Cant remember for the life of me
Compaq Proliant 5500 server, when you add CPU's do you have to "tell it?"
Gone from a single to quad CPU and can only get CentOS to report back on CPU
0(and yes it is an SMP kernel)
Cheers
Si
First of all, check that it is!
Also, make sure the CPUs match, including the "stepping", mostly that has to match, IIRC it's sort of a release version of the CPU. Speeds need to match too, although I had a 400MHz and three 300MHz processors in one machine at once, all running at 300MHz.
Last time I used a Proliant (I dumped them all, too noisy for my home office) it reported the number of CPUs at start up, are you able to see them there?
Also try another distro, download knoppix or similarly CD-booting distro and see what it says.
: > (and yes it is an SMP kernel) : : First of all, check that it is!
It is, I compiled it myself
: Also, make sure the CPUs match, including the "stepping", mostly that : has to match, IIRC it's sort of a release version of the CPU. Speeds : need to match too, although I had a 400MHz and three 300MHz processors : in one machine at once, all running at 300MHz.
Yep, four Xeons @ 450Mhz, carefully matched.
: Last time I used a Proliant (I dumped them all, too noisy for my home : office) it reported the number of CPUs at start up, are you able to : see them there?
Tell me about it - at least this one lives with the other compaqs in the garage ;-) Yep, says four CPU's initialised there.
: Also try another distro, download knoppix or similarly CD-booting : distro and see what it says.
Good idea - ah, means I have to tilt the server over again (the CD drive is bolloxed and I cant be arsed to battle to change it right now - plus SWMBO will kill me if i move it!)
Cheers Ian
Hmm, wonder if its worth starting over with 4 CPU's at the install?
Si
yep - I have that prob too - they tell me I'm at a 'difficult' age.
Last Compaq I upgraded to two CPUs needed an additional power module too.
oh buggritt - that's was gonna be my next suggestion.
What does the bios 'see'? Have you tried running up another o/s?
Nah, linux does what you tell it. You just have to tell it the right thing ;-)
Check that you're booting into the kernel that you compiled, and also check boot parameters to make sure there's no SMP-disabling flags on the command line.
Also check how you are checking, try "cat /proc/cpuinfo" or "ls /sys/devices/system/cpu" and check syslog and dmesg output, I can't recall what syslog or dmesg say, my SMP machines have been up for too long for the last reboot messages to be stored.
Finally your distro might be buggering you around, check for distro-specific SMP enabling/disabling, some have stuff in the boot script that you have to change.
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