SMP support for XLR processors.

[Randall Stewart]

Rui:

I don't see this at all either... hmm I wonder why..

I am getting up and running (thanks JC)..

I will launch a buildworld -j16 before heading to work ;-)

R
On Apr 20, 2010, at 3:33 AM, Rui Paulo wrote:

> On 20 Apr 2010, at 11:05, Rui Paulo wrote:
>
>> On 20 Apr 2010, at 10:52, C. Jayachandran wrote:
>>
>>> On Mon, Apr 19, 2010 at 7:27 PM, C. Jayachandran
>>> <c.jayachandran at gmail.com> wrote:
>>>> I have a possible cause for the panic with invariants - we should  
>>>> not
>>>> schedule the msgring threads unless the smp is completely up. I  
>>>> guess
>>>> we start getting message ring interrupts on before the message ring
>>>> threads can be scheduled.  I am trying out some changes for this -
>>>> will send you a patch if this fixes it.
>>>
>>> I've attached a patch that should fix the issue. The cause was the  
>>> way
>>> message ring threads are started on individual cores and the way
>>> interrupts are enabled in the core.  I've moved starting message  
>>> ring
>>> threads on other cpus to be a SYSINIT after SMP is started.  I'd
>>> thought originally that it was due to some clash with the changes in
>>> HEAD - but looks like I was completely off-track there.
>>>
>>> Please let me know if you don't get multi-user with 32 cpus with  
>>> this
>>> patch. There is still the original hang in buildworld, but that  
>>> should
>>> be a bug elsewhere
>>>
>>> I have a copy at http://sites.google.com/site/cjayachandran/files  
>>> too
>>
>> This works perfectly, thanks!
>
> On further inspection, I noticed that the load avg is now 7.
>
> last pid:  1613;  load averages:  6.99,  6.97,  6.08    up  
> 0+00:30:11  10:32:48
> 108 processes: 40 running, 24 sleeping, 44 waiting
> CPU:  0.0% user,  0.0% nice, 21.9% system,  0.0% interrupt, 78.1% idle
> Mem: 8444K Active, 6028K Inact, 37M Wired, 308K Cache, 6800K Buf,  
> 3190M Free
> Swap:
>
>  PID USERNAME  THR PRI NICE   SIZE    RES STATE   C   TIME   WCPU  
> COMMAND
>   10 root       32 171 ki31     0G     0G CPU0    0 263:26 2500.00%  
> idle
>   17 root        1 -16    -     0K     0G CPU12   2   0:00 100.00%  
> msg_intr12
>   15 root        1 -16    -     0K     0G CPU4    2   0:00 100.00%  
> msg_intr4
>   16 root        1 -16    -     0K     0G CPU8    2   0:00 100.00%  
> msg_intr8
>   20 root        1 -16    -     0K     0G CPU24   1   0:00 100.00%  
> msg_intr24
>   19 root        1 -16    -     0K     0G CPU20   1   0:00 100.00%  
> msg_intr20
>   21 root        1 -16    -     0K     0G CPU28   1   0:00 100.00%  
> msg_intr28
>   18 root        1 -16    -     0K     0G CPU16   1   0:00 100.00%  
> msg_intr16
>
> What are these msg_intrXX kprocs doing?
>
> Regards,
> --
> Rui Paulo
>
>

------------------------------
Randall Stewart
803-317-4952 (cell)
803-345-0391(direct)