Date: Tue, 23 Mar 2021 10:11:46 +0100 From: Michael Gmelin <freebsd@grem.de> To: monochrome <monochrome@twcny.rr.com> Cc: freebsd-current@freebsd.org Subject: Re: freebsd 13 ryzen micro stutter Message-ID: <20210323101146.18c9a969@bsd64.grem.de> In-Reply-To: <d793c8b7-e0e2-e0d9-3ecd-923134d15bf3@twcny.rr.com> References: <d793c8b7-e0e2-e0d9-3ecd-923134d15bf3@twcny.rr.com>
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On Mon, 22 Mar 2021 23:50:52 -0400 monochrome <monochrome@twcny.rr.com> wrote: > After about 8 months of struggling to narrow this down I did another > search and saw this: > > https://www.reddit.com/r/freebsd/comments/lc8fwo/freebsd_13_vega_64_micro_stutter_in_x/ > > I haven't seen this come up here so I thought I would bring it up. > > My story started sometime before around August last year when synergy > started getting really annoying with stuttering. Pretty sure it > wasn't like that when I first started tracking 13-current in around > May 2020 (I was on 12 with scfb for a long time before that with no > issues), but since then I have tried to eliminate as many variables > as possible. First I switched to barrier instead of synergy. Shortly > after that I realized it was happening all the time and not just a > network problem, I started using foobillard to verify during tests. I > tried different RAM combinations, different network cards, a variety > of RAM timings, stripping rc.conf etc, powerd settings, also scfb, > with no effect. It is observable with ping -f, a dot or two appears > every time it glitches. It seemed much better with RC2, but now with > RC3 it seems to be back with a vengeance, and since its my main > workstation and barrier/synergy server host for several machines, it > is unbearable to use. Both Win10 and devuan3 on the same machine are > smooth with no issues. Any feedback or info would be appreciated. > > Hardware: > ASRock B450M Pro4 > Ryzen 2400G, no OC > 32M DDR4-2933 > Onboard Vega GPU, drm-fbsd13-kmod > _______________________________________________ Without knowing much about the issue at hand, just a few ideas: Sysctls I would look at: - raising *.cx_lowest - different kern.eventtimer.timer Try running with powerd disabled. Try disabling acpi_thermal (debug.acpi.disabled="thermal") as stated in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234455#c9 Certainly someone else has better ideas though. Best, Michael -- Michael Gmelin
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