Date: Thu, 06 Jun 2024 09:22:50 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 271826] FreeBSD is disastrously slow on a PowerMac G5, freezing at every command Message-ID: <bug-271826-227-57dzyhRAVN@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-271826-227@https.bugs.freebsd.org/bugzilla/> References: <bug-271826-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D271826 --- Comment #35 from Mitch <mitch_com@hotmail.com> --- (In reply to Justin Hibbits from comment #33) Yesterday I've tried Ben's patch and my machine was way happier, unfortunat= ely the same problem still occurs, just less often. I was able to install 14.1 and use it for a few minutes before the machine crashed while idling. Just trying to understand why we'd want to use memory barriers with the powermac_smp_timebase_sync function. Is it because PPC is using a weak memory model which would be problematic i= n an SMP context like explained below ? https://preshing.com/20120710/memory-barriers-are-like-source-control-opera= tions/ https://preshing.com/20120930/weak-vs-strong-memory-models/ You mentioned that the code is derived from mpc85xx, do we have such a mach= ine in the field which is running a modern release properly ? Also how was FreeBSD handling timebase sync before the introduction of plateform_powermac ? I'll try your suggestions and test it again. --=20 You are receiving this mail because: You are the assignee for the bug.=
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