Date: Mon, 24 Apr 2023 17:59:52 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 270943] Complete system freeze on Asus dual socket AMD 7742 system Message-ID: <bug-270943-227-IlB5G92oD6@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-270943-227@https.bugs.freebsd.org/bugzilla/> References: <bug-270943-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D270943 --- Comment #2 from Neil Bradley <nb@synthcom.com> --- Workaround for this is to go in to BIOS, select "AMD CBS", then "Processor Features", and change "Global C state control" to "enabled" (or disabled, b= ut this uses more power). "auto" Is the setting that seems to cause the lockup= s. Once changed to enabled or disabled, the system is stable for >12 hours. More detail, with C state control "disabled", I get the following wattage usage: Power in =3D 300 watts Power out =3D 276 watts CPU =3D 168 watts Mem =3D 112 watts root@amd-megaserver:/home/nb # sysctl dev.cpu | grep cx dev.cpu.255.cx_method: C1/hlt dev.cpu.255.cx_usage_counters: 2525 dev.cpu.255.cx_usage: 100.00% last 713773us dev.cpu.255.cx_lowest: C1 dev.cpu.255.cx_supported: C1/1/0 However, when running with C state control "enabled", it's much more reason= able and in line with other operating systems' idle power consumption: Power in =3D 120 watts Power out =3D 108 watts CPU =3D 88 watts Mem =3D 16 watts nb@amd-megaserver:~ $ sysctl dev.cpu | grep cx dev.cpu.255.cx_method: C1/hlt C2/io dev.cpu.255.cx_usage_counters: 1752 0 dev.cpu.255.cx_usage: 100.00% 0.00% last 395716us dev.cpu.255.cx_lowest: C1 dev.cpu.255.cx_supported: C1/1/1 C2/2/400 Unsure of how to properly disposition this, as while this does provide a us= able workaround, it does feel like there's something OS-wise that's not quite ri= ght, given there are no lockup issues with Linux or Windows. Leaving open for the FreeBSD to disposition as they see fit with the information above. --=20 You are receiving this mail because: You are the assignee for the bug.=
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