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Date:      Mon, 12 Feb 2018 20:48:56 -0500
From:      Mike Tancsa <mike@sentex.net>
To:        Don Lewis <truckman@FreeBSD.org>, Eugene Grosbein <eugen@grosbein.net>
Cc:        freebsd-stable@freebsd.org, Peter Moody <freebsd@hda3.com>, Andriy Gapon <avg@freebsd.org>, Pete French <petefrench@ingresso.co.uk>
Subject:   Re: Ryzen issues on FreeBSD ? (with sort of workaround)
Message-ID:  <73f83421-97ed-88f8-08be-39cf5a70ed20@sentex.net>
In-Reply-To: <tkrat.7fad2b76b85bc4b1@FreeBSD.org>
References:  <8e842dec-ade7-37d1-6bd8-856ea1a827ca@sentex.net> <a601973f-9205-8dd9-7f78-a7f03985ab4a@sentex.net> <CAMgUhpop3=J7TQimK2iHdGTc=hnTgCEZDqibDSRCyTPMWX5wJQ@mail.gmail.com> <CAMgUhpop54hJ%2Biq_VYYqrEHgSapmMu_GmOPaOsmhA=QbjPEZ5A@mail.gmail.com> <CADbMJxk=HDoMsPghDrkTNqsC_XZo28nYPNGC%2BD9fddENPiiFng@mail.gmail.com> <730eb882-1c6a-afb7-0ada-396db44fb34b@ingresso.co.uk> <tkrat.8fa97919286143d7@FreeBSD.org> <8b882970-4d5d-2a96-4dac-779cab07b9ae@sentex.net> <CADbMJxkRR8s1=WWXP%2BH9eOHv_UWMQrUR=_E4aFw91VCeep82pw@mail.gmail.com> <343acf99-3e9e-093a-7390-c142396c2985@sentex.net> <tkrat.975666e9f483a6a0@FreeBSD.org> <3dd9a61b-511d-db2e-80ca-cbc9a4b65f92@sentex.net> <tkrat.ada77e0420783bed@FreeBSD.org> <55913e41-3a8a-9a4d-6862-e09a3d0f4d55@sentex.net> <tkrat.e541d1b83f4f6c75@FreeBSD.org> <5e48bbc2-e872-46bd-eece-25acbb180f77@sentex.net> <c0319297-d47d-449d-a6f1-2529d1d38541@sentex.net> <5A71C5AE.6020202@grosbein.net> <tkrat.7fad2b76b85bc4b1@FreeBSD.org>

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On 2/12/2018 4:49 PM, Don Lewis wrote:
> On 31 Jan, Eugene Grosbein wrote:
>> 31.01.2018 4:36, Mike Tancsa пишет:
>>> On 1/30/2018 2:51 PM, Mike Tancsa wrote:
>>>>
>>>> And sadly, I am still able to hang the compile in about the same place.
>>>> However, if I set
>>>
>>>
>>> OK, here is a sort of work around. If I have the box a little more busy,
>>> I can avoid whatever deadlock is going on.  In another console I have
>>> cat /dev/urandom | sha256
>>> running while the build runs
>>>
>>> ... and I can compile net/samba47 from scratch without the compile
>>> hanging.  This problem also happens on HEAD from today.  Should I start
>>> a new thread on freebsd-current ? Or just file a bug report ?
>>> The compile worked 4/4
>>
>> That's really strange. Could you try to do "sysctl kern.eventtimer.periodic=1"
>> and re-do the test without extra load?
> 
> I'm having really good luck with the kernel patch attached to this
> message:
> https://docs.freebsd.org/cgi/getmsg.cgi?fetch=417183+0+archive/2018/freebsd-hackers/20180211.freebsd-hackers
> 
> Since applying that patch, I did three poudriere runs to build the set
> of ~1700 ports that I use.  Other than one gmake-related build runaway
> that I've also seen on my AMD FX-8320E, I didn't see any random port
> build failures.  When I was last did some testing a few weeks ago,
> lang/go would almost always fail.  I also would seem random build
> failures in lang/guile or finance/gnucash (which uses guile during its
> build) on both my Ryzen and FX-8320E machines, but those built cleanly
> all three times.
> 
> I even built samba 16 times in a row without a hang.
> 


Cool!  I will give it a try!

In other news, the latest BIOS patch from ASUS for my motherboard
*seems* to have fixed the random hangs.  In the BIOS, I had to dial down
the memory one notch, disable q-states and disable core boost for my non
X Ryzen CPUs.  I did that Friday, and running a load that would
typically lock up the box, survived the weekend.  Same with the box I
have in Zoo.  No random freeze ups.

I was also able to take the amdtemp and amdsmn code from HEAD and
compile it on STABLE to confirm the CPU is / was not overheating.  Peak
temp in the low 50s even with the CPU cores are all maxed out.

	---Mike

-- 
-------------------
Mike Tancsa, tel +1 519 651 3400 x203
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada



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