Date: Thu, 14 Jun 2018 10:24:17 -0400 From: Mike Tancsa <mike@sentex.net> To: Eric van Gyzen <eric@vangyzen.net>, Konstantin Belousov <kostikbel@gmail.com>, current@freebsd.org Subject: Re: Ryzen public erratas Message-ID: <402ba93e-4930-4237-dd53-d20a24b317e3@sentex.net> In-Reply-To: <231dda70-6383-9d5c-d6c3-98e1c784f505@vangyzen.net> References: <20180613103535.GP2493@kib.kiev.ua> <231dda70-6383-9d5c-d6c3-98e1c784f505@vangyzen.net>
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On 6/14/2018 9:36 AM, Eric van Gyzen wrote: > On 06/13/2018 05:35, Konstantin Belousov wrote: >> Today I noted that AMD published the public errata document for Ryzens, >> https://developer.amd.com/wp-content/resources/55449_1.12.pdf >> >> Some of the issues listed there looks quite relevant to the potential >> hangs that some people still experience with the machines. I wrote >> a script which should apply the recommended workarounds to the erratas >> that I find interesting. >> >> To run it, kldload cpuctl, then apply the latest firmware update to your >> CPU, then run the following shell script. Comments indicate the errata >> number for the workarounds. >> >> Please report the results. If the script helps, I will code the kernel >> change to apply the workarounds. > Kostik: This thread on the -stable list has a lot of positive feedback: > > https://lists.freebsd.org/pipermail/freebsd-stable/2018-June/089110.html I have a couple of Epyc boxes that showed the same lockup behaviour. I will re-install FreeBSD on them and see if their microcode updates fix this issue as well... Should I run the same cpuctl commands on those CPUs ? BTW, I am happy to loan one out to you in the FreeBSD netperf cluster for a few weeks ---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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