Date: Sat, 3 Apr 2021 08:23:39 +0300 From: Rozhuk Ivan <rozhuk.im@gmail.com> To: Alastair Hogge <agh@riseup.net> Cc: Hans Petter Selasky <hps@selasky.org>, Santiago Martinez <sm@codenetworks.net>, freebsd-current@freebsd.org Subject: Re: freebsd 13 ryzen micro stutter Message-ID: <20210403082339.4e432021@rimwks.local> In-Reply-To: <ec0b7ced3143c68a4a0b1bff6dd7e4ac@riseup.net> References: <d793c8b7-e0e2-e0d9-3ecd-923134d15bf3@twcny.rr.com> <20210323101146.18c9a969@bsd64.grem.de> <ED533759-D326-45D5-8AE2-51CB10763A1E@unrelenting.technology> <677da81d7af9781be6b46c7cba4efd05@riseup.net> <54768f44-c110-d58a-1e7b-61843cde754e@codenetworks.net> <9638abfe-fd9e-6855-b3c7-ee796d1c5ce5@codenetworks.net> <2a4dad60-f1b8-8d48-337a-d23893a84f04@selasky.org> <ec0b7ced3143c68a4a0b1bff6dd7e4ac@riseup.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 31 Mar 2021 02:35:25 -0700 Alastair Hogge <agh@riseup.net> wrote: > On 2021-03-28 16:09, Hans Petter Selasky wrote: > > On 3/27/21 11:54 AM, Santiago Martinez wrote: > >> Hi, i have the same output as @Nils B. If i run with steal =2 and > >> dtrace the micro stutter doesn't happen but as soon as i stop the > >> dtrace script it the stutters come back again. > > > > Here is a patch which you can try. Not sure if it helps. > > https://reviews.freebsd.org/D29467 > > Thanks Hans, this reduces jitter somewhat, but it still noticeable in > Quake2. I left kern.sched.steal_thresh at 1. > I have no micro stutter with default kern.sched.steal_thresh=2, but I have set: kern.sched.balance=0 # Enables the long-term load balancer kern.sched.balance_interval=1000 # Average period in stathz ticks to run the long-term balancer kern.sched.affinity=10000 # Number of hz ticks to keep thread affinity for
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20210403082339.4e432021>