Re: MULTIPROCESSOR enabled by default on all Alpha kernels

[Jason Thorpe <thorpej%me.com@localhost>]

I’m willing to help resolve any bugs you uncover!

-- thorpej
Sent from my iPhone.

> On Sep 20, 2020, at 12:51 PM, Dustin Marquess <dmarquess%gmail.com@localhost> wrote:
> 
> 
> My only SMP Alpha is a CS20 running DS20L firmware. I know there were issues at one time with the built-in NIC and SCSI controllers. Did those ever get resolved? If so, I’ll get it racked and powered up.
> 
> I had swapped the SCSI controller out with one for a DS20L to run Tru64 on it at one time, but I still have the original (if I remember correctly, NetBSD didn’t like the DS20L one). I know one was Adaptec, I forget what the other one was.
> 
> -Dustin
>> On Sep 19, 2020, 11:53 AM -0500, Jason Thorpe <thorpej%me.com@localhost>, wrote:
>> 
>> 
>>> On Sep 19, 2020, at 9:39 AM, Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost> wrote:
>>> 
>>>> The system has been very stable for me, and is feeling much snappier.
>>> 
>>> I'm afraid if timecounter(9) using multiple PCC processor clocks
>>> works properly.
>> 
>> Yes, I think there are some known issues. Taylor (CC'd) also had some thoughts on it?
>> 
>>> 
>>> I've committed it back in 2007 to switch alpha port to MI timecounter(9),
>>> https://mail-index.netbsd.org/source-changes/2007/07/21/0012.html
>>> https://mail-index.netbsd.org/source-changes/2007/07/21/0013.html
>>> but IIRC ad@ pointed out that x86 TSC implementation (that alpha's
>>> PCC implementation was based on) was problematic.
>>> 
>>> There was also a report that sleep(1) or TOD etc. didn't work
>>> as expected if timecounter(9) was pcc (and worked fine with
>>> clockinterrupt).
>>> 
>>> ---
>>> Izumi Tsutsui
>> 
>> -- thorpej
>>