On Wed, Mar 18, 2020 at 02:02:08PM -0700, Gregory Nowak wrote: > On Wed, Mar 18, 2020 at 06:24:27PM +0100, Antony Stone wrote: > > Does anyone here have experience of running Devuan on AMD Ryzen CPUs?
Similar results on 2990WX (a gen older). With systemd, there's a hard power-off (with a nasty screech from the fan) somewhere late during boot. Not a squeal on serial, _usually_ physical poweroff (G3 not G2) helps but after a case it didn't help I'm not digging harder. Without systemd, everything works perfectly, including any tests I could think of. > > I'm just planning to get a new PC, and I've generally preferred AMD to > > Intel, High core-count AMDs _suck_. They have so poor memory and chiplet-to-chiplet bandwidth that in most loads I tried a much smaller Intel beats them easily. For example, a simple multithreaded task: * 64 threads: 12000 seconds * 16 threads (numactl -N 0): 9000 seconds * a 6700K Skylake: 1200 seconds * a 2*56-thread server, -N 0: somewhere near geometric average of the two above (Disclaimer: I work at one of these companies, and that's not AMD.) > > so just wondering whether there's anything I need to look out for with > > pretty > > much the latest hardware. > > Yes: > > 1. Upgrade your kernel to 4.10 or later. If you install the kernel > from Beowulf-backports, that should be good enough. For me, even with 5.6-rc6 doesn't make the problem disappear. Thus, it's possible there are _multiple_ bugs in systemd where it pokes into places it shouldn't poke into. Meow! -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ in the beginning was the boot and root floppies and they were good. ⢿⡄⠘⠷⠚⠋⠀ -- <willmore> on #linux-sunxi ⠈⠳⣄⠀⠀⠀⠀ _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng