Date: Sun, 21 Jan 2018 16:52:36 -0800 (PST) From: Don Lewis <truckman@FreeBSD.org> To: Peter Moody <freebsd@hda3.com> Cc: Nimrod Levy <nimrodl@gmail.com>, freebsd-stable@freebsd.org, Ryan Root <rroot@rootautomation.com> Subject: Re: Ryzen issues on FreeBSD ? Message-ID: <tkrat.190c8786d5e52cee@FreeBSD.org> In-Reply-To: <CADbMJxk=HDoMsPghDrkTNqsC_XZo28nYPNGC%2BD9fddENPiiFng@mail.gmail.com> References: <8e842dec-ade7-37d1-6bd8-856ea1a827ca@sentex.net> <3b625072-dfb3-6b4f-494d-7fe1b2fa554c@ingresso.co.uk> <2c6ce4dd-f43c-7c40-abc2-732d6f8996ec@sentex.net> <tkrat.6d8f44d87e74fa14@FreeBSD.org> <795dbb79-3c18-d967-98b9-5d09a740dbfe@sentex.net> <CAMgUhpr%2B5HeBi1MRegs=XoKpdHW8-i%2Bec0k-DNaL_pcN6PCPKw@mail.gmail.com> <tkrat.5ec856810e0c7ced@FreeBSD.org> <CAMgUhpqZyCOjqVhMCAi-b_JaKYtyfqDf0pOcX0LwV2dcTuusyg@mail.gmail.com> <CAMgUhpqpYpoi1bD9h_SYvh83g_Csky%2BqMkTsOYZ1zcHYxtMeHg@mail.gmail.com> <dd29d77a-deb9-423e-f9b8-cb07387bbfd5@sentex.net> <9b769e4e-b098-b294-0bce-8bb1c42e8a59@rootautomation.com> <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>
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On 21 Jan, Peter Moody wrote: > hm, so i've got nearly 3 days of uptime with smt disabled. > unfortunately this means that my otherwise '12' cores is actually only > '6'. I'm also getting occasional segfaults compiling go programs. Both my original and replacement CPUs croak on go, so I don't think an RMA is likely to help with that. Go is a heavy user of threads and my suspicion is that there is some sort of issue with the locking that is uses. I'm guessing a memory barrier issue of some sort ...
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