Date: Wed, 24 Jan 2018 10:18:53 -0500 From: Mike Tancsa <mike@sentex.net> To: Nimrod Levy <nimrodl@gmail.com> Cc: Mark Millard <marklmi26-fbsd@yahoo.com>, michaelp@bsquare.com, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: Ryzen issues on FreeBSD ? (summary of 4 issues) Message-ID: <5d13e877-88d9-30a3-3ec1-0824f48a9a64@sentex.net> In-Reply-To: <CAMgUhprGmjHQJD2_yjsCTy=N50bs42e3kDKBOtAj7SkcEiMQnQ@mail.gmail.com> References: <A6A50EB1-6944-40B4-9F33-002336F582E6@yahoo.com> <744bbe18-80c4-d057-c88d-fbe480ee9abb@sentex.net> <CAMgUhprGmjHQJD2_yjsCTy=N50bs42e3kDKBOtAj7SkcEiMQnQ@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 1/24/2018 10:07 AM, Nimrod Levy wrote: > I'm not sure this is characterized quite right. I've been seeing c) > where the system freezes completely and seems to be related to idle/ low > load, but the workaround that seems to be working around the issue is > part of a) where I lowered the memory speed. It did seem to reduce the frequencies of the lockups, but I still had at least one with the RAM speed reduced. I want to rule out b) from all this with replacement CPUs so will revisit in a week. ---Mike > > > On Wed, Jan 24, 2018 at 9:42 AM Mike Tancsa <mike@sentex.net > <mailto:mike@sentex.net>> wrote: > > I think perhaps a good time to summarize as a few issues seem to be > going on > > a) fragile BIOS settings. There seems to be a number of issues around > RAM speeds and disabled C-STATES that impact stability. Specifically, > lowering the default frequency from 2400 to 2133 seems to help some > users with crashes / lockups under heavy loads. > > b) CPUs manufactured prior to week 25 (some say week 33?) have a > hardware defect that manifests itself as segfaults in heavy compiles. I > was able to confirm this on 1 of the CPUs I had using a Linux setup. It > seems to confirm this, you need to physically look at the CPU for the > manufacturing date :( Not sure how to trigger it on FreeBSD reliably, > but there is a github project I used to verify on Linux > (https://github.com/suaefar/ryzen-test) > > c) The idle lockup bug. This *seems* to be confirmed on Linux as well > http://blog.programster.org/ubuntu-16-04-compile-custom-kernel-for-ryzen > and > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690085 > > d) Compile failures of some ports. For myself and one other user, > compiling net/samba47 reliably hangs in roughly the same place. Its not > clear if this is related to any of the above bugs or not. > > Right now I have RMA'd my 3 CPUs back to AMD. Hopefully, I will get > replacements in a week and can get back to testing c) and d). > > ---Mike > > -- > > -- > Nimrod > -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5d13e877-88d9-30a3-3ec1-0824f48a9a64>