows just one (1), while dmidecode and the BIOS screens at startup show that there are two (2) CPU's.
Basically, all this shows me that the kernel fails to detect the second CPU, and that the BIOS detects both.
So - what now? how do I make the kernel realize that there are two?
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тАО05-07-2007 11:43 PM
тАО05-07-2007 11:43 PM
Re: RedHat 4.4 on DL380 G4 detects only one CPU
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тАО05-09-2007 04:36 AM
тАО05-09-2007 04:36 AM
Re: RedHat 4.4 on DL380 G4 detects only one CPU
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тАО05-09-2007 04:51 AM
тАО05-09-2007 04:51 AM
Re: RedHat 4.4 on DL380 G4 detects only one CPU
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тАО05-09-2007 06:32 AM
тАО05-09-2007 06:32 AM
Re: RedHat 4.4 on DL380 G4 detects only one CPU
Could actually be a bad CPU.
Ideas:
1) Make sure hyperthreading is enabled in the BIOS.
2) Change OS type back to default.
3) Run hardware diagnostics from the bootable GL380 CD. Update the firmware while you are at it.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО05-09-2007 05:32 PM
тАО05-09-2007 05:32 PM
Re: RedHat 4.4 on DL380 G4 detects only one CPU
Here are some more bits of info:
Mike - There are two physical CPU's - I've checked that personally by opening the chassis.... so it can't be hyperthreading. Furthermore, the dmidecode info shows two distinct ID's, and with hyperthreading you get one ID only.
Steven - Both CPU's work fine when inserted in slot 1. So I don't think they're defective.
However, I will check the rest of your suggestions - have to say I'm not sure what you mean by "Ensure that the OS type is correctly selected" (Mike), but it sounds like a good idea :-)
and if anyone has more ideas I'm still looking for them. If these suggestions don't work I might have to shut the server down and try a fresh install - I really don't want to do that.
I might even have to try Windows (Gah...)
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тАО05-12-2007 01:04 AM
тАО05-12-2007 01:04 AM
Re: RedHat 4.4 on DL380 G4 detects only one CPU
Have you tried any other releases on this system? Perhaps boot a Knoppix CD and see if you get 2 penguins right from the start? Perhaps an alternate SMP kernel in 4.4 (hugemem, etc)?
Don