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Date:      Tue, 4 Jan 2022 19:20:08 -0500
From:      mike tancsa <mike@sentex.net>
To:        freebsd-current@freebsd.org
Subject:   Re: observations on Ryzen 5xxx (Zen 3) processors
Message-ID:  <78385fb2-adf1-3385-7ecf-2587befb0abc@sentex.net>
In-Reply-To: <YdR8Jwq7AZrJ4jgz@ceres.zyxst.net>
References:  <cc1dd541-81fc-b56a-81ca-da76d20a095b@FreeBSD.org> <YdRUcz0kbVDtWXTv@ceres.zyxst.net> <YdR8Jwq7AZrJ4jgz@ceres.zyxst.net>

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On 1/4/2022 11:56 AM, tech-lists wrote:
> On Tue, Jan 04, 2022 at 02:06:43PM +0000, tech-lists wrote:
>> Hello,
>>
>> On Wed, Dec 22, 2021 at 02:42:48PM +0200, Andriy Gapon wrote:
>>>
>>> There have been some reports on strange / unexpected things with 
>>> Ryzen 5xxx
>>> processors.  I think I have seen 5950X, 5900X and 5800X mentioned, 
>>> not sure
>>> about others.
>>
>> Thanks for this. I'm evaluating a ryzen 5600G. Here's hwinfo:
>>
>> https://bsd-hardware.info/?probe=e67007df20
>>
>> I've noticed a couple of oddities:
>>
>> 1. some ports won't build, but world builds and installs just fine 
>> (current/14)
>
> Can't build lang/perl5.32. I have many vms running perl5.32 and 
> they're not seeing any issues.
> There's nothing in bugs suggesting there's an issue with this port 
> right now.
>
I would for sure try a clean src.conf first and use that as a baseline.  
Also, someome mentioned trying

machdep.idle=spin

In /boot/loader.conf

But removing your src.conf optimizations would be the first place to try

     ---Mike




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