Date: Sun, 3 Jun 2018 13:49:51 -0400 From: Mike Tancsa <mike@sentex.net> To: Pete French <petefrench@ingresso.co.uk>, Don Lewis <truckman@FreeBSD.org> Cc: eric@vangyzen.net, freebsd-stable@freebsd.org, freebsd@hda3.com, avg@freebsd.org Subject: Re: Ryzen issues on FreeBSD ? (with sort of workaround) Message-ID: <2a54be25-f845-e493-37e7-403247383e9e@sentex.net> In-Reply-To: <0e8b197f-15b2-b865-b532-cee2a20f2b42@ingresso.co.uk> References: <tkrat.e96200e0b688ca3c@FreeBSD.org> <E1fP2HW-000HG4-KR@dilbert.ingresso.co.uk> <tkrat.5527722618de87c7@FreeBSD.org> <d32a66f4-2795-831e-6f4d-8d299ebfdbea@sentex.net> <0e8b197f-15b2-b865-b532-cee2a20f2b42@ingresso.co.uk>
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On 6/3/2018 1:10 PM, Pete French wrote: > >> The compile bug has been fixed for me. However, last I checked I can >> still freeze a system by generating a lot of network traffic between VMs >> in either bhyve or virtbox. Its been a while since I tested (couple of >> months) but I dont recall anything obviously committed that highlighted >> that issue. Note this is on Epyc and Ryzen boxes > > Yes, it was your iperf3 tests which enable me to freeze the system with > SMP enabled. With SMP disabled it works fine, however. have you tried > that at all ? The only other settings I ahve are the global C-states > and cool-n-quiet being disabled. I dont really care about either so > havent tested re-enabling them. I have c-states disabled on the ryzen both for FreeBSD and Linux. To disable SMP on the Epyc doesnt seem to be possible. But then again kill off 31 cores is a heavy cost to pay for stability :( When I am back at the office, I will see if a recent checkout of HEAD still freezes the Epyc. ---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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