SMP on Compaq DL380

[Andre Guibert de Bruet]

On Sat, 23 Apr 2005, Matthew Sullivan wrote:
> Andre Guibert de Bruet wrote:
>> On Sat, 23 Apr 2005, Matthew Sullivan wrote:
>>> Andre Guibert de Bruet wrote:
>>>> On Thu, 21 Apr 2005, Matthew Sullivan wrote:
>>>> 
>>>>> I've been reading about problems with HP/Compaq's regarding launching of 
>>>>> second CPUs on SMP systems.
>>>>> 
>>>>> I've been through the BIOS settings and there seems to be no settings to 
>>>>> change the APCI table etc....
>>>>> 
>>>>> Now one thing that does seem common, when I have BIOS's with MP table 
>>>>> version set to 1.4 FreeBSD doesn't report the second CPU being launched 
>>>>> (even though it is seen in the acpidump)....  When I set the BIOS to 
>>>>> version 1.2 of the MP table the second CPU is reported and launched.
>>>>> 
>>>>> Now the Compaq DL380's I have done seem to have the ability to set 1.4 
>>>>> or 1.2 of the table ... mptable reports 1.4... (below)
>>>>> 
>>>>> Any suggestions on how to launch the second CPU...?
>>>> 
>>>> Make a boot -v from this machine available.
>>> 
>>> http://scorpion.sorbs.net/dmesg.txt
>> 
>> The lack of the following seems to indicate that you do not have "device 
>> apic" enabled in your kernel config (You need "options SMP" as well to get 
>> FreeBSD to do more than just recognize both CPUs):
>> 
>> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
>>  cpu0 (BSP): APIC ID:  0
>>  cpu1 (AP): APIC ID:  <some number>
>> 
>> Please share your config and the steps that you are taking to build your 
>> kernel.
>
> /usr/src/sys/i386/conf/SCORPION has been copied to:
> http://scorpion.sorbs.net/SCORPION
>
> /etc/make.conf contains 'KERNCONF=SCORPION'
> then I follow the instructions in the Makefile....
>
> cd /usr/src
> make buildworld
> make buildkernel
> make installkernel
> reboot
> mergemaster -p
> make installworld
> mergemaster
> reboot
>
> (before I read the man page for make.conf I was using KERNCONF=SCORPION in 
> the appropriate places on the command line)

The dmesg shows that you compiled the kernel using this config file 
anyway. All is good so far.

Processors:     APIC ID Version State           Family  Model   Step    Flags
 		0       0x10    BSP, usable     6       2       1       0x0381
 		0       0x10    AP, usable      6       8       6       0x383fbff

The APIC IDs here are the same. The flags on the would-be AP are what I 
would expect for a recent i686. The BSP barely qualify it to be a gen-1 
Pentium. I wouldn't trust any of the values being reported. Could you 
obtain the real identity of these CPUs and confirm that they're not 
mismatched? The easy way of doing this if your BIOS doesn't post this 
information is using a Knoppix LiveCD and doing a cat /proc/cpuinfo.

If both CPUs are reporting the same ID, I can see how we're not launching 
the second proc; We assume that ID 0 is the BSP and additional processors 
have different APIC IDs. Is something really borked here? Yep!

Andy

| Andre Guibert de Bruet | Enterprise Software Consultant >
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