i386/135447: [i386] [request] Intel Core i7 and Nehalem-EP new
features not supported
Dmitry Kubov
dk at garant.ru
Mon Sep 20 15:00:16 UTC 2010
The following reply was made to PR i386/135447; it has been noted by GNATS.
From: Dmitry Kubov <dk at garant.ru>
To: Andriy Gapon <avg at freebsd.org>
Cc: jh at freebsd.org, brucec at freebsd.org, bug-followup at freebsd.org
Subject: Re: i386/135447: [i386] [request] Intel Core i7 and Nehalem-EP new
features not supported
Date: Mon, 20 Sep 2010 18:54:41 +0400
>> Change is 7.2 upgraded to 8.1
> Great! That was a wise decision on your part.
> But you should have told us/me that (e.g. followed up to your own PR).
> OK, now you can enable use of lower Cx states via hw.acpi.cpu.cx_lowest sysctl and
> the PR can be closed.
Well,
#sysctl hw.acpi.cpu.cx_lowest="C3"
hw.acpi.cpu.cx_lowest: C1 -> C3
few minutes later top statistics
last pid: 90967; load averages: 3.91, 3.32, 2.32 up 15+21:14:21
18:52:30
86 processes: 5 running, 81 sleeping
CPU: 43.8% user, 0.0% nice, 3.3% system, 0.1% interrupt, 52.7% idle
# sysctl dev.cpu
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.P001
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 2934
dev.cpu.0.freq_levels: 2934/105000 2800/82000 2667/71000 2533/64000
2400/55000 2
267/48000 2133/41000 2000/36000 1867/31000 1733/27000 1600/23000
1400/20125 1200/17250 1000/14375 800/11500 600/8625 400/5750 200/2875
dev.cpu.0.cx_supported: C1/3 C2/205 C3/245
dev.cpu.0.cx_lowest: C3
dev.cpu.0.cx_usage: 100.00% 0.00% 0.00% last 500us
dev.cpu.1.%desc: ACPI CPU
dev.cpu.1.%driver: cpu
dev.cpu.1.%location: handle=\_PR_.P002
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%parent: acpi0
dev.cpu.1.cx_supported: C1/3 C2/205 C3/245
dev.cpu.1.cx_lowest: C3
dev.cpu.1.cx_usage: 100.00% 0.00% 0.00% last 500us
dev.cpu.2.%desc: ACPI CPU
dev.cpu.2.%driver: cpu
dev.cpu.2.%location: handle=\_PR_.P003
dev.cpu.2.%pnpinfo: _HID=none _UID=0
dev.cpu.2.%parent: acpi0
dev.cpu.2.cx_supported: C1/3 C2/205 C3/245
dev.cpu.2.cx_lowest: C3
dev.cpu.2.cx_usage: 100.00% 0.00% 0.00% last 500us
dev.cpu.3.%desc: ACPI CPU
dev.cpu.3.%driver: cpu
dev.cpu.3.%location: handle=\_PR_.P004
dev.cpu.3.%pnpinfo: _HID=none _UID=0
dev.cpu.3.%parent: acpi0
dev.cpu.3.cx_supported: C1/3 C2/205 C3/245
dev.cpu.3.cx_lowest: C3
dev.cpu.3.cx_usage: 100.00% 0.00% 0.00% last 500us
dev.cpu.4.%desc: ACPI CPU
dev.cpu.4.%driver: cpu
dev.cpu.4.%location: handle=\_PR_.P005
dev.cpu.4.%pnpinfo: _HID=none _UID=0
dev.cpu.4.%parent: acpi0
dev.cpu.4.cx_supported: C1/3 C2/205 C3/245
dev.cpu.4.cx_lowest: C3
dev.cpu.4.cx_usage: 100.00% 0.00% 0.00% last 500us
dev.cpu.5.%desc: ACPI CPU
dev.cpu.5.%driver: cpu
dev.cpu.5.%location: handle=\_PR_.P006
dev.cpu.5.%pnpinfo: _HID=none _UID=0
dev.cpu.5.%parent: acpi0
dev.cpu.5.cx_supported: C1/3 C2/205 C3/245
dev.cpu.5.cx_lowest: C3
dev.cpu.5.cx_usage: 100.00% 0.00% 0.00% last 500us
dev.cpu.6.%desc: ACPI CPU
dev.cpu.6.%driver: cpu
dev.cpu.6.%location: handle=\_PR_.P007
dev.cpu.6.%pnpinfo: _HID=none _UID=0
dev.cpu.6.%parent: acpi0
dev.cpu.6.cx_supported: C1/3 C2/205 C3/245
dev.cpu.6.cx_lowest: C3
dev.cpu.6.cx_usage: 100.00% 0.00% 0.00% last 500us
dev.cpu.7.%desc: ACPI CPU
dev.cpu.7.%driver: cpu
dev.cpu.7.%location: handle=\_PR_.P008
dev.cpu.7.%pnpinfo: _HID=none _UID=0
dev.cpu.7.%parent: acpi0
dev.cpu.7.cx_supported: C1/3 C2/205 C3/245
dev.cpu.7.cx_lowest: C3
dev.cpu.7.cx_usage: 100.00% 0.00% 0.00% last 500us
C2/C3 not used at all
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